[go: up one dir, main page]

WO2023123031A1 - Dispositif électrochimique et dispositif électronique - Google Patents

Dispositif électrochimique et dispositif électronique Download PDF

Info

Publication number
WO2023123031A1
WO2023123031A1 PCT/CN2021/142401 CN2021142401W WO2023123031A1 WO 2023123031 A1 WO2023123031 A1 WO 2023123031A1 CN 2021142401 W CN2021142401 W CN 2021142401W WO 2023123031 A1 WO2023123031 A1 WO 2023123031A1
Authority
WO
WIPO (PCT)
Prior art keywords
lithium
sulfate
electrochemical device
negative electrode
electrolyte
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/CN2021/142401
Other languages
English (en)
Chinese (zh)
Inventor
张青文
王可飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningde Amperex Technology Ltd
Original Assignee
Ningde Amperex Technology Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ningde Amperex Technology Ltd filed Critical Ningde Amperex Technology Ltd
Priority to PCT/CN2021/142401 priority Critical patent/WO2023123031A1/fr
Priority to CN202180027069.1A priority patent/CN115380409B/zh
Publication of WO2023123031A1 publication Critical patent/WO2023123031A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • 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
    • 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
    • H01M10/0567—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
    • H01M10/42—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
    • 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 content of the nonionic surfactant is a%; based on the weight of the electrolyte, the content of the alkyl lithium sulfate is b% ; and a and b satisfy: 0.1 ⁇ a/b ⁇ 2.
  • the nonionic surfactant has a segment formed by an oxyethylene structure.
  • the content of the compound containing fluorine and phosphorus is c%, and the value of c ranges from 0.1 to 5.
  • the present application provides an electronic device comprising the electrochemical device according to the present application.
  • a list of items linked by the term "at least one of” may mean any combination of the listed items.
  • the phrase "at least one of A and B” means only A; only B; or A and B.
  • the phrase "at least one of A, B, and C” means only A; or only B; only C; A and B (excluding C); A and C (excluding B); B and C (excluding A); or all of A, B, and C.
  • Item A may contain a single element or multiple elements.
  • Item B may contain a single element or multiple elements.
  • Item C may contain a single element or multiple elements.
  • the term "at least one of" has the same meaning as the term "at least one of”.
  • hydrocarbyl encompasses alkyl, alkenyl, alkynyl.
  • alkyl groups include, but are not limited to, methyl, ethyl, n-propyl, isopropyl, cyclopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, cyclobutyl, n-pentyl, Isopentyl, neopentyl, cyclopentyl, methylcyclopentyl, ethylcyclopentyl, n-hexyl, isohexyl, cyclohexyl, n-heptyl, octyl, cyclopropyl, cyclobutyl, norbornyl Base etc.
  • the increase in gas production will cause the internal air pressure of the lithium-ion battery to increase to exceed the valve opening pressure, causing the explosion-proof valve of the battery cell to open, resulting in a safety hazard.
  • the methods to prevent lithium-ion batteries from overcharging mainly include adding external protection devices and adding new electrolyte additives.
  • the addition of external devices to prevent overcharging will increase the cost of cell manufacturing, and the introduction of new electrolyte additives may lead to new side reactions.
  • the negative electrode can be prepared by the following method: coating the negative electrode mixture slurry comprising negative electrode active material, resin binder, etc. on the negative electrode current collector, after drying, calendering to form negative electrode active material layers on both sides of the negative electrode current collector, thus Negative pole is available.
  • the electrolyte includes alkyl lithium sulfate.
  • R is C1-10 hydrocarbon group or C1-10 hydrocarbon group substituted by halogen.
  • examples of the cyclic ether may include, but are not limited to, one or more of the following: tetrahydrofuran, 2-methyltetrahydrofuran, 1,3-dioxolane, 2-methyl 1,3-dioxolane, 4-methyl 1,3-dioxolane, 1,3-dioxane, 1,4-dioxane and dimethoxypropane.
  • the solvent used in the electrolyte of the present application comprises: ethylene carbonate, propylene carbonate, diethyl carbonate, ethyl propionate, propyl propionate, ⁇ -butyrolactone and combinations thereof .
  • the electrolyte is selected from LiPF 6 , LiSbF 6 , FSO 3 Li, CF 3 SO 3 Li, LiN(FSO 2 ) 2 , LiN(FSO 2 )(CF 3 SO 2 ), LiN(CF 3 SO 2 ) 2 , LiN(C 2 F 5 SO 2 ) 2 , cyclic lithium 1,2-perfluoroethanebissulfonimide, cyclic lithium 1,3-perfluoropropanebissulfonimide, LiC(FSO 2 ) 3 , LiC(CF 3 SO 2 ) 3 , LiC(C 2 F 5 SO 2 ) 3 , LiBF 3 CF 3 , LiBF 3 C 2 F 5 , LiPF 3 (CF 3 ) 3 , LiPF 3 (C 2 F 5 ) 3.
  • the salt selected from the group consisting of monofluorophosphate, borate, oxalate, and fluorosulfonate comprises less than 20% or less than 10% by weight of the electrolyte. In some embodiments, the content of the salt selected from the group consisting of monofluorophosphate, borate, oxalate and fluorosulfonate is within the range formed by any two of the above values.
