WO2018113439A1 - Positive electrode material for lithium ion battery - Google Patents

Positive electrode material for lithium ion battery Download PDF

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Publication number
WO2018113439A1
WO2018113439A1 PCT/CN2017/110314 CN2017110314W WO2018113439A1 WO 2018113439 A1 WO2018113439 A1 WO 2018113439A1 CN 2017110314 W CN2017110314 W CN 2017110314W WO 2018113439 A1 WO2018113439 A1 WO 2018113439A1
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Prior art keywords
lithium ion
ion battery
additive
positive electrode
electrode material
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PCT/CN2017/110314
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French (fr)
Chinese (zh)
Inventor
王海波
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苏州格瑞动力电源科技有限公司
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Publication of WO2018113439A1 publication Critical patent/WO2018113439A1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection 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
    • H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention relates to a cathode material for a lithium ion battery.
  • lithium-containing transition metal oxides are generally used.
  • the lithium-containing transition metal oxide is lithium cobaltate (LiCoO 2 ), lithium nickelate (LiNiO 2 ), lithium manganate (LiMn 2 O 4 ), etc., in order to improve characteristics (high capacity, cycle characteristics, storage characteristics, and reduction)
  • the internal resistance, rate characteristics, and safety are being promoted to combine the lithium-containing transition metal oxides.
  • Lithium-ion batteries for large-scale applications such as in-vehicle use and load balancing are required to have different characteristics from those of lithium ion batteries for mobile phones or personal computers.
  • the object of the present invention is to provide a positive electrode material for a lithium ion battery, which aims to improve the performance of the lithium ion battery in the case of overdischarge and improve the safety of the lithium ion battery.
  • the technical solution of the present invention is to design a cathode material for a lithium ion battery, characterized in that: the cathode material of the lithium ion battery comprises an active material and an additive; and the additive is Li x Ni 1-xy M y O 2 ; wherein 0.3 ⁇ x ⁇ 0.85, 0.01 ⁇ y ⁇ 0.65.
  • M in the additive is at least one of Ti, Fe, and Cu.
  • the additive is one or more of Li 0.5 Ni 0.2 Ti 0.3 O 2 , Li 0.85 Ni 0.14 Fe 0.01 O 2 , Li 0.3 Ni 0.05 Cu 0.65 O 2 .
  • the additive content is not more than 10% by weight based on the percentage of the positive electrode material of the lithium ion battery.
  • the additive is a solid particle having a particle diameter of 1 to 5 um.
  • the active material is lithium iron phosphate.
  • the invention has the advantages and beneficial effects that the positive electrode material prepared by adding the additive can stabilize the negative electrode potential under the condition of overdischarge, so that the negative potential rises very slowly, and does not rapidly rise to the copper deposition potential to cause a short circuit. Prevent or delay the effect of overdischarge.
  • a cathode material for a lithium ion battery characterized in that: the cathode material of the lithium ion battery comprises an active material and an additive; and the additive is Li 0.5 Ni 0.2 Ti 0.3 O 2 .
  • the additive content is 5% by weight based on the percentage of the positive electrode material of the lithium ion battery.
  • the additive is a solid particle having a particle diameter of 2 um.
  • the active material is lithium iron phosphate.
  • a cathode material for a lithium ion battery characterized in that: the cathode material of the lithium ion battery comprises an active material and an additive; and the additive is Li 0.85 Ni 0.14 Fe 0.01 O 2 .
  • the additive content is 7 wt% based on the percentage of the positive electrode material of the lithium ion battery.
  • the additive is a solid particle having a particle diameter of 5 um.
  • the active material is lithium iron phosphate.
  • a cathode material for a lithium ion battery characterized in that: the cathode material of the lithium ion battery comprises an active material and an additive; and the additive is Li 0.3 Ni 0.05 Cu 0.65 O 2 .
  • the additive content is 10% by weight based on the percentage of the positive electrode material of the lithium ion battery.
  • the additive is a solid particle having a particle diameter of 5 um.
  • the active material is lithium iron phosphate.

Abstract

Disclosed is a positive electrode material for a lithium ion battery, comprising an active material and an additive, the additive being LixNi1-x-yMyO2, wherein 0.3 ≤ x ≤ 0.85, and 0.01 ≤ y ≤ 0.65. In the present invention, the positive electrode material for a lithium ion battery ensures that the lithium ion battery has a better performance under the conditions of over-discharging, and the safety of the lithium ion battery is improved.

