CN116093255A - Battery system for evaluating lithium ion and sodium ion storage compatibility of positive electrode material - Google Patents

Battery system for evaluating lithium ion and sodium ion storage compatibility of positive electrode material Download PDF

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CN116093255A
CN116093255A CN202310135249.2A CN202310135249A CN116093255A CN 116093255 A CN116093255 A CN 116093255A CN 202310135249 A CN202310135249 A CN 202310135249A CN 116093255 A CN116093255 A CN 116093255A
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lithium
positive electrode
electrolyte
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sodium
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王宏宇
赵旭帆
徐国宝
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Changchun Institute of Applied Chemistry of CAS
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/133Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/054Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M4/36Selection of substances as active materials, active masses, active liquids
    • H01M4/58Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/583Carbonaceous material, e.g. graphite-intercalation compounds or CFx
    • H01M4/587Carbonaceous material, e.g. graphite-intercalation compounds or CFx for inserting or intercalating light metals
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M2004/021Physical characteristics, e.g. porosity, surface area
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00Electrodes
    • H01M4/02Electrodes composed of, or comprising, active material
    • H01M2004/026Electrodes composed of, or comprising, active material characterised by the polarity
    • H01M2004/027Negative electrodes
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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Abstract

The invention relates to a battery system for evaluating the compatibility of a positive electrode material for storing lithium and sodium ions, which comprises a positive electrode capable of storing alkali metal ions, a carbon negative electrode with high specific surface area, a diaphragm and electrolyte. The carbon negative electrode material with high specific surface area used in the invention has stable chemical property and is environment-friendly. It can store solvated alkali metal cations through an electric double layer formed between the lithium ion and the electrolyte, and the solvation radius of lithium ions and sodium ions in the electrolyte is similar, and the storage capacity on the carbon cathode with high specific surface area is equivalent. In the charging process of the battery system, alkali metal ions are extracted from the positive electrode material and enter the electrolyte, and the high specific surface carbon negative electrode adsorbs the alkali metal ions from the electrolyte; in the discharging process, alkali metal ions are desorbed from the carbon negative electrode with high specific surface area and enter the electrolyte, and the alkali metal ions in the electrolyte are intercalated into the positive electrode material. The battery system supports electrolytes that dissolve pure lithium ions, sodium ions, or mixed lithium/sodium ions.

Description

一种评价正极材料存储锂、钠离子兼容性的电池体系A battery system for evaluating the compatibility of cathode materials for storing lithium and sodium ions

技术领域technical field

本发明涉及电化学技术领域,具体涉及一种评价正极材料存储锂、钠离子兼容性的电池体系。The invention relates to the technical field of electrochemistry, in particular to a battery system for evaluating the compatibility of positive electrode materials for storing lithium and sodium ions.

背景技术Background technique

锂离子电池在现代社会运行中发挥着巨大的作用,但其大规模应用却面临着锂资源匮乏、在地球上分布不均等不利因素的严重限制。近年来,钠离子电池作为一种新兴的二次电池,有望在某些应用场景替代锂离子电池,减轻对锂资源的过度依赖。但是现阶段的钠离子电池在能量和功率密度等多项指标上都和锂离子电池存在着不小的差距。由于钠离子和锂离子电池的工作原理都是基于碱金属离子在电极材料中可逆的电化学插嵌/脱嵌反应,因此,开发能够同时兼顾锂/钠离子存储的正极材料以及相关电池体系是可能的。该种电池系统的建立在目前来看,既可以缓解锂资源的短缺,又可以弥补钠离子电池在性能上的短板;从长远来看,还会打通不同种类电池之间的技术隔阂,进一步拓宽储能体系在加工制造以及应用等方面的普适性。基于此,急需设计新型的电池构造,用以评价正极材料对锂、钠离子的存储兼容性。Lithium-ion batteries play a huge role in the operation of modern society, but their large-scale application is severely restricted by unfavorable factors such as lack of lithium resources and uneven distribution on the earth. In recent years, sodium-ion batteries, as an emerging secondary battery, are expected to replace lithium-ion batteries in some application scenarios and reduce excessive dependence on lithium resources. However, there is a big gap between sodium-ion batteries at this stage and lithium-ion batteries in many indicators such as energy and power density. Since the working principles of sodium-ion and lithium-ion batteries are based on the reversible electrochemical intercalation/deintercalation reactions of alkali metal ions in electrode materials, it is important to develop cathode materials and related battery systems that can simultaneously store lithium/sodium ions. possible. At present, the establishment of this kind of battery system can not only alleviate the shortage of lithium resources, but also make up for the shortcomings of sodium-ion batteries in performance; in the long run, it will also open up the technical barriers between different types of batteries, and further Broaden the universality of energy storage systems in terms of processing, manufacturing and applications. Based on this, it is urgent to design a new battery structure to evaluate the storage compatibility of cathode materials for lithium and sodium ions.

既有锂离子电池(或钠离子电池)的正极材料储锂(或储钠)性能的评价往往采用锂金属负极(或钠金属负极)的半电池体系。在锂/钠离子混合的电解液体系中,如果使用单一的碱金属负极,负极上发生的碱金属不可逆溶解/沉积往往会改变电解液中碱金属离子的相对含量,从而干扰对正极材料存储锂/钠离子选择性的正确判断。另外,碱金属还原性强,在有机电解液中具有潜在的安全隐患。所以寻找一种使用可以无差别可逆存储锂/钠离子的负极材料,并且安全可靠的电池体系是非常必要的。The evaluation of the lithium storage (or sodium storage) performance of the positive electrode material of the existing lithium ion battery (or sodium ion battery) often adopts the half-cell system of the lithium metal negative electrode (or sodium metal negative electrode). In a lithium/sodium ion mixed electrolyte system, if a single alkali metal negative electrode is used, the irreversible dissolution/deposition of alkali metal on the negative electrode will often change the relative content of alkali metal ions in the electrolyte, thereby interfering with the storage of lithium on the positive electrode material. / Correct judgment of sodium ion selectivity. In addition, alkali metals are highly reducing, which poses potential safety hazards in organic electrolytes. Therefore, it is very necessary to find a safe and reliable battery system using negative electrode materials that can store lithium/sodium ions indiscriminately and reversibly.

发明内容Contents of the invention

本发明要解决现有技术中的技术问题,提供一种评价正极材料存储锂、钠离子兼容性的电池体系,该电池体系支持溶解纯粹的锂离子、钠离子或者混合锂/钠离子的电解液。The present invention solves the technical problems in the prior art and provides a battery system for evaluating the compatibility of positive electrode materials for storing lithium and sodium ions. The battery system supports electrolytes that dissolve pure lithium ions, sodium ions or mixed lithium/sodium ions .

为了解决上述技术问题,本发明的技术方案具体如下:In order to solve the problems of the technologies described above, the technical solution of the present invention is specifically as follows:

本发明提供一种评价正极材料存储锂、钠离子兼容性的电池体系,包括正极、负极、介于正极和负极之间的隔膜与电解液;所述正极包括存储碱金属离子的活性物质;所述负极包括高比表面积炭。The invention provides a battery system for evaluating the compatibility of positive electrode materials for storing lithium and sodium ions, including a positive electrode, a negative electrode, a separator between the positive electrode and the negative electrode, and an electrolyte; the positive electrode includes an active material for storing alkali metal ions; The negative electrode includes high specific surface area carbon.

在上述技术方案中,优选的是,所述高比表面积炭的比表面积为10~3000m2/g。In the above technical solution, preferably, the specific surface area of the high specific surface area carbon is 10-3000 m 2 /g.

