CN115799611A - Sodium ion battery electrolyte and sodium ion battery - Google Patents
Sodium ion battery electrolyte and sodium ion battery Download PDFInfo
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- CN115799611A CN115799611A CN202310071316.9A CN202310071316A CN115799611A CN 115799611 A CN115799611 A CN 115799611A CN 202310071316 A CN202310071316 A CN 202310071316A CN 115799611 A CN115799611 A CN 115799611A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention discloses a sodium ion battery electrolyte and a sodium ion battery. The sodium ion battery electrolyte comprises: a fluorosulfonic acid silyl ester compound, sodium selenocyanate, sodium salt, a functional additive and an organic solvent; wherein the sodium salt comprises sodium bis (fluorosulfonyl) imide and sodium hexafluorophosphate; wherein the content of the fluorosulfonate silicate compound in the sodium-ion battery electrolyte is 0.1-5 wt%, the content of the sodium selenocyanate is 0.05-3 wt%, and the content of the sodium salt is 5-20wt%. The sodium ion battery electrolyte provided by the invention can give consideration to the low-temperature, high-temperature and rate performance of the sodium ion battery.
Description
Technical Field
The invention belongs to the technical field of sodium ion batteries, and particularly relates to a sodium ion battery electrolyte and a sodium ion battery.
Background
The lithium ion battery has high energy density and cycle performance, is widely applied to the fields of consumer electronics, electric automobiles, energy storage and the like, but with the gradual enlargement of the industrial scale, the lithium resource becomes the bottleneck limiting the development of the lithium ion battery, and the price of the lithium salt is high throughout the year, so that the development of the industry is severely limited. Under the background of such times, sodium ion batteries have attracted great attention in the industry, and the development of sodium ion batteries has great economic and social significance.
The global sodium content is 1300 times of that of lithium, sodium resources have the advantages of uniform distribution and low cost, the price is stable throughout the year, and the method is a breakthrough for breaking the predicament of energy industry on sodium resources, and in recent years, the materials, systems and terminal applications of sodium-ion batteries have breakthrough progress.
The layered oxide sodium electricity positive electrode material has a structure and a reaction mechanism similar to those of a sodium electricity ternary material, is considered to be one of the most promising sodium electricity positive electrode materials at present, is the main sodium electricity positive electrode material at present, but has strong oxidizability in a sodium removal state, and particularly at high temperature, an electrolyte is easy to generate side reaction on a positive electrode interface to generate a series of polymer byproducts and gas, so that the impedance is increased and the cycle performance is attenuated. On the other hand, the cathode material has strong reducibility, and the electrolyte can be continuously reduced and consumed at the cathode interface, so that the capacity attenuation is caused, therefore, how to improve the stability of the cathode material and the electrolyte interface is the key for improving the performance of the sodium-ion battery, and the provision of a new electrolyte is an effective way for solving the problem.
Disclosure of Invention
The invention mainly aims to provide a sodium ion battery electrolyte and a sodium ion battery so as to overcome the defects of the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:
the embodiment of the invention provides a sodium ion battery electrolyte, which comprises: a fluorosulfonic acid silyl ester compound, sodium selenocyanate, sodium salt, a functional additive and an organic solvent; wherein the sodium salt comprises sodium bis (fluorosulfonyl) imide and sodium hexafluorophosphate; wherein the content of the fluorosulfonate silicate compound in the sodium-ion battery electrolyte is 0.1-5 wt%, the content of the sodium selenocyanate is 0.05-3 wt%, and the content of the sodium salt is 5-20wt%.
The embodiment of the invention also provides application of the sodium ion battery electrolyte in preparation of a sodium ion battery.
The embodiment of the invention also provides a sodium ion battery, which comprises: the electrolyte is the sodium ion battery electrolyte.
Compared with the prior art, the invention has the beneficial effects that:
the sodium ion battery electrolyte provided by the invention can give consideration to the low-temperature high-temperature and rate performance of a sodium ion battery, and can improve low-temperature discharge, rate discharge, high-temperature circulation, high-temperature storage capacity recovery rate and inhibition of gas production to a certain extent by matching the fluorosulfonate silicate compound with sodium selenocyanate; after the functional additive is matched for use, the high-temperature cycle performance, the high-temperature storage capacity recovery rate and the gas production inhibition performance are further improved; after a proper amount of sodium bis (fluorosulfonyl) imide is introduced into the sodium salt, the low-temperature and rate performance of the sodium-ion battery can be further improved.