Description

一种锂离子电池正极材料Lithium ion battery cathode material 技术领域Technical field
本发明涉及一种锂离子电池正极材料。The invention relates to a cathode material for a lithium ion battery.
背景技术Background technique
在锂离子电池的正极活性物质中，一般使用含锂过渡金属氧化物。具体地说，所述含锂过渡金属氧化物是钴酸锂(LiCoO2)、镍酸锂(LiNiO2)、锰酸锂(LiMn2O4)等，为了改善特性(高容量化、循环特性、保存特性、降低内部电阻、倍率特性)和提高安全性，正在推进将所述含锂过渡金属氧化物复合化。对于车载用和负载平衡用等大型用途中的锂离子电池，要求与至今为止的手机用或个人计算机用的锂离子电池不同的特性。Among the positive electrode active materials of lithium ion batteries, lithium-containing transition metal oxides are generally used. Specifically, the lithium-containing transition metal oxide is lithium cobaltate (LiCoO 2 ), lithium nickelate (LiNiO 2 ), lithium manganate (LiMn 2 O 4 ), etc., in order to improve characteristics (high capacity, cycle characteristics, storage characteristics, and reduction) The internal resistance, rate characteristics, and safety are being promoted to combine the lithium-containing transition metal oxides. Lithium-ion batteries for large-scale applications such as in-vehicle use and load balancing are required to have different characteristics from those of lithium ion batteries for mobile phones or personal computers.
发明内容Summary of the invention
本发明的目的在于提供一种锂离子电池正极材料，旨在使锂离子电池在过放电情况下有更好的性能，提高锂离子电池的安全性。The object of the present invention is to provide a positive electrode material for a lithium ion battery, which aims to improve the performance of the lithium ion battery in the case of overdischarge and improve the safety of the lithium ion battery.
为了实现上述目的，本发明的技术方案是设计一种锂离子电池正极材料，其特征在于：所述的锂离子电池正极材料包含活性材料和添加剂；所述的添加剂为LixNi1-x-yMyO2；其中0.3≤x≤0.85,0.01≤y≤0.65。In order to achieve the above object, the technical solution of the present invention is to design a cathode material for a lithium ion battery, characterized in that: the cathode material of the lithium ion battery comprises an active material and an additive; and the additive is Li x Ni 1-xy M y O 2 ; wherein 0.3≤x≤0.85, 0.01≤y≤0.65.
优选的，所述的添加剂中的M为Ti、Fe、Cu中的至少一种。Preferably, M in the additive is at least one of Ti, Fe, and Cu.
优选的，所述的添加剂为Li0.5Ni0.2Ti0.3O2、Li0.85Ni0.14Fe 0.01O2、Li0.3Ni0.05Cu0.65O2中的一种或多种。Preferably, the additive is one or more of Li 0.5 Ni 0.2 Ti 0.3 O 2 , Li 0.85 Ni 0.14 Fe 0.01 O 2 , Li 0.3 Ni 0.05 Cu 0.65 O 2 .
优选的，以锂离子电池正极材料的百分含量为基准，所述的添加剂含量不超过10wt％。Preferably, the additive content is not more than 10% by weight based on the percentage of the positive electrode material of the lithium ion battery.
优选的，所述的添加剂为固体颗粒，颗粒直径为1～5um。Preferably, the additive is a solid particle having a particle diameter of 1 to 5 um.
优选的，所述的活性材料为磷酸铁锂。Preferably, the active material is lithium iron phosphate.
本发明的优点和有益效果在于：本发明通过增加添加剂制得的正极材料，在过放电情况下可以稳定负极电位，使负电位上升很慢，不至于快速升到析铜电位导致短路，起到防止或者延缓过放电的作用。The invention has the advantages and beneficial effects that the positive electrode material prepared by adding the additive can stabilize the negative electrode potential under the condition of overdischarge, so that the negative potential rises very slowly, and does not rapidly rise to the copper deposition potential to cause a short circuit. Prevent or delay the effect of overdischarge.
具体实施方式detailed description
下面结合实施例，对本发明的具体实施方式作进一步描述。以下实施例仅用于更加清楚地说明本发明的技术方案，而不能以此来限制本发明的保护范围。The specific embodiments of the present invention are further described below in conjunction with the embodiments. The following examples are only intended to more clearly illustrate the technical solutions of the present invention, and are not intended to limit the scope of the present invention.
实施例1： Example 1:
一种锂离子电池正极材料，其特征在于：所述的锂离子电池正极材料包含活性材料和添加剂；所述的添加剂为Li0.5Ni0.2Ti0.3O2。A cathode material for a lithium ion battery, characterized in that: the cathode material of the lithium ion battery comprises an active material and an additive; and the additive is Li 0.5 Ni 0.2 Ti 0.3 O 2 .
以锂离子电池正极材料的百分含量为基准，所述的添加剂含量为5wt％。The additive content is 5% by weight based on the percentage of the positive electrode material of the lithium ion battery.
所述的添加剂为固体颗粒，颗粒直径为2um。The additive is a solid particle having a particle diameter of 2 um.
所述的活性材料为磷酸铁锂。The active material is lithium iron phosphate.
实施例2：Example 2:
一种锂离子电池正极材料，其特征在于：所述的锂离子电池正极材料包含活性材料和添加剂；所述的添加剂为Li0.85Ni0.14Fe 0.01O2。A cathode material for a lithium ion battery, characterized in that: the cathode material of the lithium ion battery comprises an active material and an additive; and the additive is Li 0.85 Ni 0.14 Fe 0.01 O 2 .
以锂离子电池正极材料的百分含量为基准，所述的添加剂含量为7wt％。The additive content is 7 wt% based on the percentage of the positive electrode material of the lithium ion battery.
所述的添加剂为固体颗粒，颗粒直径为5um。The additive is a solid particle having a particle diameter of 5 um.
所述的活性材料为磷酸铁锂。The active material is lithium iron phosphate.
实施例3：Example 3:
一种锂离子电池正极材料，其特征在于：所述的锂离子电池正极材料包含活性材料和添加剂；所述的添加剂为Li0.3Ni0.05Cu0.65O2。A cathode material for a lithium ion battery, characterized in that: the cathode material of the lithium ion battery comprises an active material and an additive; and the additive is Li 0.3 Ni 0.05 Cu 0.65 O 2 .
以锂离子电池正极材料的百分含量为基准，所述的添加剂含量为10wt％。The additive content is 10% by weight based on the percentage of the positive electrode material of the lithium ion battery.
所述的添加剂为固体颗粒，颗粒直径为5um。The additive is a solid particle having a particle diameter of 5 um.
所述的活性材料为磷酸铁锂。The active material is lithium iron phosphate.
以上所述仅是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。 The above description is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make several improvements and retouchings without departing from the technical principles of the present invention. It should also be considered as the scope of protection of the present invention.