在上述技术方案中,优选的是,所述正极包括钴酸锂(LiCoO2)、锰酸锂(LiMn2O4)、镍锰酸锂(LiNi0.5Mn1.5O4)或磷酸铁锂(LiFePO4)等存储碱金属离子的活性物质。进一步优选的活性物质是锰酸锂(LiMn2O4)或磷酸铁锂(LiFePO4),再进一步优选的活性物质是磷酸铁锂(LiFePO4)。In the above technical solution, preferably, the positive electrode includes lithium cobalt oxide (LiCoO 2 ), lithium manganese oxide (LiMn 2 O 4 ), lithium nickel manganese oxide (LiNi 0.5 Mn 1.5 O 4 ) or lithium iron phosphate (LiFePO 4 ) and other active substances that store alkali metal ions. A more preferred active material is lithium manganese oxide (LiMn 2 O 4 ) or lithium iron phosphate (LiFePO 4 ), and a further preferred active material is lithium iron phosphate (LiFePO 4 ).

在上述技术方案中,优选的是,所述正极包括活性物质、导电剂、粘结剂和集流体。进一步优选的是,所述导电剂为乙炔黑,所述粘结剂为聚四氟乙烯或聚偏氟乙烯等。In the above technical solution, preferably, the positive electrode includes an active material, a conductive agent, a binder and a current collector. Further preferably, the conductive agent is acetylene black, and the binder is polytetrafluoroethylene or polyvinylidene fluoride.

在上述技术方案中,优选的是,所述负极包括高比表面积炭、导电剂、粘结剂和集流体。进一步优选的是,所述导电剂为乙炔黑,所述粘结剂为聚四氟乙烯或聚偏氟乙烯等。In the above technical solution, preferably, the negative electrode includes carbon with a high specific surface area, a conductive agent, a binder and a current collector. Further preferably, the conductive agent is acetylene black, and the binder is polytetrafluoroethylene or polyvinylidene fluoride.

在上述技术方案中,优选的是,高比表面积炭与存储碱金属离子的活性物质的质量之比为1:1~1:5。进一步优选的是,高比表面积炭与存储碱金属离子的活性物质的质量之比为1:3。In the above technical solution, preferably, the mass ratio of the high specific surface area carbon to the active material storing alkali metal ions is 1:1-1:5. Further preferably, the mass ratio of the high specific surface area carbon to the active material storing alkali metal ions is 1:3.

在上述技术方案中,优选的是,所述电解液包括电解质和有机溶剂,所述电解质为锂盐、钠盐或两者的混合物,所述有机溶剂为碳酸脂、腈、砜、羧酸酯、醚类有机溶剂中的一种或多种,所述锂盐为六氟磷酸锂(LiPF6)、高氯酸锂(LiClO4)或双氟磺酰亚胺锂(LiFSI),所述钠盐为六氟磷酸钠(NaPF6)、高氯酸钠(NaClO4)或双氟磺酰亚胺钠(NaFSI)。In the above technical scheme, it is preferred that the electrolyte includes an electrolyte and an organic solvent, the electrolyte is lithium salt, sodium salt or a mixture of the two, and the organic solvent is carbonate, nitrile, sulfone, carboxylate , one or more of ether organic solvents, the lithium salt is lithium hexafluorophosphate (LiPF 6 ), lithium perchlorate (LiClO 4 ) or lithium bisfluorosulfonyl imide (LiFSI), the sodium salt is hexafluorophosphate Sodium fluorophosphate (NaPF 6 ), sodium perchlorate (NaClO 4 ), or sodium bisfluorosulfonimide (NaFSI).

在上述技术方案中,进一步优选的是,所述有机溶剂为碳酸乙烯酯(EC)和碳酸甲乙酯(EMC),EC:EMC的体积比为3:7。In the above technical scheme, it is further preferred that the organic solvent is ethylene carbonate (EC) and ethyl methyl carbonate (EMC), and the volume ratio of EC:EMC is 3:7.

在上述技术方案中,优选的是,所述电解质在电解液中的总摩尔浓度为0.1-3M。In the above technical solution, preferably, the total molar concentration of the electrolyte in the electrolyte is 0.1-3M.

在上述技术方案中,优选的是,所述隔膜的材料为玻璃纤维或者是聚乙烯或者是聚丙烯多孔膜。In the above technical solution, preferably, the material of the separator is glass fiber or polyethylene or polypropylene porous membrane.

本发明的有益效果是:The beneficial effects of the present invention are:

与现有技术相比,本发明的评价正极材料存储锂、钠离子兼容性的电池体系,使用的高比表面积炭负极材料化学性质稳定,绿色环保。它可以通过和电解液之间形成的双电层来存储溶剂化碱金属阳离子,而锂离子和钠离子在有机电解液中的溶剂化半径相仿,在高比表面积炭负极上的存储容量相当。本发明的电池体系在充电过程中,碱金属离子从正极材料中脱嵌,进入到电解液中,高比表面积炭负极从电解液中吸附碱金属离子;在放电过程中,碱金属离子从高比表面积炭负极脱附,进入到电解液中,电解液中的碱金属离子插嵌正极材料。从理论上讲,电解液中碱金属离子浓度之和恒定。Compared with the prior art, the battery system for evaluating the compatibility of positive electrode materials for storing lithium and sodium ions of the present invention uses a high specific surface area carbon negative electrode material with stable chemical properties and is environmentally friendly. It can store solvated alkali metal cations through the electric double layer formed between it and the electrolyte, while the solvation radius of lithium ions and sodium ions in the organic electrolyte is similar, and the storage capacity on the high specific surface area carbon anode is equivalent. In the charging process of the battery system of the present invention, the alkali metal ions are deintercalated from the positive electrode material and enter the electrolyte, and the high specific surface area carbon negative electrode absorbs the alkali metal ions from the electrolyte; The specific surface area carbon desorbs from the negative electrode and enters the electrolyte, and the alkali metal ions in the electrolyte are intercalated into the positive electrode material. Theoretically, the sum of the concentration of alkali metal ions in the electrolyte is constant.

本发明的评价正极材料存储锂、钠离子兼容性的电池体系,采用正极材料为锰酸锂(LiMn2O4)、磷酸铁锂(LiFePO4);实验结果表明,两种正极材料不仅能够兼容锂/钠离子插嵌,而且在不损失太多容量的前提下,具有良好的循环性能。The battery system for evaluating the compatibility of positive electrode materials for storing lithium and sodium ions in the present invention adopts positive electrode materials such as lithium manganate (LiMn 2 O 4 ) and lithium iron phosphate (LiFePO 4 ); the experimental results show that the two positive electrode materials can not only be compatible Li/Na ion intercalation and good cycle performance without losing too much capacity.

特别是,磷酸铁锂是一种橄榄石结构的锂离子电池正极材料,不仅能够兼容锂/钠离子插嵌,而且在不损失太多容量的前提下,具有良好的循环性能。以LiFePO4-活性炭为例,开发能够同时兼顾锂/钠离子存储的电极材料以及相关电池体系是可能的。从目前来看,该种电池系统的建立既可以缓解锂资源的短缺,又可以弥补钠离子电池在性能上的短板;从长远来看,还会打通不同种类电池之间的技术隔阂,进一步拓宽储能体系在加工制造以及应用等方面的普适性。In particular, lithium iron phosphate is an olivine-structured lithium-ion battery cathode material, which is not only compatible with lithium/sodium ion intercalation, but also has good cycle performance without losing too much capacity. Taking LiFePO 4 -activated carbon as an example, it is possible to develop electrode materials and related battery systems that can simultaneously store lithium/sodium ions. From the current point of view, the establishment of this battery system can not only alleviate the shortage of lithium resources, but also make up for the shortcomings of sodium-ion batteries in performance; in the long run, it will also open up the technical barriers between different types of batteries, and further Broaden the universality of energy storage systems in manufacturing and applications.