Detailed Description
In view of the defects of the prior art, the inventors of the present invention have made extensive studies and extensive practices to provide an electrolyte for a sodium-ion battery, which can improve the high-temperature performance of the battery and maintain the low-temperature and rate characteristics of the sodium-ion battery.
The technical solutions of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Specifically, as an aspect of the technical solution of the present invention, a sodium ion battery electrolyte solution includes: a fluorosulfonic acid silyl ester compound, sodium selenocyanate, sodium salt, a functional additive and an organic solvent; wherein the sodium salt comprises sodium bis (fluorosulfonyl) imide and sodium hexafluorophosphate; wherein the content of the fluorosulfonate silicate compound in the sodium-ion battery electrolyte is 0.1-5 wt%, the content of the sodium selenocyanate is 0.05-3 wt%, and the content of the sodium salt is 5-20wt%.
Specifically, the fluorosulfonic acid silicone ester compound and sodium selenocyanate are simultaneously introduced into the electrolyte, and can be matched to act on an electrode interface of the sodium ion battery, so that the high-temperature storage performance of the sodium ion battery can be remarkably improved, and the low-temperature performance of the battery can be improved.
Specifically, the sodium selenocyanate can improve high-temperature cycle stability, capacity retention and effectively inhibit gas generation.
In some preferred embodiments, the content of the fluorosulfonate silicone ester compound in the sodium-ion battery electrolyte is 0.1 to 3wt%, the content of the sodium selenocyanate is 0.05 to 2wt%, and the content of the sodium salt is 6 to 15wt%.
In some preferred embodiments, the organic solvent includes any one or a combination of two or more of ethylene carbonate, propylene carbonate, butylene carbonate, pentylene carbonate, fluoroethylene carbonate, ethylene difluorocarbonate, dimethyl carbonate, diethyl carbonate, dipropyl carbonate, ethyl methyl carbonate, methyl propyl carbonate, 1,4-butyrolactone, methyl formate, methyl acetate, methyl propionate, methyl butyrate, ethyl acetate, ethyl propionate, propyl propionate, ethyl butyrate, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, trimethyl phosphate, triethyl phosphate, tributyl phosphate, tri-trifluoromethyl phosphate, tri-hexafluoroisopropyl phosphate, and is not limited thereto.
In some preferred embodiments, the fluorosulfonate silyl ester compound has a structure as shown in formula (I):
formula (I)
Wherein R is 1 ~R 3 Each independently selected from alkyl with 1~5, unsaturated alkyl with 2~5, alkoxy with 1~5, F, cyano and sulfonic group, or partially or completely substituted by one or more ofThe sub number is 1~5 alkane, one or more of F, cyano and sulfonic groups are partially or completely substituted unsaturated alkyl with 2~5 carbon atoms, or one or more of F, cyano and sulfonic groups are partially or completely substituted alkane with 1~5 carbon atoms.
In some preferred embodiments, the fluorosulfonate compound includes any one or a combination of two or more of trimethylsilyl fluorosulfonate, dimethylethylsilyl fluorosulfonate, methyldiethylsilyl fluorosulfonate, triethylsilyl fluorosulfonate, dimethyltrifluoromethylsilyl fluorosulfonate, methyldietrifluoromethylsilyl fluorosulfonate, trifluoromethylsilyl fluorosulfonate, and dimethylcyanosilyl fluorosulfonate, and is not limited thereto.
Specifically, the fluorosulfonic acid silicone ester compound includes fluorosulfonic acid trimethylsilyl ester (denoted as A1), fluorosulfonic acid dimethylethyl silicone ester (denoted as A2), fluorosulfonic acid methyldiethyl silicone ester (denoted as A3), fluorosulfonic acid triethylsilicone ester (denoted as A4), fluorosulfonic acid dimethyltrifluoro methyl silicone ester (denoted as A5), fluorosulfonic acid methyldditrifluoromethyl silicone ester (denoted as A6), fluorosulfonic acid tritrifluoromethyl silicone ester (denoted as A7), and fluorosulfonic acid dimethylnitrilyl silicone ester (denoted as A8), and the structural formulas of the fluorosulfonic acid trimethylsilyl ester are as follows:
further, when the fluorosulfonic acid silicone ester compound is selected from one or a combination of two or more of fluorosulfonic acid trimethylsilyl ester (represented as A1), fluorosulfonic acid tritrifluoromethyl silicone ester (represented as A7) and fluorosulfonic acid dimethyl nitrile silicone ester (represented as A8), the sodium-ion battery electrolyte has more balanced performance.