  • the additional salts are present at greater than 0.01% or greater than 0.1% by weight of the electrolyte. In some embodiments, the additional salts are present at less than 20%, less than 15%, or less than 10% by weight of the electrolyte. In some embodiments, the content of other salts is within the range formed by any two values above. Salts other than these having the above content contribute to the balance of the electrical conductivity and viscosity of the electrolytic solution.
  • lithium transition metal composite oxides may include, but are not limited to, LiNi 0.5 Mn 0.5 O 2 , LiNi 0.85 Co 0.10 Al 0.05 O 2 , LiNi 0.33 Co 0.33 Mn 0.33 O 2 , LiNi 0.45 Co 0.10 Al 0.45 O 2 , LiMn 1.8 Al 0.2 O 4 and LiMn 1.5 Ni 0.5 O 4 etc.
  • combinations of lithium transition metal composite oxides include, but are not limited to, combinations of LiCoO 2 and LiMn 2 O 4 , wherein a part of Mn in LiMn 2 O 4 may be replaced by transition metals (for example, LiNi 0.33 Co 0.33 Mn 0.33 O 2 ), part of Co in LiCoO 2 can be replaced by transition metals.
  • a substance different from its composition may be attached to the surface of the positive electrode active material.
  • surface attachment substances may include, but are not limited to: oxides such as alumina, silica, titania, zirconia, magnesia, calcium oxide, boron oxide, antimony oxide, bismuth oxide; lithium sulfate, sodium sulfate, potassium sulfate , magnesium sulfate, calcium sulfate, aluminum sulfate and other sulfates; lithium carbonate, calcium carbonate, magnesium carbonate and other carbonates; carbon, etc.
  • the positive electrode can be produced by forming a positive electrode active material layer containing a positive electrode active material and a binder on a current collector.
  • the manufacture of the positive electrode using the positive electrode active material can be carried out by a conventional method, that is, the positive electrode active material and the binder, as well as the conductive material and thickener as required, etc. are dry mixed, made into a sheet, and the obtained The sheet is pressed onto the positive current collector; or these materials are dissolved or dispersed in a liquid medium to make a slurry, and the slurry is coated on the positive current collector and dried to form a positive electrode current collector.
  • a positive electrode active material layer whereby a positive electrode can be obtained.
  • the electrode group may have either a laminated structure in which the positive electrode and the negative electrode are laminated with the separator interposed therebetween, or a structure in which the positive electrode and the negative electrode are wound in a spiral shape with the separator interposed therebetween.
  • the ratio of the mass of the electrode group to the internal volume of the battery is greater than 40% or greater than 50%.
  • the electrode set occupancy is less than 90% or less than 80%.
  • the occupancy of the electrode group is within the range formed by any two values above. When the electrode group occupancy ratio is within the above range, the capacity of the electrochemical device can be ensured, and at the same time, the decrease in characteristics such as repeated charge-discharge performance and high-temperature storage due to an increase in internal pressure can be suppressed.
  • Metal exterior cases include, but are not limited to, encapsulation and sealing structures formed by welding metals together by laser welding, resistance welding, or ultrasonic welding; or riveted structures using the above-mentioned metals through resin spacers.
  • the exterior case using the above-mentioned laminated film includes, but is not limited to, a package sealing structure formed by thermally bonding resin layers to each other, and the like. In order to improve the sealability, a resin different from the resin used in the laminated film may be interposed between the above-mentioned resin layers.
  • the electrochemical device of the present application includes any device that undergoes an electrochemical reaction, and specific examples thereof include a lithium metal secondary battery or a lithium ion secondary battery.
  • the present application further provides an electronic device, which includes the electrochemical device according to the present application.
  • Overcharge deformation rate [(T 2 -T 1 )/T 1 ] ⁇ 100%.
  • the overcharge deformation rate of the lithium ion battery can be further reduced and the floating charge failure time can be improved.
  • the electrolyte further includes a fluorine- and phosphorus-containing compound (at least one of lithium difluorophosphate, lithium monofluorophosphate, or a compound of formula II), the overcharge deformation rate of the lithium-ion battery can be further reduced and its Float charge failure time.
  • a fluorine- and phosphorus-containing compound at least one of lithium difluorophosphate, lithium monofluorophosphate, or a compound of formula II
  • Table 4 shows the effect of the content relationship between alkyl lithium sulfate and fluorine- and phosphorus-containing compounds in the electrolyte on the float performance and safety of lithium-ion batteries. Except for the parameters listed in Table 4, the settings of Examples 4-1 to 4-8 are the same as those of Example 1-1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Inorganic Chemistry (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