附图说明Description of drawings

下面结合附图和具体实施方式对本发明作进一步详细说明。The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

图1为本发明对比例1~7制备的三电极体系的分极电势曲线;Fig. 1 is the polarized potential curve of the three-electrode system prepared by comparative examples 1 to 7 of the present invention;

图2为本发明对比例8~14制备的钴酸锂-活性炭扣式电池的首圈充放电曲线;Fig. 2 is the charge-discharge curve of the first circle of the lithium cobaltate-activated carbon button battery prepared in Comparative Examples 8-14 of the present invention;

图3为本发明对比例8~14制备的钴酸锂-活性炭扣式电池的充、放电容量和循环次数关系曲线;Fig. 3 is the charge-discharge capacity and cycle number relationship curve of the lithium cobaltate-activated carbon button battery prepared in Comparative Examples 8-14 of the present invention;

图4为本发明对比例15~21制备的镍锰酸锂-活性炭扣式电池的首圈充放电曲线;Fig. 4 is the charge-discharge curve of the first cycle of lithium nickel manganese oxide-activated carbon button cell prepared by Comparative Examples 15-21 of the present invention;

图5为本发明对比例15~21制备的镍锰酸锂-活性炭扣式电池的充、放电容量和循环次数关系曲线;Fig. 5 is the charge-discharge capacity and cycle number relational curve of the lithium nickel manganese oxide-activated carbon button cell prepared by Comparative Examples 15-21 of the present invention;

图6为本发明实施例1~7制备的锰酸锂-活性炭扣式电池的首圈充放电曲线;Fig. 6 is the charge-discharge curve of the first cycle of the lithium manganate-activated carbon button battery prepared in Examples 1 to 7 of the present invention;

图7为本发明实施例1~7制备的锰酸锂-活性炭扣式电池的充、放电容量和循环次数关系曲线;Fig. 7 is the relational curve of charging and discharging capacity and number of cycles of lithium manganate-activated carbon button batteries prepared in Examples 1 to 7 of the present invention;

图8为本发明实施例8~14制备的磷酸铁锂-活性炭扣式电池的首圈充放电曲线;Fig. 8 is the first cycle charge and discharge curves of lithium iron phosphate-activated carbon button batteries prepared in Examples 8 to 14 of the present invention;

图9为本发明实施例8~14制备的磷酸铁锂-活性炭扣式电池的充、放电容量和循环次数关系曲线。Fig. 9 is a graph showing the relationship between charge and discharge capacity and cycle times of lithium iron phosphate-activated carbon button batteries prepared in Examples 8-14 of the present invention.

具体实施方式Detailed ways

为了进一步了解本发明,下面将结合实施例,对本发明的技术方案进行系统,严谨地描述,但值得注意的是,所描述的实施例仅仅是本发明的一部分实施例,而并非全部。此外,这些实施例描述只是为了进一步说明本发明的特点和优势而不是对本发明权利要求的限制。In order to further understand the present invention, the following will systematically and rigorously describe the technical solution of the present invention in conjunction with the embodiments, but it should be noted that the described embodiments are only part of the embodiments of the present invention, not all of them. In addition, the descriptions of these embodiments are only for further illustrating the features and advantages of the present invention rather than limiting the claims of the present invention.

本发明所有原料,对其来源并不做特别限制,在市场上购买的或者按照本领域技术人员熟知的常规方法制备即可。All the raw materials of the present invention are not particularly limited to their sources, they can be purchased from the market or prepared according to conventional methods well known to those skilled in the art.

本发明所有原料,对其纯度等级没有特别限制,本发明优先采用电池级或分析纯。All raw materials in the present invention have no special limitation on their purity grades, and the present invention preferably adopts battery grade or analytical purity.

本发明提供了一种评价正极材料存储锂、钠离子兼容性的电池体系,所述电池体系包括正极,负极,介于正极和负极之间的电解液和隔膜,其中正极材料包括钴酸锂(LiCoO2)、锰酸锂(LiMn2O4)、镍锰酸锂(LiNi0.5Mn1.5O4)、磷酸铁锂(LiFePO4)等存储碱金属离子的活性物质,所述负极包括高比表面积炭,本领域技术人员可根据实际情况、产品性能以及质量要求进行选择和调整。本发明中所述负极材料高比表面积炭优选为活性炭。本发明对所述负极材料没有其他特殊限制,本领域可以根据实际情况、产品性能以及质量要求进行选择和调整。本发明对所述电解液没有特别限制,以本领域技术人员熟知的能够用于锂/钠离子电池的电解质和有机溶剂即可。本发明对隔膜材料没有特别限制,以本领域技术人员熟知的能够用于大部分离子电池的隔膜材料即可。The invention provides a battery system for evaluating the compatibility of positive electrode materials to store lithium and sodium ions. The battery system includes a positive electrode, a negative electrode, an electrolyte and a diaphragm between the positive electrode and the negative electrode, wherein the positive electrode material includes lithium cobaltate ( LiCoO 2 ), lithium manganese oxide (LiMn 2 O 4 ), lithium nickel manganese oxide (LiNi 0.5 Mn 1.5 O 4 ), lithium iron phosphate (LiFePO 4 ) and other active materials for storing alkali metal ions, the negative electrode includes a high specific surface area Carbon, those skilled in the art can select and adjust according to the actual situation, product performance and quality requirements. The high specific surface area carbon of the negative electrode material in the present invention is preferably activated carbon. The present invention has no other special restrictions on the negative electrode material, which can be selected and adjusted according to the actual situation, product performance and quality requirements in the field. In the present invention, the electrolyte is not particularly limited, and electrolytes and organic solvents known to those skilled in the art can be used for lithium/sodium ion batteries. In the present invention, there is no special limitation on the diaphragm material, and the diaphragm materials known to those skilled in the art can be used in most ion batteries.

本发明对所述电池体系的制备方法没有特殊限制,采用本领域技术人员熟知的制备电池的方法即可。具体步骤优选为:在充满氩气氛围的手套箱配置上述电解液,将所述可存储碱金属离子的正极、高比表面积炭负极、电解液和隔膜组装成扣式电池。The present invention has no special limitation on the preparation method of the battery system, and the methods for preparing batteries well known to those skilled in the art can be used. The specific steps are preferably as follows: disposing the above-mentioned electrolyte solution in a glove box filled with argon atmosphere, and assembling the positive electrode capable of storing alkali metal ions, the high specific surface area carbon negative electrode, the electrolyte solution and the separator into a button battery.

对本发明提供的电池体系进行充放电测试,来表征电池体系的容量和循环性能。实验结果表明,电解液中钠离子浓度由10%变化到90%时,如果选用锰酸锂(LiMn2O4)作为正极活性物质,电池的首圈放电容量由110mAh g–1变化到70mAh g–1,容量衰减36%;如果选用磷酸铁锂(LiFePO4)作为正极活性物质,电池的首圈放电容量由100mAh g–1变化到80mAhg–1,容量衰减20%。而如果选择镍锰酸锂(LiNi0.5Mn1.5O4)作为正极活性物质,电池的首圈放电容量则由100mAh g–1变化到25mAh g–1,容量衰减75%;如果选择钴酸锂(LiCoO2)作为正极活性物质,电池的首圈放电容量则由140mAh g–1变化到100mAh g–1,容量衰减29%。Charge and discharge tests are performed on the battery system provided by the present invention to characterize the capacity and cycle performance of the battery system. The experimental results show that when the concentration of sodium ions in the electrolyte changes from 10% to 90%, if lithium manganese oxide (LiMn 2 O 4 ) is used as the positive electrode active material, the first cycle discharge capacity of the battery changes from 110mAh g -1 to 70mAh g –1 , the capacity decays by 36%; if lithium iron phosphate (LiFePO 4 ) is used as the positive electrode active material, the first cycle discharge capacity of the battery changes from 100mAh g –1 to 80mAhg –1 , and the capacity decays by 20%. However, if lithium nickel manganese oxide (LiNi 0.5 Mn 1.5 O 4 ) is selected as the positive electrode active material, the first cycle discharge capacity of the battery changes from 100mAh g –1 to 25mAh g –1 , and the capacity decays by 75%; if lithium cobalt oxide ( LiCoO 2 ) was used as the positive electrode active material, and the first-cycle discharge capacity of the battery changed from 140mAh g -1 to 100mAh g -1 , with a capacity decay of 29%.