In some preferred embodiments, the functional additive comprises any one or a combination of two or more of vinylene carbonate (denoted B1), vinyl ethylene carbonate (denoted B2), fluoroethylene carbonate (denoted B3), 1,3-propanesultone (denoted B4), 1,3-propene sultone (denoted B5), 1,4-butane sultone (denoted B6), vinyl sulfite (denoted B7), vinyl sulfate (denoted B8), propylene sulfate (denoted B9), tris (trimethylsilane) phosphate (denoted B10), and tris (trimethylsilane) borate (denoted B11), and is not limited thereto.
Specifically, the functional additive disclosed by the invention is matched with a fluorosulfonate silicate compound and sodium selenocyanate for use, so that the cycle performance and the high-temperature storage performance of the sodium-ion battery can be improved.
In some preferred embodiments, the content of the functional additive in the sodium-ion battery electrolyte is 0.1 to 5wt%.
In some preferred embodiments, the mass ratio of sodium bis-fluorosulfonylimide to sodium hexafluorophosphate in said sodium salt is in the range of 1: more than 20.
Further, the mass ratio of sodium bis (fluorosulfonyl) imide to sodium hexafluorophosphate in the sodium salt is 1:7 or more.
Further, the content of the functional additive in the sodium-ion battery electrolyte is 0.1-3wt%.
In another aspect of the embodiment of the invention, the application of the sodium-ion battery electrolyte in preparing a sodium-ion battery is also provided.
According to the invention, the sodium ion battery is prepared by adopting the sodium ion battery electrolyte, on one hand, CN group in sodium selenocyanate in the sodium ion battery electrolyte can complex transition metal ions of a positive electrode, so that the dissolution and deposition of the metal ions are inhibited, the high-temperature performance of the battery is improved, and the gas generation is inhibited; on the other hand, the fluorosulfonate silyl ester compound is decomposed in the electrolyte to form a low-impedance interface film on the negative electrode, and Se generated by decomposition in sodium selenocyanate may participate in film formation of the negative electrode, so that the power characteristics of the sodium ion battery are improved cooperatively.
Another aspect of an embodiment of the present invention also provides a sodium ion battery including: the electrolyte is the sodium ion battery electrolyte.
In some preferred embodiments, the positive electrode includes a positive electrode current collector, and a positive electrode film layer including a positive electrode active material attached to one or both surfaces of the positive electrode current collector.
Further, the positive electrode active material hasSome have the general chemical formula: naA x B y C z D (1-x-y-x) O 2 Wherein A, B, C, D is independently selected from one of Co, ni, cu, mn and Fe, x is not less than 0<1，0≤y<1，0≤z<1，0<x+y+z≤1。
In some preferred embodiments, the negative electrode includes a negative electrode current collector, and a negative electrode film layer including a negative electrode active material attached to one or both sides of the negative electrode current collector.
Further, the negative active material includes metallic sodium and/or a sodium insertion compound material, for example, the negative active material includes one or a combination of two or more of soft carbon, hard carbon, sodium titanate, metallic sodium, and sodium alloy.
The technical solution of the present invention is further described in detail with reference to several preferred embodiments, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are given, but the scope of the present invention is not limited to the following embodiments.
The experimental materials used in the examples used below were all available from conventional biochemical reagents companies, unless otherwise specified.
Example 1
A sodium ion battery electrolyte comprising: sodium selenocyanate, fluorosulfonic acid silyl ester compound is fluorosulfonic acid tritrifluoromethylsilyl ester A7, sodium salt is sodium hexafluorophosphate NaPF 6 And sodium bis (fluorosulfonyl) imide NaFSI, wherein the sodium salt content is 14wt%, the functional additive is ethylene sulfate B1, the organic solvent is a mixture of ethylene carbonate EC, propylene carbonate PC and ethyl methyl carbonate EMC, and the use amounts of the components are shown in Table 1.
