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WO2018097523A1 - Solution électrolytique pour batterie secondaire et batterie secondaire comprenant ladite solution électrolytique - Google Patents

Solution électrolytique pour batterie secondaire et batterie secondaire comprenant ladite solution électrolytique Download PDF

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Publication number
WO2018097523A1
WO2018097523A1 PCT/KR2017/012702 KR2017012702W WO2018097523A1 WO 2018097523 A1 WO2018097523 A1 WO 2018097523A1 KR 2017012702 W KR2017012702 W KR 2017012702W WO 2018097523 A1 WO2018097523 A1 WO 2018097523A1
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WIPO (PCT)
Prior art keywords
carbonate
secondary battery
lithium
electrolyte
formula
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2017/012702
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English (en)
Korean (ko)
Inventor
방지민
신정주
고종관
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SK Chemicals Co Ltd
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SK Chemicals Co Ltd
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Publication date
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Publication of WO2018097523A1 publication Critical patent/WO2018097523A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0567—Liquid materials characterised by the additives
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0568—Liquid materials characterised by the solutes
    • 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
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0569—Liquid materials characterised by the solvents
    • 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
    • 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
    • H01M2300/00—Electrolytes
    • H01M2300/0017—Non-aqueous electrolytes
    • H01M2300/0025—Organic electrolyte
    • 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 present invention relates to a secondary battery electrolyte comprising a glyoxal sulfate and difluorophosphate and a secondary battery comprising the same, the secondary battery has excellent output characteristics and capacity characteristics at high temperature storage, and exhibits improved high temperature life characteristics. .
  • lithium secondary batteries having high energy density, excellent lifespan characteristics, and low self discharge rate have been commercialized and widely used.
  • the lithium secondary battery is composed of a negative electrode such as a carbon material that occludes and releases lithium ions, a positive electrode made of a lithium-containing oxide, and the like, and a non-aqueous electrolyte solution in which lithium salt is dissolved in an appropriate amount.
  • a number of additives and electrolyte composition techniques are added to improve the output stability of the non-aqueous electrolyte.
  • a number of additives and electrolyte composition techniques are known that form a high quality film (solid electrolyte interface) on the positive electrode and the negative electrode to improve the capacity storage characteristics of the secondary battery.
  • Japanese Patent No. 3439085 discloses an additive for a secondary battery including lithium fluorophosphate or lithium difluorophosphate.
  • the registered patent discloses that a lithium fluorophosphate or lithium difluorophosphate additive reacts with lithium to form a good film at the interface between the positive electrode and the negative electrode, and the film inhibits direct contact between the active material and the organic solvent in a non-aqueous system.
  • disassembly of electrolyte solution is disclosed.
  • the registered patent discloses that the storage characteristics are improved by suppressing self discharge of the battery when the secondary battery is stored for a predetermined period after charging of the secondary battery.