实验结果表明,用钴酸锂(LiCoO2)作为电池正极活性物质可以得到较高的首圈放电容量,但它的循环性能较差,在电解液中钠离子含量为10%的条件下循环100周,容量仅剩25mAh g–1左右,容量衰减82%;而用磷酸铁锂(LiFePO4)作为电池正极活性物质时,同样循环100周,即使电解液中钠离子含量为100%,仍然具有45mAh g–1左右的放电容量,容量衰减36%,这充分说明了磷酸铁锂(LiFePO4)正极不仅可以很好的兼容锂、钠离子存储,而且具有卓越的循环性能。The experimental results show that using lithium cobaltate (LiCoO 2 ) as the positive electrode active material of the battery can obtain a higher first-cycle discharge capacity, but its cycle performance is poor, and it can be cycled for 100 cycles under the condition that the sodium ion content in the electrolyte is 10%. cycle, the capacity is only about 25mAh g -1 , and the capacity decays by 82%; and when lithium iron phosphate (LiFePO 4 ) is used as the positive electrode active material of the battery, it is also cycled for 100 cycles, even if the sodium ion content in the electrolyte is 100%, it still has The discharge capacity is about 45mAh g –1 and the capacity fades by 36%, which fully demonstrates that the lithium iron phosphate (LiFePO 4 ) cathode is not only well compatible with lithium and sodium ion storage, but also has excellent cycle performance.

此外,为了说明活性炭负极一侧对锂/钠离子选择的无差别性,对本发明提供的电池体系进行分极电势测定。经测试,对于任意锂/钠离子配比的电解液,高比表面积炭负极一侧的分极电势曲线能很好重合。说明高比表面积炭负极一侧对锂、钠离子的选择并无差别,进一步论证了该电池体系的可行性。In addition, in order to illustrate the indiscriminate selection of lithium/sodium ions on the side of the activated carbon negative electrode, the battery system provided by the present invention was measured for polarization potential. After testing, for any electrolyte solution with any lithium/sodium ion ratio, the polarization potential curves on the side of the carbon negative electrode with high specific surface area can be well overlapped. It shows that there is no difference in the selection of lithium and sodium ions on the side of the high specific surface area carbon negative electrode, and further demonstrates the feasibility of the battery system.

为了进一步说明本发明,下面结合实施例对本发明提供的电池体系进行详细说明,本发明的保护范围不受以下实施例的限制。In order to further illustrate the present invention, the battery system provided by the present invention will be described in detail below in conjunction with examples, and the scope of protection of the present invention is not limited by the following examples.

以下实施例中所用的试剂均为市场销售的。The reagents used in the following examples are all commercially available.

配置[Na+]/[Li+]溶液只要是使用同种阴离子下的锂盐和钠盐配置即可,以下对比例和实施例中均是使用六氟磷酸锂(LiPF6)和六氟磷酸钠(NaPF6)配置的[Na+]/[Li+]溶液,其中[Na+]/[Li+]的比例均为摩尔比。To configure [Na + ]/[Li + ] solution, as long as the lithium salt and sodium salt under the same anion are used to configure, lithium hexafluorophosphate (LiPF 6 ) and sodium hexafluorophosphate (NaPF 6 ) are used in the following comparative examples and examples. 6 ) A configured [Na + ]/[Li + ] solution, wherein the ratios of [Na + ]/[Li + ] are molar ratios.

对比例1Comparative example 1

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1分别制备活性炭正极(18mg)、负极(18mg)和参比电极(24mg),以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置1M LiPF6溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合溶液,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述活性炭电极为正、负和参比电极,在手套箱中制作三电极体系,隔膜为玻璃纤维;将三电极体系放置在室温下(22℃)进行分极电势测定。In a mortar, the active carbon positive electrode (18mg), negative electrode (18mg) and reference The specific electrode (24mg) was pressed on the aluminum mesh with a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. Configure 1M LiPF 6 solution in glove box, wherein, the solvent of described solution is the mixed solution of EC and EMC (volume ratio EC:EMC=3:7), the above-mentioned configured solution is left standstill 12 hours in glove box . Using the above solution as the electrolyte, and the above-mentioned activated carbon electrode as the positive, negative and reference electrodes, a three-electrode system is made in a glove box, and the diaphragm is glass fiber; the three-electrode system is placed at room temperature (22 ° C) for polarization potential Determination.

对比例2Comparative example 2

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1分别制备活性炭正极(18mg)、负极(18mg)和参比电极(24mg),以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=1:9(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合溶液,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述活性炭电极为正、负和参比电极,在手套箱中制作三电极体系,隔膜为玻璃纤维;将三电极体系放置在室温下(22℃)进行分极电势测定。In a mortar, the active carbon positive electrode (18mg), negative electrode (18mg) and reference The specific electrode (24mg) was pressed on the aluminum mesh with a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. Configure a solution of [Na + ]/[Li + ]=1:9 (total 1M) in the glove box, wherein the solvent of the solution is a mixed solution of EC and EMC (volume ratio EC:EMC=3:7) , the above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, and the above-mentioned activated carbon electrode as the positive, negative and reference electrodes, a three-electrode system is made in a glove box, and the diaphragm is glass fiber; the three-electrode system is placed at room temperature (22 ° C) for polarization potential Determination.

对比例3Comparative example 3

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1分别制备活性炭正极(18mg)、负极(18mg)和参比电极(24mg),以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=3:7(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合溶液,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述活性炭电极为正、负和参比电极,在手套箱中制作三电极体系,隔膜为玻璃纤维;将三电极体系放置在室温下(22℃)进行分极电势测定。In a mortar, the active carbon positive electrode (18mg), negative electrode (18mg) and reference The specific electrode (24mg) was pressed on the aluminum mesh with a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. Configure a solution of [Na + ]/[Li + ]=3:7 (total 1M) in the glove box, wherein the solvent of the solution is a mixed solution of EC and EMC (volume ratio EC:EMC=3:7) , the above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, and the above-mentioned activated carbon electrode as the positive, negative and reference electrodes, a three-electrode system is made in a glove box, and the diaphragm is glass fiber; the three-electrode system is placed at room temperature (22 ° C) for polarization potential Determination.

对比例4Comparative example 4

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1分别制备活性炭正极(18mg)、负极(18mg)和参比电极(24mg),以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=5:5(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合溶液,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述活性炭电极为正、负和参比电极,在手套箱中制作三电极体系,隔膜为玻璃纤维;将三电极体系放置在室温下(22℃)进行分极电势测定。In a mortar, the active carbon positive electrode (18mg), negative electrode (18mg) and reference The specific electrode (24mg) was pressed on the aluminum mesh with a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. Configure a solution of [Na + ]/[Li + ]=5:5 (1M in total) in the glove box, wherein the solvent of the solution is a mixed solution of EC and EMC (volume ratio EC:EMC=3:7) , the above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, and the above-mentioned activated carbon electrode as the positive, negative and reference electrodes, a three-electrode system is made in a glove box, and the diaphragm is glass fiber; the three-electrode system is placed at room temperature (22 ° C) for polarization potential Determination.

对比例5Comparative example 5

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1分别制备活性炭正极(18mg)、负极(18mg)和参比电极(24mg),以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=7:3(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合溶液,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述活性炭电极为正、负和参比电极,在手套箱中制作三电极体系,隔膜为玻璃纤维;将三电极体系放置在室温下(22℃)进行分极电势测定。In a mortar, the active carbon positive electrode (18mg), negative electrode (18mg) and reference The specific electrode (24mg) was pressed on the aluminum mesh with a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. Configure a solution of [Na + ]/[Li + ]=7:3 (total 1M) in the glove box, wherein the solvent of the solution is a mixed solution of EC and EMC (volume ratio EC:EMC=3:7) , the above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, and the above-mentioned activated carbon electrode as the positive, negative and reference electrodes, a three-electrode system is made in a glove box, and the diaphragm is glass fiber; the three-electrode system is placed at room temperature (22 ° C) for polarization potential Determination.