Examples 2 to 19
The components and contents of the sodium ion battery electrolyte are shown in table 1.
Comparative examples 1 to 8
The components and contents of the sodium ion battery electrolyte are shown in table 1.
TABLE 1 electrolytes for sodium ion batteries in examples 1-19 and comparative examples 1-8
The sodium ion battery electrolyte is applied to a battery for characterization: the electrolyte solutions in the above-described examples and comparative examples were assembled into a sodium ion battery, and the performance of the electrolyte solution was reflected by measuring the performance of the sodium ion battery.
Preparation of sodium ion battery
Preparation of positive plate
Mixing the positive active material of nickel-iron-manganese-sodium (NaNi) 0.33 Fe 0.33 Mn 0.33 O 2 ) And mixing polyvinylidene fluoride (PVDF) serving as a binder and acetylene black Super-P serving as a conductive agent according to a mass ratio of 96.5. And (3) uniformly coating the slurry on an aluminum foil, drying in a forced air oven at 130 ℃, and then performing cold pressing and slitting to obtain the positive plate.
Preparation of cathode plate
Mixing a negative electrode active material hard carbon, a binder Polyacrylonitrile (PAA), a thickener carboxymethylcellulose sodium (CMC) and a conductive agent acetylene black Super-P according to a mass ratio of 96.5. And uniformly coating the slurry on an aluminum foil with the thickness of 12 mu m, drying in a blast oven at 120 ℃, and then carrying out cold pressing and slitting to obtain the negative plate.
Assembling the positive plate, the negative plate and the isolating film to obtain a battery core, putting the battery core into an aluminum plastic film shell, injecting electrolyte, sealing, standing, forming, exhausting, final sealing, capacity grading and the like to obtain the sodium ion battery.
Performance testing of sodium ion batteries
Testing of cycle performance of sodium ion battery
Charging the sodium ion battery to 4.0V at 45 ℃ by a constant current of 1C, charging at constant voltage until the current is less than or equal to 0.05C, and then discharging to 1.5V by a constant current of 1C, wherein the charge-discharge cycle is described above. Then 500 cycles were performed according to the above conditions. Capacity retention (%) of the sodium-ion battery after n cycles (= discharge capacity at n-th cycle/first discharge capacity) × 100%, wherein n is the cycle number of the sodium-ion battery.
High temperature storage performance test of sodium ion battery
Charging the sodium ion battery to 4.0V at 25 ℃ by a constant current of 1C, then charging at constant voltage until the current is less than or equal to 0.05C, discharging to 1.5V by 1C, and recording the discharge capacity C of the sodium ion battery 0 Charging to 4.0V with 1C constant current, charging to current less than or equal to 0.05C with constant voltage, placing the sodium ion battery into a thermostat at 55 ℃ after full charge, storing for n days, and testing recoverable capacity C of the battery by standard charging and discharging process n . Capacity recovery rate (%) = C after sodium ion battery is stored for n days at 55 DEG C n /C 0 Gamma 100%, wherein n is the number of days of storage of the sodium ion battery at 55 ℃.
Charging the sodium ion battery to 4.0V at room temperature at a constant current of 1C, then charging at constant voltage until the current is less than or equal to 0.05C, and testing the volume of the sodium ion battery to be V 0 (ii) a Then the sodium ion battery is placed into a constant temperature box at 70 ℃, stored for 7 days, and the volume of the sodium ion battery taken out and tested on the nth day is recorded as V n . Volume expansion rate (%) of sodium ion battery after storage for n days at 70 ℃ = (V) n -V 0 ）/V 0 Gamma 100%, wherein n is the number of days of storage of the sodium-ion battery at 70 ℃.