  • lithium fluorophosphate or lithium difluorophosphate can improve the storage characteristics and lifespan characteristics of the secondary battery to some extent, there was a lack of long-term storage or lifetime characteristics of the battery at high temperatures.
  • the registered patent does not disclose that the high output characteristics of the secondary battery including lithium fluorophosphate or lithium difluorophosphate is improved.
  • an object of the present invention is to include an additive for forming a more dense coating on the negative electrode of the secondary battery, the secondary battery electrolyte excellent in the output characteristics and capacity characteristics during high temperature storage, and at the same time improve the high temperature life characteristics and It is to provide a secondary battery including the same.
  • the present invention to achieve the above object
  • the present invention provides a secondary battery comprising the secondary battery electrolyte.
  • the electrolyte solution for a secondary battery of the present invention forms a stable film on the positive electrode and the negative electrode of the secondary battery, thereby improving output characteristics and capacity characteristics during high temperature storage of the secondary battery, and at the same time, improving the high temperature life characteristics of the battery.
  • the secondary battery electrolyte of the present invention is a carbonate solvent; Lithium salts; A compound of Formula 1; And lithium difluorophosphate (LiPO 2 F 2 ).
  • the compound of formula 1 is a known compound (CAS No. 496-45-7), bicyclo-glyoxal sulfate, glyoxal sulfate, or 3a, 6a-dihydro- [1,3,2] dioxathiolo [4,5-d] [1,3,2] dioxathiol 2,2,5,5-tetraoxide (3a, 6a-dihydro- [1,3, 2] dioxathiolo [4,5-d] [1,3,2] dioxathiole 2,2,5,5-tetraoxide), etc., and can be purchased commercially.
  • the compound of Formula 1 may be prepared by a known synthesis method, for example, by reacting sulfuric acid with 1,1,2,2-tetrachloroethane as a starting material (US Patent No. 1,999,995 and US Patent Registration). 2,415,397).
  • lithium difluorophosphate (CAS No. 845910-47-6, difluorophosphate lithium) is a commercially available compound and can be purchased commercially or prepared by known synthetic methods.
  • the electrolyte may include 0.1 to 10% by weight of the compound of Formula 1 and 0.05 to 10% by weight of lithium difluorophosphate relative to the total weight.
  • the electrolyte solution is 0.1 to 8% by weight, 0.2 to 5% by weight, or 0.5 to 3% by weight of the compound of Formula 1; And 0.05-8%, 0.1-5%, or 0.2-2% by weight of lithium difluorophosphate.
  • the compound of Formula 1 is included in an amount within the content range
  • the secondary battery including the electrolyte of the present invention has an effect of suppressing an increase in resistance in a high temperature environment and an excessive improvement of initial resistance at room temperature.
  • the electrode surface of the secondary battery is coated with an appropriate thickness, it is possible to prevent an increase in the resistance of the secondary battery.
  • the carbonate solvent has high solubility in the lithium salt, the compound of Formula 1, and lithium difluorophosphate.
  • the carbonate solvent is diethyl carbonate (DEC), ethylmethyl carbonate (EMC), dimethyl carbonate (DMC), dipropyl carbonate (DPC), methylpropyl carbonate (methylpropyl carbonate; MPC), ethylpropyl carbonate (EPC), ethylene carbonate (EC), propylene carbonate (PC), butylene carbonate (BC), propyl propionate ( It may be at least one selected from the group consisting of propyl propionate (PP) and fluoroethylene carbonate (FEC).
  • the electrolyte is a carbonate solvent, diethyl carbonate (DEC), ethyl methyl carbonate (EMC), dimethyl carbonate (DMC), dipropyl carbonate (DPC), methylpropyl carbonate (MPC) and ethylpropyl carbonate (EPC
  • DEC diethyl carbonate
  • EMC ethyl methyl carbonate
  • DMC dimethyl carbonate
  • DPC dipropyl carbonate
  • MPC methylpropyl carbonate
  • EPC methylpropyl carbonate