对比例6Comparative example 6

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1分别制备活性炭正极(18mg)、负极(18mg)和参比电极(24mg),以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=9:1(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合溶液,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述活性炭电极为正、负和参比电极,在手套箱中制作三电极体系,隔膜为玻璃纤维;将三电极体系放置在室温下(22℃)进行分极电势测定。In a mortar, the active carbon positive electrode (18mg), negative electrode (18mg) and reference The specific electrode (24mg) was pressed on the aluminum mesh with a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. Configure a solution of [Na + ]/[Li + ]=9:1 (total 1M) in the glove box, wherein the solvent of the solution is a mixed solution of EC and EMC (volume ratio EC:EMC=3:7) , the above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, and the above-mentioned activated carbon electrode as the positive, negative and reference electrodes, a three-electrode system is made in a glove box, and the diaphragm is glass fiber; the three-electrode system is placed at room temperature (22 ° C) for polarization potential Determination.

对比例7Comparative example 7

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1分别制备活性炭正极(18mg)、负极(18mg)和参比电极(24mg),以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置1M NaPF6溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合溶液,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述活性炭电极为正、负和参比电极,在手套箱中制作三电极体系,隔膜为玻璃纤维;将三电极体系放置在室温下(22℃)进行分极电势测定。In a mortar, the active carbon positive electrode (18mg), negative electrode (18mg) and reference The specific electrode (24mg) was pressed on the aluminum mesh with a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. Configure 1M NaPF 6 solution in glove box, wherein, the solvent of described solution is the mixed solution of EC and EMC (volume ratio EC:EMC=3:7), the above-mentioned configured solution is left standstill 12 hours in glove box . Using the above solution as the electrolyte, and the above-mentioned activated carbon electrode as the positive, negative and reference electrodes, a three-electrode system is made in a glove box, and the diaphragm is glass fiber; the three-electrode system is placed at room temperature (22 ° C) for polarization potential Determination.

对比例8Comparative example 8

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1(12mg:6mg)研制活性炭负极,以LiCoO2和TAB质量比为2:1(4mg:2mg)研制钴酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置1M LiPF6溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合溶液,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述钴酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a mass ratio of 2:1 (12mg:6mg), and LiCoO 2 and TAB The lithium cobalt oxide positive electrode was developed with a mass ratio of 2:1 (4mg:2mg), and the positive and negative electrodes were pressed on the aluminum mesh at a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. Configure 1M LiPF 6 solution in glove box, wherein, the solvent of described solution is the mixed solution of EC and EMC (volume ratio EC:EMC=3:7), the above-mentioned configured solution is left standstill 12 hours in glove box . Using the above solution as the electrolyte, using the above-mentioned lithium cobaltate and activated carbon electrodes as positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

对比例9Comparative example 9

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1(12mg:6mg)研制活性炭负极,以LiCoO2和TAB质量比为2:1(4mg:2mg)研制钴酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=1:9(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述钴酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a mass ratio of 2:1 (12mg:6mg), and LiCoO 2 and TAB The lithium cobalt oxide positive electrode was developed with a mass ratio of 2:1 (4mg:2mg), and the positive and negative electrodes were pressed on the aluminum mesh at a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A solution of [Na + ]/[Li + ]=1:9 (total 1M) was configured in the glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), The above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the above-mentioned lithium cobaltate and activated carbon electrodes as positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

对比例10Comparative example 10

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1(12mg:6mg)研制活性炭负极,以LiCoO2和TAB质量比为2:1(4mg:2mg)研制钴酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=3:7(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述钴酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a mass ratio of 2:1 (12mg:6mg), and LiCoO 2 and TAB The lithium cobalt oxide positive electrode was developed with a mass ratio of 2:1 (4mg:2mg), and the positive and negative electrodes were pressed on the aluminum mesh at a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A solution of [Na + ]/[Li + ]=3:7 (total 1M) was configured in the glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), The above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the above-mentioned lithium cobaltate and activated carbon electrodes as positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

对比例11Comparative example 11

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1(12mg:6mg)研制活性炭负极,以LiCoO2和TAB质量比为2:1(4mg:2mg)研制钴酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=5:5(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述钴酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a mass ratio of 2:1 (12mg:6mg), and LiCoO 2 and TAB The lithium cobalt oxide positive electrode was developed with a mass ratio of 2:1 (4mg:2mg), and the positive and negative electrodes were pressed on the aluminum mesh at a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A solution of [Na + ]/[Li + ]=5:5 (total 1M) was configured in the glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), The above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the above-mentioned lithium cobaltate and activated carbon electrodes as positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

对比例12Comparative example 12

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1(12mg:6mg)研制活性炭负极,以LiCoO2和TAB质量比为2:1(4mg:2mg)研制钴酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=7:3(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述钴酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a mass ratio of 2:1 (12mg:6mg), and LiCoO 2 and TAB The lithium cobalt oxide positive electrode was developed with a mass ratio of 2:1 (4mg:2mg), and the positive and negative electrodes were pressed on the aluminum mesh at a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A solution of [Na + ]/[Li + ]=7:3 (total 1M) was configured in the glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), The above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the above-mentioned lithium cobaltate and activated carbon electrodes as positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

对比例13Comparative example 13

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1(12mg:6mg)研制活性炭负极,以LiCoO2和TAB质量比为2:1(4mg:2mg)研制钴酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=9:1(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述钴酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a mass ratio of 2:1 (12mg:6mg), and LiCoO 2 and TAB The lithium cobalt oxide positive electrode was developed with a mass ratio of 2:1 (4mg:2mg), and the positive and negative electrodes were pressed on the aluminum mesh at a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A solution of [Na + ]/[Li + ]=9:1 (total 1M) was configured in the glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), The above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the above-mentioned lithium cobaltate and activated carbon electrodes as positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

对比例14Comparative example 14

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1(12mg:6mg)研制活性炭负极,以LiCoO2和TAB质量比为2:1(4mg:2mg)研制钴酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置1M NaPF6溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述钴酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a mass ratio of 2:1 (12mg:6mg), and LiCoO 2 and TAB The lithium cobalt oxide positive electrode was developed with a mass ratio of 2:1 (4mg:2mg), and the positive and negative electrodes were pressed on the aluminum mesh at a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A 1M NaPF 6 solution was configured in a glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), and the above configured solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the above-mentioned lithium cobaltate and activated carbon electrodes as positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

对比例15Comparative example 15

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1(12mg:6mg)研制活性炭负极,以LiNi0.5Mn1.5O4和TAB质量比为2:1(4mg:2mg)研制镍锰酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置1M LiPF6溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述镍锰酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a mass ratio of 2:1 (12mg:6mg), and LiNi 0.5 Mn 1.5 The mass ratio of O 4 and TAB was 2:1 (4mg:2mg) to develop lithium nickel manganese oxide positive electrode, and the positive and negative electrodes were pressed on the aluminum mesh at a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A 1M LiPF 6 solution was configured in a glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), and the above configured solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the lithium nickel manganese oxide and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging Long loop test.

对比例16Comparative example 16

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1(12mg:6mg)研制活性炭负极,以LiNi0.5Mn1.5O4和TAB质量比为2:1(4mg:2mg)研制镍锰酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=1:9(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述镍锰酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a mass ratio of 2:1 (12mg:6mg), and LiNi 0.5 Mn 1.5 The mass ratio of O 4 and TAB was 2:1 (4mg:2mg) to develop lithium nickel manganese oxide positive electrode, and the positive and negative electrodes were pressed on the aluminum mesh at a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A solution of [Na + ]/[Li + ]=1:9 (total 1M) was configured in the glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), The above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the lithium nickel manganese oxide and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging Long loop test.

对比例17Comparative example 17

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1(12mg:6mg)研制活性炭负极,以LiNi0.5Mn1.5O4和TAB质量比为2:1(4mg:2mg)研制镍锰酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=3:7(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述镍锰酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a mass ratio of 2:1 (12mg:6mg), and LiNi 0.5 Mn 1.5 The mass ratio of O 4 and TAB was 2:1 (4mg:2mg) to develop lithium nickel manganese oxide positive electrode, and the positive and negative electrodes were pressed on the aluminum mesh at a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A solution of [Na + ]/[Li + ]=3:7 (total 1M) was configured in the glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), The above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the lithium nickel manganese oxide and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging Long loop test.