Rate capability test of sodium ion battery
Charging the sodium ion battery to 4.0V at 25 ℃ by a constant current of 1C, then charging at constant voltage until the current is less than or equal to 0.05C, standing for 30min, discharging to 1.5V by a constant current of 1C, recording the discharge capacity of the sodium ion battery, and recording the discharge capacity as C0; charging sodium ion battery at 25 deg.C with 1C constant current to 4.0V, then charging at constant voltage to current less than or equal to 0.05C, standing for 30min, discharging with 5C current to 1.5V, and recording discharge capacity C 5C Then, 5C rate discharge capacity retention (%) = C 5C /C 0 *100%。
Low temperature performance testing of sodium ion batteries
Sodium ion battery is arranged at 25 DEG CCharging to 4.0V at 1C constant current, then charging at constant voltage until the current is less than or equal to 0.05C, standing for 60min, discharging to 1.5V at 1C constant current, recording the discharge capacity of the sodium-ion battery, and recording the discharge capacity as C 0 (ii) a Charging sodium ion battery at 25 deg.C with 1C constant current to 4.0V, then charging at constant voltage to current less than or equal to 0.05C, standing for 60min, discharging at-20 deg.C with 1C current to 1.5V, and recording discharge capacity C -20 Then the discharge capacity retention (%) at-20 ℃ is (%) = C -20 /C 0 *100%。
The results of the performance test of the above sodium battery are shown in table 2.
TABLE 2 Performance of sodium ion batteries prepared from the electrolytes of sodium ion batteries of examples 1-19 and comparative examples 1-8
Compared with comparative example 1, comparative example 2, comparative example 3 and example 1, when the additive A7 is used alone, the low-temperature performance of the battery can be improved remarkably, the cycle at 45 ℃ is improved, the storage volume expansion at 70 ℃ is improved to a certain extent, and the recovery rate of the storage capacity at 55 ℃ is deteriorated; when the sodium selenocyanate is used alone, the recovery rate of high-temperature circulation and high-temperature storage capacity and gas production are obviously improved, but the improvement on low-temperature and rate performance is not obvious; however, when A7 is combined with sodium selenocyanate, the low temperature and rate and high temperature circulation have superimposed improvement effects, and the high temperature storage shows synergistic improvement, which shows that the two have certain interaction, and the addition of A7 on the basis of sodium selenocyanate can improve the low temperature performance and simultaneously show the improvement on the high temperature storage performance.
The introduction of B8 can significantly improve cycle performance and high-temperature storage capacity retention rate and volume expansion rate, compared to example 1 and example 2, but slightly deteriorates low-temperature performance of the battery.
Comparing example 2 and example 3, comparative example 4 and comparative example 7, comparative example 5 and comparative example 6, the introduction of NaFSI can significantly improve low and high temperature performance because the use of NaFSI can improve the high temperature stability of the electrolyte and the ionic conductivity at low temperatures. By combining the examples 11, 12 and 13, the improvement of the NaFSI content (NaFSI/NaPF 6 is more than or equal to 0.2/0.8) can obviously improve the low-temperature and rate performance of the battery, but the improvement of the high-temperature cycle and storage performance is reduced when the NaFSI content is further improved.
In comparative example 3, example 4 and example 5, when the content of A7 was increased to 0.5% and 1%, the low temperature performance was slightly improved, but the high temperature cycle and the high temperature storage capacity recovery rate and gas evolution rate were slightly deteriorated.
Compared with the additives A8, A4 and A1, the additive A7 of the comparative example 3, the example 6, the example 7 and the example 8 show more balanced performance, and the A8 has more obvious effect on inhibiting gas generation but has smaller effect on improving low-temperature and rate performance.
In comparative example 3, example 9 and example 10, the content of sodium selenocyanate was 0.05%, 0.2% and 2%, respectively, which showed improvement in performance.
The performance of comparative example 3, example 14, example 15, example 16 and example 17 can be improved to a certain extent by introducing additives such as B1, B4, B6, B11 and the like into the mixture and using the mixture together with B8.
Comparing example 3 and example 18, the combination of A2, B2 additives can significantly improve the high temperature performance of the battery, but significantly worsen the low temperature and rate performance. Comparing example 3 with example 19, the use of additives A3 and B3 provides some improvement in cycle but worsens high temperature performance storage and gassing.
In addition, the inventors of the present invention have also made experiments with other materials, process operations, and process conditions described in the present specification with reference to the above examples, and have obtained preferable results.
It should be understood that the technical solution of the present invention is not limited to the above-mentioned specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention without departing from the spirit of the present invention and the protection scope of the claims.