  • EPC methylpropyl carbonate
  • EPC methylpropyl carbonate
  • EPC methylpropyl carbonate
  • EPC methylpropyl carbonate
  • EPC methylpropyl carbonate
  • MPC methylpropyl carbonate
  • EPC methylpropyl carbonate
  • EPC methylpropyl carbonate
  • EPC methylpropyl carbonate
  • EPC methylpropyl carbonate
  • the carbonate solvent may be dehydrated, and specifically, the carbonate solvent may include water of 30 ppm by weight or less.
  • the lithium salt is not particularly limited as long as it is commonly used in an electrolyte solution for secondary batteries.
  • the lithium salt is LiPF 6 , LiBF 4 , LiBF 6 , LiSbF 6 , LiAsF 6 , LiClO 4 , LiSO 3 CF 3 , LiN (CF 3 SO 2 ) 2 , LiN (C 2 F 5 SO 2 ) 2 , It may be one or more selected from the group consisting of LiN (SO 2 F) 2 and LiC (CF 3 SO 2 ) 3 .
  • the electrolyte may include 0.05 to 5.0 moles of lithium salt based on 1 liter of the carbonate solvent.
  • the electrolyte may include 0.1 to 5.0 mol, 0.1 to 3.0 mol, 0.1 to 2.5 mol, 0.5 to 3.0 mol or 0.5 to 2.5 mol lithium salt based on 1 liter of the carbonate solvent.
  • the lithium salt is included in the content within the above range, the ionic conductivity of the electrolyte is appropriately secured, and the effect of improving the ion conductivity of the electrolyte that can be obtained compared to the concentration of the added lithium salt is high and economical.
  • the secondary battery electrolyte according to the present invention can be prepared by simply mixing and stirring a carbonate solvent, a lithium salt, glyoxal sulfate and lithium difluorophosphate represented by the formula (1).
  • the electrolyte solution for a secondary battery of the present invention is used in the manufacture of a secondary battery, it is possible to improve the output characteristics, capacity storage characteristics, and lifespan characteristics of the battery by lowering the interfacial resistance of the secondary battery and suppressing the increase in resistance over a wide temperature range.
  • the present invention provides a secondary battery including the secondary battery electrolyte.
  • the secondary battery includes a positive electrode including a positive electrode active material; A negative electrode including a negative electrode active material; A separator disposed between the anode and the cathode; And it may include the secondary battery electrolyte.
  • the positive electrode includes a positive electrode active material capable of reversibly occluding and desorbing lithium ions.
  • the positive electrode active material is at least one metal selected from the group consisting of cobalt, manganese and nickel; And a composite metal oxide including lithium.
  • the solid solution ratio between the metals may be various, and the positive electrode active material may be Mg, Al, K, Na, Ca, Si, Ti, Sn, V, Ge, Ga, B, As, Zr, Cr, Fe, in addition to the above-described metals. It may further include one or more elements selected from the group consisting of, Sr and rare earth elements.
  • the negative electrode includes a negative electrode active material capable of occluding and desorbing lithium ions.
  • the negative electrode active material may be a crystalline or amorphous carbon, or a carbon-based negative electrode active material (thermally decomposed carbon, coke, graphite) of the carbon composite; Burnt organic polymer compound; Carbon fiber; Tin oxide compounds; Lithium metal; Or lithium alloys.
  • the amorphous carbon may include hard carbon, coke, mesocarbon microbead (MCMB) fired at 1500 ° C. or lower, mesophase pitch-based carbon fiber (MPCF), or the like. Can be.
  • the crystalline carbon may be a graphite material, and examples thereof include natural graphite, artificial graphite, graphitized coke, graphitized MCMB, graphitized MPCF, and the like.
  • Other elements constituting the alloy with lithium of the lithium alloy may be aluminum, zinc, bismuth, cadmium, antimony, silicon, lead, tin, gallium or indium.