Claims (6)

  1. 一种锂离子电池正极材料，其特征在于：所述的锂离子电池正极材料包含活性材料和添加剂；所述的添加剂为LixNi1-x-yMyO2；其中0.3≤x≤0.85,0.01≤y≤0.65。A cathode material for a lithium ion battery, characterized in that: the cathode material of the lithium ion battery comprises an active material and an additive; the additive is Li x Ni 1-xy M y O 2 ; wherein 0.3≤x≤0.85,0.01 ≤ y ≤ 0.65.
  2. 根据权利要求1所述的一种锂离子电池正极材料，其特征在于：所述的添加剂中的M为Ti、Fe、Cu中的至少一种。The cathode material for a lithium ion battery according to claim 1, wherein M in the additive is at least one of Ti, Fe, and Cu.
  3. 根据权利要求2所述的锂离子电池正极材料，其特征在于：所述的添加剂为Li0.5Ni0.2Ti0.3O2、Li0.85Ni0.14Fe0.01O2、Li0.3Ni0.05Cu0.65O2中的一种或多种。The cathode material for a lithium ion battery according to claim 2, wherein the additive is Li 0.5 Ni 0.2 Ti 0.3 O 2 , Li 0.85 Ni 0.14 Fe 0.01 O 2 , Li 0.3 Ni 0.05 Cu 0.65 O 2 One or more.
  4. 根据权利要求1所述的一种锂离子电池正极材料，其特征在于：以锂离子电池正极材料的百分含量为基准，所述的添加剂含量不超过10wt％。The positive electrode material for a lithium ion battery according to claim 1, wherein the additive content is not more than 10% by weight based on the percentage of the positive electrode material of the lithium ion battery.
  5. 根据权利要求1所述的一种锂离子电池正极材料，其特征在于：所述的添加剂为固体颗粒，颗粒直径为1～5um。The cathode material for a lithium ion battery according to claim 1, wherein the additive is a solid particle having a particle diameter of 1 to 5 um.
  6. 根据权利要求1所述的一种锂离子电池正极材料，其特征在于：所述的活性材料为磷酸铁锂。 The cathode material for a lithium ion battery according to claim 1, wherein the active material is lithium iron phosphate.
PCT/CN2017/110314 2016-12-19 2017-11-10 Positive electrode material for lithium ion battery WO2018113439A1 (en)

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CN201611174387.8 2016-12-19
CN201611174387.8A CN106410189A (en) 2016-12-19 2016-12-19 Lithium ion battery positive pole material

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CN106410189A (en) * 2016-12-19 2017-02-15 苏州格瑞动力电源科技有限公司 Lithium ion battery positive pole material

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103367729A (en) * 2012-04-02 2013-10-23 三星精密化学株式会社 Lithium ion secondary battery and method for preparing the same
CN103972503A (en) * 2014-04-02 2014-08-06 芜湖浙鑫新能源有限公司 Cathode material for lithium ion battery
CN106410189A (en) * 2016-12-19 2017-02-15 苏州格瑞动力电源科技有限公司 Lithium ion battery positive pole material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103367729A (en) * 2012-04-02 2013-10-23 三星精密化学株式会社 Lithium ion secondary battery and method for preparing the same
CN103972503A (en) * 2014-04-02 2014-08-06 芜湖浙鑫新能源有限公司 Cathode material for lithium ion battery
CN106410189A (en) * 2016-12-19 2017-02-15 苏州格瑞动力电源科技有限公司 Lithium ion battery positive pole material

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