对比例18Comparative example 18

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1(12mg:6mg)研制活性炭负极,以LiNi0.5Mn1.5O4和TAB质量比为2:1(4mg:2mg)研制镍锰酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=5:5(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述镍锰酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a mass ratio of 2:1 (12mg:6mg), and LiNi 0.5 Mn 1.5 The mass ratio of O 4 and TAB was 2:1 (4mg:2mg) to develop lithium nickel manganese oxide positive electrode, and the positive and negative electrodes were pressed on the aluminum mesh at a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A solution of [Na + ]/[Li + ]=5:5 (total 1M) was configured in the glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), The above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the lithium nickel manganese oxide and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging Long loop test.

对比例19Comparative example 19

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1(12mg:6mg)研制活性炭负极,以LiNi0.5Mn1.5O4和TAB质量比为2:1(4mg:2mg)研制镍锰酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=7:3(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述镍锰酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a mass ratio of 2:1 (12mg:6mg), and LiNi 0.5 Mn 1.5 The mass ratio of O 4 and TAB was 2:1 (4mg:2mg) to develop lithium nickel manganese oxide positive electrode, and the positive and negative electrodes were pressed on the aluminum mesh at a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A solution of [Na + ]/[Li + ]=7:3 (total 1M) was configured in the glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), The above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the lithium nickel manganese oxide and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging Long loop test.

对比例20Comparative example 20

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1(12mg:6mg)研制活性炭负极,以LiNi0.5Mn1.5O4和TAB质量比为2:1(4mg:2mg)研制镍锰酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=9:1(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述镍锰酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a mass ratio of 2:1 (12mg:6mg), and LiNi 0.5 Mn 1.5 The mass ratio of O 4 and TAB was 2:1 (4mg:2mg) to develop lithium nickel manganese oxide positive electrode, and the positive and negative electrodes were pressed on the aluminum mesh at a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A solution of [Na + ]/[Li + ]=9:1 (total 1M) was configured in the glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), The above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the lithium nickel manganese oxide and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging Long loop test.

对比例21Comparative example 21

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)质量比为2:1(12mg:6mg)研制活性炭负极,以LiNi0.5Mn1.5O4和TAB质量比为2:1(4mg:2mg)研制镍锰酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置1M NaPF6溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述镍锰酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a mass ratio of 2:1 (12mg:6mg), and LiNi 0.5 Mn 1.5 The mass ratio of O 4 and TAB was 2:1 (4mg:2mg) to develop lithium nickel manganese oxide positive electrode, and the positive and negative electrodes were pressed on the aluminum mesh at a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A 1M NaPF 6 solution was configured in a glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), and the above configured solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the lithium nickel manganese oxide and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging Long loop test.

实施例1Example 1

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)为2:1(12mg:6mg)研制活性炭负极,以LiMn2O4和TAB为2:1(4mg:2mg)研制锰酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置1M LiPF6溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述锰酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a ratio of 2:1 (12mg:6mg), and LiMn 2 O 4 and TAB The positive electrode of lithium manganate was developed for 2:1 (4mg:2mg), and the positive and negative electrodes were pressed on the aluminum mesh with a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A 1M LiPF 6 solution was configured in a glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), and the above configured solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the lithium manganate and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

实施例2Example 2

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)为2:1(12mg:6mg)研制活性炭负极,以LiMn2O4和TAB为2:1(4mg:2mg)研制锰酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=1:9(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述锰酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a ratio of 2:1 (12mg:6mg), and LiMn 2 O 4 and TAB The positive electrode of lithium manganate was developed for 2:1 (4mg:2mg), and the positive and negative electrodes were pressed on the aluminum mesh with a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A solution of [Na + ]/[Li + ]=1:9 (total 1M) was configured in the glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), The above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the lithium manganate and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

实施例3Example 3

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)为2:1(12mg:6mg)研制活性炭负极,以LiMn2O4和TAB为2:1(4mg:2mg)研制锰酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=3:7(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述锰酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a ratio of 2:1 (12mg:6mg), and LiMn 2 O 4 and TAB The positive electrode of lithium manganate was developed for 2:1 (4mg:2mg), and the positive and negative electrodes were pressed on the aluminum mesh with a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A solution of [Na + ]/[Li + ]=3:7 (total 1M) was configured in the glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), The above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the lithium manganate and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

实施例4Example 4

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)为2:1(12mg:6mg)研制活性炭负极,以LiMn2O4和TAB为2:1(4mg:2mg)研制锰酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=5:5(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述锰酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a ratio of 2:1 (12mg:6mg), and LiMn 2 O 4 and TAB The positive electrode of lithium manganate was developed for 2:1 (4mg:2mg), and the positive and negative electrodes were pressed on the aluminum mesh with a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A solution of [Na + ]/[Li + ]=5:5 (total 1M) was configured in the glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), The above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the lithium manganate and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

实施例5Example 5

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)为2:1(12mg:6mg)研制活性炭负极,以LiMn2O4和TAB为2:1(4mg:2mg)研制锰酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=7:3(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(他基本EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述锰酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a ratio of 2:1 (12mg:6mg), and LiMn 2 O 4 and TAB The positive electrode of lithium manganate was developed for 2:1 (4mg:2mg), and the positive and negative electrodes were pressed on the aluminum mesh with a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A solution of [Na + ]/[Li + ]=7:3 (total 1M) is configured in the glove box, wherein the solvent of the solution is a mixture of EC and EMC (other basic EC:EMC=3:7), The above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the lithium manganate and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

实施例6Example 6

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)为2:1(12mg:6mg)研制活性炭负极,以LiMn2O4和TAB为2:1(4mg:2mg)研制锰酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=9:1(总计1M)的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述锰酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a ratio of 2:1 (12mg:6mg), and LiMn 2 O 4 and TAB The positive electrode of lithium manganate was developed for 2:1 (4mg:2mg), and the positive and negative electrodes were pressed on the aluminum mesh with a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A solution of [Na + ]/[Li + ]=9:1 (total 1M) was configured in the glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), The above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the lithium manganate and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

实施例7Example 7

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)为2:1(12mg:6mg)研制活性炭负极,以LiMn2O4和TAB为2:1(4mg:2mg)研制锰酸锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置1M NaPF6溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述锰酸锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the activated carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at a ratio of 2:1 (12mg:6mg), and LiMn 2 O 4 and TAB The positive electrode of lithium manganate was developed for 2:1 (4mg:2mg), and the positive and negative electrodes were pressed on the aluminum mesh with a pressure of 4MPa, and dried in a vacuum tube furnace for 3h. A 1M NaPF 6 solution was configured in a glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), and the above configured solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the lithium manganate and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

实施例8Example 8

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)为2:1(12mg:6mg)研制活性炭负极,以LiFePO4和TAB为2:1(4mg:2mg)研制磷酸铁锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置1MLiPF6的溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述磷酸铁锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the active carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at 2:1 (12mg:6mg), and LiFePO 4 and TAB as 2 : 1 (4mg: 2mg) develop lithium iron phosphate positive electrode, and press positive and negative electrodes on aluminum mesh with 4MPa pressure, and dry in vacuum tube furnace for 3h. A solution of 1M LiPF6 was configured in the glove box, wherein the solvent of the solution was a mixture of EC and EMC (volume ratio EC:EMC=3:7), and the above configured solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the above-mentioned lithium iron phosphate and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

实施例9Example 9

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)为2:1(12mg:6mg)研制活性炭负极,以LiFePO4和TAB为2:1(4mg:2mg)研制磷酸铁锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=1:9(总计1M)的基溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述磷酸铁锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the active carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at 2:1 (12mg:6mg), and LiFePO 4 and TAB as 2 : 1 (4mg: 2mg) develop lithium iron phosphate positive electrode, and press positive and negative electrodes on aluminum mesh with 4MPa pressure, and dry in vacuum tube furnace for 3h. Configure a base solution of [Na + ]/[Li + ]=1:9 (1M in total) in the glove box, wherein the solvent of the solution is a mixture of EC and EMC (volume ratio EC:EMC=3:7) , the above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the above-mentioned lithium iron phosphate and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