  • the separator is for preventing a short circuit due to direct contact between the positive electrode and the negative electrode, for example, a polymer membrane such as polyolefin, polypropylene, polyethylene, or a multilayer thereof; Microporous film; web; And nonwoven fabrics.
  • the separator may be coated with a metal oxide or the like on one or both surfaces.
  • lithium difluorophosphate difluorophosphate lithium, CAS No. 845910-47-6.
  • the compound of Formula 1 may be prepared according to known synthesis methods as follows.
  • Ethylene carbonate (EC), ethylmethyl carbonate (EMC) and diethyl carbonate (DEC) were mixed at a volume ratio of 20:40:40 to prepare a mixed solution, and LiPF 6 was dissolved in the mixed solution at a concentration of 1 mol / l.
  • 1% by weight of glyoxal sulfate represented by Formula 1 and 1% by weight of lithium difluorophosphate were added and mixed to prepare an electrolyte solution (electrolyte solution) for a secondary battery.
  • An electrolyte solution was prepared in the same manner as in Example 1, except that glyoxal sulfate represented by Chemical Formula 1 was added in an amount of 2 wt% and lithium difluorophosphate in an amount of 1 wt%.
  • An electrolyte solution was prepared in the same manner as in Example 1, except that lithium difluorophosphate was not added.
  • An electrolyte solution was prepared in the same manner as in Example 2, except that lithium difluorophosphate was not added.
  • An electrolyte solution was prepared in the same manner as in Example 1, except that glyoxal sulfate represented by Chemical Formula 1 was not added.
  • An electrolyte solution was prepared in the same manner as in Example 1, except that glyoxal sulfate and lithium difluorophosphate represented by Chemical Formula 1 were not added.
  • Example 1 Lithium Difluorophosphate of 1% by weight of Formula 1 + 1% by weight 35.7 41.7
  • Example 2 2% by weight of formula 1 + 1% by weight of lithium difluorophosphate 39.5 40.2 Comparative Example 1 1 weight% of formula 1 36.1 48.6 Comparative Example 2 2% by weight of formula 1 38.4 42.9 Comparative Example 3 1% by weight of lithium difluorophosphate 33.7 58.0 Comparative Example 4 No additives 36.1 74.6
  • the battery was stored in a 60 ° C. high temperature oven for 6 weeks, and the discharge capacity after 6 weeks was measured in the same manner as described above, and the capacity retention ratio with respect to the initial capacity was calculated and shown in Table 2.
  • Example 1 Lithium Difluorophosphate of 1% by weight of Formula 1 + 1% by weight 93%
  • Example 2 2% by weight of formula 1 + 1% by weight of lithium difluorophosphate 93% Comparative Example 1 1 weight% of formula 1 87% Comparative Example 2 2% by weight of formula 1 92% Comparative Example 3 1% by weight of lithium difluorophosphate 78% Comparative Example 4 No additives 71%
  • the electrolyte solutions of Examples 1 and 2 were prepared by comparing the initial charge of the battery with no additives (Comparative Example 4) or one type of additives used (Comparative Examples 1 to 3).
  • the discharge amount after high temperature (60 degreeC) storage was remarkably excellent. This is a result showing that the reduction of the electrochemical electrode capacity generated during the high temperature storage of the battery by using an electrolyte containing a combination of the compound of formula (1) and lithium difluorophosphate significantly reduced.
  • the secondary battery including the electrolyte solution of the present invention realized stable charge and discharge capacity even at a high temperature.
  • Example 1 Lithium Difluorophosphate of 1% by weight of Formula 1 + 1% by weight 97%
  • Example 2 2% by weight of formula 1 + 1% by weight of lithium difluorophosphate 96% Comparative Example 1 1 weight% of formula 1 86% Comparative Example 2 2% by weight of formula 1 90% Comparative Example 3 1% by weight of lithium difluorophosphate 83% Comparative Example 4 No additives 6%