Claims (10)
1. A sodium ion battery electrolyte, comprising: a fluorosulfonic acid silyl ester compound, sodium selenocyanate, sodium salt, a functional additive and an organic solvent; wherein the sodium salt comprises sodium bis (fluorosulfonyl) imide and sodium hexafluorophosphate; wherein the content of the fluorosulfonate silicate compound in the sodium-ion battery electrolyte is 0.1-5 wt%, the content of the sodium selenocyanate is 0.05-3 wt%, and the content of the sodium salt is 5-20wt%.
2. The sodium ion battery electrolyte of claim 1, wherein: the content of the fluorosulfonic acid silicone ester compound in the sodium-ion battery electrolyte is 0.1-3wt%, the content of the sodium selenocyanate is 0.05-2wt%, and the content of the sodium salt is 6-15wt%.
3. The sodium ion battery electrolyte of claim 1, wherein: the functional additive comprises any one or the combination of more than two of vinylene carbonate, ethylene carbonate, fluoroethylene carbonate, 1,3-propane sultone, 1,3-propylene sultone, 1,4-butane sultone, ethylene sulfite, ethylene sulfate, propylene sulfate, tri (trimethylsilyl) phosphate and tri (trimethylsilyl) borate;
and/or the organic solvent comprises any one or the combination of more than two of ethylene carbonate, propylene carbonate, butylene carbonate, pentylene carbonate, fluoroethylene carbonate, difluoroethylene carbonate, dimethyl carbonate, diethyl carbonate, dipropyl carbonate, ethyl methyl carbonate, methyl propyl carbonate, 1,4-butyrolactone, methyl formate, methyl acetate, methyl propionate, methyl butyrate, ethyl acetate, ethyl propionate, propyl propionate, ethyl butyrate, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, trimethyl phosphate, triethyl phosphate, tributyl phosphate, tri-trifluoromethyl phosphate and tri-hexafluoroisopropyl phosphate.
4. The sodium ion battery electrolyte of claim 1, wherein the fluorosulfonate silicone ester compound has a structure according to formula (I):
formula (I)
Wherein R is 1 ~R 3 The alkyl group is selected from alkyl group with 1~5, unsaturated alkyl group with 2~5, alkoxy group with 1~5, one or more of F, cyano and sulfonic group, which are partially or completely substituted, alkyl group with 1~5, one or more of F, cyano and sulfonic group, which are partially or completely substituted, unsaturated alkyl group with 2~5, or alkyl group with 1~5, which is partially or completely substituted, respectively;
and/or the fluorosulfonic acid silicone ester compound comprises one or a combination of more than two of fluorosulfonic acid trimethyl silicone ester, fluorosulfonic acid dimethyl ethyl silicone ester, fluorosulfonic acid methyl diethyl silicone ester, fluorosulfonic acid triethyl silicone ester, fluorosulfonic acid dimethyl trifluoromethyl silicone ester, fluorosulfonic acid methyl ditrifluoromethyl silicone ester, fluorosulfonic acid trifluoro methyl silicone ester and fluorosulfonic acid dimethyl nitrile silicone ester.
5. The sodium ion battery electrolyte of claim 4, wherein: the fluorosulfonic acid silicone ester compound comprises one or a combination of more than two of fluorosulfonic acid trimethylsilyl ester, fluorosulfonic acid trifluoro-methyl silicone ester and fluorosulfonic acid dimethyl nitrile-based silicone ester.
6. The sodium ion battery electrolyte of claim 1, wherein: the content of the functional additive in the sodium-ion battery electrolyte is 0.1 to 5wt%;
and/or the mass ratio of the sodium bis (fluorosulfonyl) imide to the sodium hexafluorophosphate in the sodium salt is 1: more than 20.
7. The sodium ion battery electrolyte of claim 6, wherein: the content of the functional additive in the sodium-ion battery electrolyte is 0.1-3wt%.
8. Use of the sodium ion battery electrolyte of any one of claims 1-7 in the manufacture of a sodium ion battery.
9. A sodium-ion battery characterized by comprising: a positive electrode, a negative electrode, and an electrolyte solution, wherein the electrolyte solution is the sodium-ion battery electrolyte solution according to any one of claims 1 to 7.