实施例10Example 10

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)为2:1(12mg:6mg)研制活性炭负极,以LiFePO4和TAB为2:1(4mg:2mg)研制磷酸铁锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=3:7(总计1M)的基溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述磷酸铁锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the active carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at 2:1 (12mg:6mg), and LiFePO 4 and TAB as 2 : 1 (4mg: 2mg) develop lithium iron phosphate positive electrode, and press positive and negative electrodes on aluminum mesh with 4MPa pressure, and dry in vacuum tube furnace for 3h. Configure a base solution of [Na + ]/[Li + ]=3:7 (1M in total) in the glove box, wherein the solvent of the solution is a mixture of EC and EMC (volume ratio EC:EMC=3:7) , the above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the above-mentioned lithium iron phosphate and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

实施例11Example 11

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)为2:1(12mg:6mg)研制活性炭负极,以LiFePO4和TAB为2:1(4mg:2mg)研制磷酸铁锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=5:5(总计1M)的基溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述磷酸铁锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the active carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at 2:1 (12mg:6mg), and LiFePO 4 and TAB as 2 : 1 (4mg: 2mg) develop lithium iron phosphate positive electrode, and press positive and negative electrodes on aluminum mesh with 4MPa pressure, and dry in vacuum tube furnace for 3h. Configure a base solution of [Na + ]/[Li + ]=5:5 (total 1M) in the glove box, wherein the solvent of the solution is a mixture of EC and EMC (volume ratio EC:EMC=3:7) , the above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the above-mentioned lithium iron phosphate and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

实施例12Example 12

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)为2:1(12mg:6mg)研制活性炭负极,以LiFePO4和TAB为2:1(4mg:2mg)研制磷酸铁锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=7:3(总计1M)的基溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述磷酸铁锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the active carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at 2:1 (12mg:6mg), and LiFePO 4 and TAB as 2 : 1 (4mg: 2mg) develop lithium iron phosphate positive electrode, and press positive and negative electrodes on aluminum mesh with 4MPa pressure, and dry in vacuum tube furnace for 3h. Configure a base solution of [Na + ]/[Li + ]=7:3 (1M in total) in the glove box, wherein the solvent of the solution is a mixture of EC and EMC (volume ratio EC:EMC=3:7) , the above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the above-mentioned lithium iron phosphate and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

实施例13Example 13

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)为2:1(12mg:6mg)研制活性炭负极,以LiFePO4和TAB为2:1(4mg:2mg)研制磷酸铁锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置[Na+]/[Li+]=9:1(总计1M)的基溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述磷酸铁锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the active carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at 2:1 (12mg:6mg), and LiFePO 4 and TAB as 2 : 1 (4mg: 2mg) develop lithium iron phosphate positive electrode, and press positive and negative electrodes on aluminum mesh with 4MPa pressure, and dry in vacuum tube furnace for 3h. Configure a base solution of [Na + ]/[Li + ]=9:1 (total 1M) in the glove box, wherein the solvent of the solution is a mixture of EC and EMC (volume ratio EC:EMC=3:7) , the above prepared solution was left to stand in the glove box for 12 hours. Using the above solution as the electrolyte, using the above-mentioned lithium iron phosphate and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

实施例14Example 14

在研钵中,以YP-50F(超级电容器活性炭)和TAB(聚四氟乙烯/乙炔黑导电性粘结剂)为2:1(12mg:6mg)研制活性炭负极,以LiFePO4和TAB为2:1(4mg:2mg)研制磷酸铁锂正极,并将正、负极以4MPa压力压制在铝网上,并在真空管式炉中烘干3h。在手套箱中配置1MNaPF6的基溶液,其中,所述溶液的溶剂为EC和EMC(体积比EC:EMC=3:7)的混合物,将上述配置好的溶液在手套箱中静置12小时。以上述溶液为电解液,以上述磷酸铁锂、活性炭电极为正负极,在手套箱中制作扣式电池,隔膜为玻璃纤维;将扣式电池放置在室温下(22℃)进行充放电长循环测试。In a mortar, the active carbon negative electrode was prepared with YP-50F (supercapacitor activated carbon) and TAB (polytetrafluoroethylene/acetylene black conductive binder) at 2:1 (12mg:6mg), and LiFePO 4 and TAB as 2 : 1 (4mg: 2mg) develop lithium iron phosphate positive electrode, and press positive and negative electrodes on aluminum mesh with 4MPa pressure, and dry in vacuum tube furnace for 3h. Configure the base solution of 1MNaPF 6 in the glove box, wherein the solvent of the solution is a mixture of EC and EMC (volume ratio EC:EMC=3:7), and the above-mentioned configured solution is left to stand in the glove box for 12 hours . Using the above solution as the electrolyte, using the above-mentioned lithium iron phosphate and activated carbon electrodes as the positive and negative electrodes, make a button battery in a glove box with a glass fiber diaphragm; place the button battery at room temperature (22°C) for charging and discharging for a long time Cycle test.

对本发明上述对比例1~7制备的三电极体系进行分极电势测试,电流密度:100mAg–1,电压范围:0~2.7V,测试温度22℃;对本发明上述对比例8-14制备的扣式电池(LiCoO2-活性炭)进行充放电测试,电流密度:100mAg–1,电压范围:0~2.7V,测试温度:22℃;对本发明上述对比例15-21制备的扣式电池(LiNi0.5Mn1.5O4-活性炭)进行充放电测试,电流密度:100mAg–1,电压范围:0~3V,测试温度:22℃;对本发明上述实施例1~7制备的扣式电池(LiMn2O4-YP50F)进行充放电测试,电流密度:100mAg–1,电压范围:0~2.5V,测试温度22℃;对本发明上述实施例8~14制备的扣式电池(LiFePO4-活性炭)进行充放电测试,电流密度:100mAg–1,电压范围:0~2.7V,测试温度22℃;以上测试结果见图1~9。The three-electrode system prepared in the above-mentioned comparative examples 1 to 7 of the present invention was tested for polarization potential, the current density: 100mAg -1 , the voltage range: 0-2.7V, and the test temperature was 22°C; for the buttons prepared in the above-mentioned comparative examples 8-14 of the present invention Formula battery (LiCoO 2 -activated carbon) is charged and discharged tested, current density: 100mAg –1 , voltage range: 0~2.7V, test temperature: 22 ℃; Button battery (LiNi 0.5 Mn 1.5 O 4 -activated carbon) for charge and discharge test, current density: 100mAg -1 , voltage range: 0-3V, test temperature: 22°C; the button batteries (LiMn 2 O 4 -YP50F) for charge and discharge test, current density: 100mAg -1 , voltage range: 0-2.5V, test temperature 22°C; charge and discharge the button batteries (LiFePO 4 -activated carbon) prepared in the above-mentioned embodiments 8-14 of the present invention Test, current density: 100mAg -1 , voltage range: 0-2.7V, test temperature 22°C; the above test results are shown in Figures 1-9.

图1为本发明对比例1~7中所制备的三电极体系的分极电势曲线;由图1可知,随着电解质溶液中钠离子浓度发生改变,三电极的分极电势并无太大差别(误差在5%以内),说明在活性炭(YP-50F)一侧对锂、钠离子几乎无差别兼容,为之后的电池体系提供了理论支持。Fig. 1 is the polarization potential curve of the prepared three-electrode system in comparative example 1~7 of the present invention; As can be seen from Fig. 1, along with the sodium ion concentration in the electrolytic solution changes, the polarization potential of three electrodes does not have much difference (The error is within 5%), indicating that there is almost no difference in compatibility with lithium and sodium ions on the side of activated carbon (YP-50F), which provides theoretical support for the subsequent battery system.