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  • Electrochemistry (AREA)
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  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

La présente invention concerne une solution électrolytique, qui comprend du sulfate de glyoxal et des sels de difluorophosphate, pour une batterie secondaire et une batterie secondaire comprenant ladite solution électrolytique. La batterie secondaire présente d'excellentes propriétés de sortie et des propriétés capacitives pendant un stockage à haute température et présente des caractéristiques de durée de vie à haute température améliorées.
PCT/KR2017/012702 2016-11-23 2017-11-10 Solution électrolytique pour batterie secondaire et batterie secondaire comprenant ladite solution électrolytique Ceased WO2018097523A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2016-0156512 2016-11-23
KR1020160156512A KR102661978B1 (ko) 2016-11-23 2016-11-23 이차전지용 전해액 및 이를 포함하는 이차전지

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110931853A (zh) * 2018-09-19 2020-03-27 三星Sdi株式会社 锂电池
CN110931856A (zh) * 2018-09-19 2020-03-27 三星Sdi株式会社 锂电池
CN110931858A (zh) * 2018-09-19 2020-03-27 三星Sdi株式会社 锂电池
CN110931857A (zh) * 2018-09-19 2020-03-27 三星Sdi株式会社 锂电池
CN110931859A (zh) * 2018-09-19 2020-03-27 三星Sdi株式会社 锂电池
CN110931855A (zh) * 2018-09-19 2020-03-27 三星Sdi株式会社 锂电池
CN110931854A (zh) * 2018-09-19 2020-03-27 三星Sdi株式会社 锂电池
CN111261939A (zh) * 2020-01-20 2020-06-09 宁德新能源科技有限公司 电解液和使用其的电化学装置
US11251432B2 (en) 2016-02-12 2022-02-15 Samsung Sdi Co., Ltd. Lithium battery
US11264645B2 (en) 2016-02-12 2022-03-01 Samsung Sdi Co., Ltd. Lithium battery
US11264644B2 (en) 2016-02-12 2022-03-01 Samsung Sdi Co., Ltd. Lithium battery
US11335952B2 (en) 2016-02-12 2022-05-17 Samsung Sdi Co., Ltd. Lithium battery
WO2023004821A1 (fr) * 2021-07-30 2023-02-02 宁德时代新能源科技股份有限公司 Électrolyte, batterie secondaire, module de batterie, bloc-batterie et dispositif électrique
US11637322B2 (en) 2016-02-12 2023-04-25 Samsung Sdi Co., Ltd. Lithium battery

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KR102549975B1 (ko) * 2019-11-20 2023-06-30 제이투에이치바이오텍 (주) 이차 전지용 수성 전해액

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US20160294007A1 (en) * 2015-03-31 2016-10-06 Ningde Contemporary Amperex Technology Limited Electrolyte additive and use thereof in lithium-ion battery

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JP2016531389A (ja) * 2013-07-23 2016-10-06 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ リチウムイオン電池の電解質添加剤としてのオキシラニルアシル誘導体
KR20150050149A (ko) * 2013-10-31 2015-05-08 주식회사 엘지화학 리튬 이차 전지용 전해액 첨가제, 상기 전해액 첨가제를 포함하는 비수성 전해액 및 리튬 이차 전지
KR20150072239A (ko) * 2013-12-19 2015-06-29 에스케이이노베이션 주식회사 리튬 이차전지 전해액 및 이를 포함하는 리튬 이차전지
US20160294007A1 (en) * 2015-03-31 2016-10-06 Ningde Contemporary Amperex Technology Limited Electrolyte additive and use thereof in lithium-ion battery

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11251432B2 (en) 2016-02-12 2022-02-15 Samsung Sdi Co., Ltd. Lithium battery
US11637322B2 (en) 2016-02-12 2023-04-25 Samsung Sdi Co., Ltd. Lithium battery
US11335952B2 (en) 2016-02-12 2022-05-17 Samsung Sdi Co., Ltd. Lithium battery
US11264644B2 (en) 2016-02-12 2022-03-01 Samsung Sdi Co., Ltd. Lithium battery
US11264645B2 (en) 2016-02-12 2022-03-01 Samsung Sdi Co., Ltd. Lithium battery
CN110931859A (zh) * 2018-09-19 2020-03-27 三星Sdi株式会社 锂电池
CN110931854A (zh) * 2018-09-19 2020-03-27 三星Sdi株式会社 锂电池
CN110931855A (zh) * 2018-09-19 2020-03-27 三星Sdi株式会社 锂电池
CN110931853A (zh) * 2018-09-19 2020-03-27 三星Sdi株式会社 锂电池
CN110931857A (zh) * 2018-09-19 2020-03-27 三星Sdi株式会社 锂电池
CN110931858A (zh) * 2018-09-19 2020-03-27 三星Sdi株式会社 锂电池
CN110931854B (zh) * 2018-09-19 2022-10-18 三星Sdi株式会社 锂电池
CN110931856A (zh) * 2018-09-19 2020-03-27 三星Sdi株式会社 锂电池
CN110931856B (zh) * 2018-09-19 2023-08-25 三星Sdi株式会社 锂电池
CN111261939A (zh) * 2020-01-20 2020-06-09 宁德新能源科技有限公司 电解液和使用其的电化学装置
WO2023004821A1 (fr) * 2021-07-30 2023-02-02 宁德时代新能源科技股份有限公司 Électrolyte, batterie secondaire, module de batterie, bloc-batterie et dispositif électrique

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