10. The sodium-ion battery of claim 9, wherein: the positive electrode comprises a positive electrode current collector and a positive electrode film layer which is attached to one surface or two surfaces of the positive electrode current collector and contains a positive electrode active substance;
and/or the negative electrode comprises a negative electrode current collector and a negative electrode film layer which is attached to one surface or two surfaces of the negative electrode current collector and contains a negative electrode active material.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4279976A (en) * | 1980-07-07 | 1981-07-21 | Exxon Research & Engineering Co. | Pseudohalide-containing salts for electrolytes of alkali-metal electrochemical devices |
| US20150064574A1 (en) * | 2013-08-30 | 2015-03-05 | Hui He | Non-flammable quasi-solid electrolyte and non-lithium alkali metal or alkali-ion secondary batteries containing same |
| CN105826596A (en) * | 2015-01-22 | 2016-08-03 | 微宏动力系统（湖州）有限公司 | Preparation method for ionic liquid and secondary battery |
| US20200075952A1 (en) * | 2018-09-04 | 2020-03-05 | The Chinese University Of Hong Kong | Complexed Iodine-Based Electrolyte and Redox Flow Battery Comprising the Same |
| CN113451650A (en) * | 2021-06-28 | 2021-09-28 | 万向一二三股份公司 | Electrolyte for lithium battery and lithium ion battery |
| US20210344038A1 (en) * | 2020-04-29 | 2021-11-04 | Global Graphene Group, Inc. | Method of producing non-flammable quasi-solid electrolyte and a quasi-solid electrolyte/separator layer for use in a lithium battery |
| CN114824270A (en) * | 2022-04-13 | 2022-07-29 | 阳光储能技术有限公司 | Lithium metal negative electrode and lithium metal battery |
| CN115395102A (en) * | 2022-09-30 | 2022-11-25 | 珠海冠宇电池股份有限公司 | Electrolyte and battery |
-
2023
- 2023-02-07 CN CN202310071316.9A patent/CN115799611B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4279976A (en) * | 1980-07-07 | 1981-07-21 | Exxon Research & Engineering Co. | Pseudohalide-containing salts for electrolytes of alkali-metal electrochemical devices |
| US20150064574A1 (en) * | 2013-08-30 | 2015-03-05 | Hui He | Non-flammable quasi-solid electrolyte and non-lithium alkali metal or alkali-ion secondary batteries containing same |
| CN105826596A (en) * | 2015-01-22 | 2016-08-03 | 微宏动力系统（湖州）有限公司 | Preparation method for ionic liquid and secondary battery |
| US20200075952A1 (en) * | 2018-09-04 | 2020-03-05 | The Chinese University Of Hong Kong | Complexed Iodine-Based Electrolyte and Redox Flow Battery Comprising the Same |
| US20210344038A1 (en) * | 2020-04-29 | 2021-11-04 | Global Graphene Group, Inc. | Method of producing non-flammable quasi-solid electrolyte and a quasi-solid electrolyte/separator layer for use in a lithium battery |
| CN113451650A (en) * | 2021-06-28 | 2021-09-28 | 万向一二三股份公司 | Electrolyte for lithium battery and lithium ion battery |
| CN114824270A (en) * | 2022-04-13 | 2022-07-29 | 阳光储能技术有限公司 | Lithium metal negative electrode and lithium metal battery |
| CN115395102A (en) * | 2022-09-30 | 2022-11-25 | 珠海冠宇电池股份有限公司 | Electrolyte and battery |
Non-Patent Citations (2)
| Title |
|---|
| ANG FU等: "Synergistical Stabilization of Li Metal Anodes and LiCoO2 Cathodes in High-Voltage Li∥LiCoO2 Batteries by Potassium Selenocyanate (KSeCN) Additive" * |
| K. FIC等: "Selenocyanate-based ionic liquid as redox-active electrolyte for hybrid electrochemical capacitors" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117613388A (en) * | 2024-01-19 | 2024-02-27 | 湖州超钠新能源科技有限公司 | Electrolyte and sodium ion battery |
| CN117613388B (en) * | 2024-01-19 | 2024-05-07 | 湖州超钠新能源科技有限公司 | Electrolyte and sodium ion battery |
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| CN115799611B (en) | 2023-04-25 |
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