图2、3为本发明对比例8-14中所制备的扣式电池的首圈充放电示意图和充、放电容量与循环圈数关系图,由图3可知,当电解液中钠离子浓度为10%时,在循环100圈后,LiCoO2-YP50F体系电池容量从140mAh g–1下降到20mAh g–1,容量衰减86%;图4、5为本发明对比例15-21中所制备的扣式电池的首圈充放电示意图和充、放电容量与循环圈数关系图,由图5可知,当电解液中钠离子浓度为50%时,在循环100圈后,LiNi0.5Mn1.5O4-YP50F电池容量从90mAh g–1下降到30mAh g–1,容量衰减67%,说明钴酸锂正极和镍锰酸锂正极的储钠能力较差;Fig. 2, 3 are the schematic diagrams of the first cycle charge and discharge of the button cell prepared in comparative examples 8-14 of the present invention and the relationship diagram between charge and discharge capacity and the number of cycles. As can be seen from Fig. 3, when the concentration of sodium ions in the electrolyte is At 10%, after 100 cycles, the battery capacity of LiCoO 2 -YP50F system drops from 140mAh g -1 to 20mAh g -1 , and the capacity fades by 86%; Figures 4 and 5 are the prepared in Comparative Examples 15-21 of the present invention The schematic diagram of the first charge and discharge cycle of the button battery and the relationship between the charge and discharge capacity and the number of cycles. It can be seen from Figure 5 that when the concentration of sodium ions in the electrolyte is 50%, after 100 cycles, LiNi 0.5 Mn 1.5 O 4 -YP50F battery capacity dropped from 90mAh g –1 to 30mAh g –1 , with a capacity decay of 67%, indicating that the lithium cobalt oxide positive electrode and lithium nickel manganese oxide positive electrode have poor sodium storage capacity;

图6、7分别为实施例1~7中所制备的扣式电池的首圈充放电示意图和充、放电容量与循环圈数关系图,由图6、7可以看出,当电解液中钠离子含量不大时,电池具有出色的循环性能:在循环100圈后依然保持有100mAh g–1的放电容量,说明锰酸锂正极具备一定的储钠能力,而当电解液中钠离子浓度达到一定程度(>50%)时,容量衰减明显,最终稳定在20mAh g–1左右,说明锰酸锂正极在低钠离子浓度下储钠能力良好。Figures 6 and 7 are respectively the schematic diagrams of the first cycle of charge and discharge of the button cells prepared in Examples 1 to 7 and the relationship diagrams between the charge and discharge capacity and the number of cycles. As can be seen from Figures 6 and 7, when the sodium in the electrolyte When the ion content is not large, the battery has excellent cycle performance: after 100 cycles, it still maintains a discharge capacity of 100mAh g -1 , indicating that the lithium manganate positive electrode has a certain sodium storage capacity, and when the concentration of sodium ions in the electrolyte reaches To a certain extent (>50%), the capacity fades obviously, and finally stabilizes at about 20mAh g -1 , indicating that the lithium manganese oxide cathode has a good sodium storage capacity under low sodium ion concentration.

图8、9分别为实施例8~14中所制备的扣式电池的首圈充放电示意图和充、放电容量与循环圈数关系图,由图8、9可以看出,当磷酸铁锂作为电池正极时,电池具有出色的循环性能,在电解液中钠离子含量为100%时,电池依然保持一定容量(60Ah g–1),并且在循环100周后容量依然保持在40mAh g–1以上,说明磷酸铁锂不仅可以储钠,而且作为正极材料具有卓越的循环性能。因此,以磷酸铁锂作为正极活性物质,活性炭(YP-50F)作为负极活性物质为例的可存储碱金属离子正极-高比表面积炭负极电池体系不仅具有极大的发展前景,并且具有良好的实用价值。Figures 8 and 9 are the schematic diagrams of the first cycle of charge and discharge of the button cells prepared in Examples 8 to 14, and the relationship diagrams between the charge and discharge capacity and the number of cycles. It can be seen from Figures 8 and 9 that when lithium iron phosphate is used as When the battery is positive, the battery has excellent cycle performance. When the sodium ion content in the electrolyte is 100%, the battery still maintains a certain capacity (60Ah g –1 ), and the capacity remains above 40mAh g –1 after 100 cycles. , indicating that lithium iron phosphate can not only store sodium, but also has excellent cycle performance as a cathode material. Therefore, the lithium iron phosphate as the positive electrode active material and activated carbon (YP-50F) as the negative electrode active material as an example can store alkali metal ion positive electrode-high specific surface area carbon negative electrode battery system not only has great development prospects, but also has good Practical value.

以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出,对于本技术领域的普通技术人员来说,在不脱离发明原理的前提下还可以对本发明进行若干改进和修饰,这些改进和修饰也落入本发明权利要求的保护范围内。The descriptions of the above embodiments are only used to help understand the method and core idea of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications can be made to the present invention without departing from the principles of the invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

对所公开的实施例的上述说明,使本领域专业技术人员能够实现和使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的,本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下,在其它实施例中实现。因此,本发明将不会被限制于本文所示的这些实施例,而是要符合本文所公开的原理和新颖特点相一致的最宽的范围。The above description of the disclosed embodiments is provided to enable any person skilled in the art to make and use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A battery system for evaluating the compatibility of positive electrode materials for storing lithium and sodium ions comprises a positive electrode, a negative electrode, a diaphragm between the positive electrode and the negative electrode and electrolyte; the positive electrode includes an active material that stores alkali metal ions; characterized in that the negative electrode comprises a high specific surface area carbon.
2. The battery system for evaluating the compatibility of a cathode material with lithium and sodium ions according to claim 1, wherein the specific surface area of the high specific surface area carbon is 10 to 3000m 2 /g。
3. The battery system for evaluating the compatibility of a positive electrode material with lithium and sodium ions according to claim 1, wherein said positive electrode comprises Lithium cobalt oxide (LiCoO) 2 ) Lithium manganate (LiMn) 2 O 4 ) Lithium nickel manganese (LiNi) 0.5 Mn 1.5 O 4 ) Or lithium iron phosphate (LiFePO) 4 ) An active material storing alkali metal ions.
4. The battery system for evaluating the compatibility of a positive electrode material for storing lithium and sodium ions according to any one of claims 1 to 3, wherein the positive electrode comprises an active material, a conductive agent, a binder and a current collector.
5. The battery system for evaluating the compatibility of a positive electrode material for storing lithium and sodium ions according to any one of claims 1 to 3, wherein the negative electrode comprises a high specific surface area carbon, a conductive agent, a binder and a current collector.
6. A battery system for evaluating the compatibility of a positive electrode material with lithium and sodium ions according to any one of claims 1 to 3, wherein the mass ratio of the carbon having a high specific surface area to the active material storing alkali metal ions is 1:1 to 1:5.
7. The battery system for evaluating the storage of lithium and sodium ions of a positive electrode material according to any one of claims 1 to 3, wherein the electrolyte comprises an electrolyte and an organic solvent, the electrolyte is a lithium salt, a sodium salt or a mixture of both, the organic solvent is one or more of carbonate, nitrile, sulfone, carboxylate and ether organic solvents, and the lithium salt is lithium hexafluorophosphate (LiPF 6 ) Lithium perchlorate (LiClO) 4 ) Or lithium bis (fluorosulfonyl) imide (LiSSI), the sodium salt is sodium hexafluorophosphate (NaPF) 6 ) Sodium perchlorate (NaClO) 4 ) Or sodium bis-fluorosulfonimide (NaFSI).
8. The battery system for evaluating the lithium and sodium ion storage compatibility of a positive electrode material according to claim 7, wherein the organic solvent is Ethylene Carbonate (EC) and ethylmethyl carbonate (EMC), EC: the volume ratio of EMC is 3:7.
9. The battery system for evaluating the lithium-sodium ion storage compatibility of a positive electrode material according to claim 7, wherein the total molar concentration of said electrolyte in the electrolyte solution is 0.1 to 3M.
10. A battery system for evaluating the storage of lithium and sodium ions of a positive electrode material according to any one of claims 1 to 3, wherein the material of the separator is glass fiber or a porous membrane of polyethylene or polypropylene.
CN202310135249.2A 2023-02-20 2023-02-20 Battery system for evaluating lithium ion and sodium ion storage compatibility of positive electrode material Pending CN116093255A (en)

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