La présente demande concerne un dispositif électrochimique et un dispositif électronique. Spécifiquement, la présente invention concerne un dispositif électrochimique, comprenant une électrode positive, une électrode négative et un électrolyte, l'électrode négative comprenant un collecteur de courant d'électrode négative et une couche de matériau actif d'électrode négative formée sur le collecteur de courant d'électrode négative ; la couche de matériau actif d'électrode négative comprend un tensioactif non ionique ; et l'électrolyte comprend du sulfate d'alkyle de lithium. Le dispositif électrochimique de la présente demande présente des performances de charge flottante et une sécurité améliorées.
PCT/CN2021/142401 2021-12-29 2021-12-29 Dispositif électrochimique et dispositif électronique Ceased WO2023123031A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2021/142401 WO2023123031A1 (fr) 2021-12-29 2021-12-29 Dispositif électrochimique et dispositif électronique
CN202180027069.1A CN115380409B (zh) 2021-12-29 2021-12-29 电化学装置和电子装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2021/142401 WO2023123031A1 (fr) 2021-12-29 2021-12-29 Dispositif électrochimique et dispositif électronique

Publications (1)

Publication Number Publication Date
WO2023123031A1 true WO2023123031A1 (fr) 2023-07-06

Family

ID=84060664

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/142401 Ceased WO2023123031A1 (fr) 2021-12-29 2021-12-29 Dispositif électrochimique et dispositif électronique

Country Status (2)

Country Link
CN (1) CN115380409B (fr)
WO (1) WO2023123031A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117638082A (zh) * 2024-01-24 2024-03-01 宁德新能源科技有限公司 锂离子电池和电子装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105074996A (zh) * 2013-04-01 2015-11-18 宇部兴产株式会社 非水电解液和使用了该非水电解液的蓄电设备
CN107394269A (zh) * 2016-05-17 2017-11-24 宁德新能源科技有限公司 电解液及锂离子电池
CN111129594A (zh) * 2019-12-25 2020-05-08 宁德新能源科技有限公司 电化学装置及包含其的电子装置
CN111129592A (zh) * 2019-12-25 2020-05-08 宁德新能源科技有限公司 电化学装置及包含其的电子装置
CN111740163A (zh) * 2020-03-23 2020-10-02 杉杉新材料（衢州）有限公司 一种高电压锂离子电池电解液及使用该电解液的锂离子电池

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014024990A1 (fr) * 2012-08-09 2014-02-13 三菱化学株式会社 Solution électrolytique non aqueuse et batterie secondaire électrolytique non aqueuse l'utilisant
EP4020652A4 (fr) * 2019-12-25 2023-06-07 Ningde Amperex Technology Limited Dispositif électrochimique et dispositif électronique le comprenant
CN119340335A (zh) * 2020-10-15 2025-01-21 宁德新能源科技有限公司 电化学装置和电子装置
CN116344737A (zh) * 2020-10-15 2023-06-27 宁德新能源科技有限公司 电化学装置和电子装置
KR102698439B1 (ko) * 2020-10-15 2024-08-26 닝더 엠프렉스 테크놀로지 리미티드 전기화학장치 및 전자장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105074996A (zh) * 2013-04-01 2015-11-18 宇部兴产株式会社 非水电解液和使用了该非水电解液的蓄电设备
CN107394269A (zh) * 2016-05-17 2017-11-24 宁德新能源科技有限公司 电解液及锂离子电池
CN111129594A (zh) * 2019-12-25 2020-05-08 宁德新能源科技有限公司 电化学装置及包含其的电子装置
CN111129592A (zh) * 2019-12-25 2020-05-08 宁德新能源科技有限公司 电化学装置及包含其的电子装置
CN111740163A (zh) * 2020-03-23 2020-10-02 杉杉新材料（衢州）有限公司 一种高电压锂离子电池电解液及使用该电解液的锂离子电池

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117638082A (zh) * 2024-01-24 2024-03-01 宁德新能源科技有限公司 锂离子电池和电子装置
CN117638082B (zh) * 2024-01-24 2024-04-09 宁德新能源科技有限公司 锂离子电池和电子装置

Also Published As

Publication number Publication date
CN115380409B (zh) 2025-04-25
CN115380409A (zh) 2022-11-22

Similar Documents

Publication Publication Date Title
CN115224233B (zh) 电化学装置和电子装置
CN112151750B (zh) 电化学装置和电子装置
CN112151749A (zh) 电化学装置和电子装置
CN112151752B (zh) 电化学装置和电子装置
CN115101802B (zh) 电化学装置和电子装置
WO2023123028A1 (fr) Dispositif électrochimique et dispositif électronique
JP2025105982A (ja) 電気化学装置および電子装置
WO2022077350A1 (fr) Dispositif électrochimique et dispositif électronique
CN112542569B (zh) 一种电极组件及包含其的电化学装置、电子装置
WO2023123027A1 (fr) Appareil électrochimique et appareil électronique
CN115380409B (zh) 电化学装置和电子装置
KR102594980B1 (ko) 전기화학장치 및 전자장치
CN115380408B (zh) 电化学装置和电子装置
JP7357758B2 (ja) 電気化学デバイスおよび電子装置
JP7680534B2 (ja) 電気化学装置及び電子装置
WO2023123353A1 (fr) Dispositif électrochimique et dispositif électronique

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21969406

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21969406

Country of ref document: EP

Kind code of ref document: A1

WWG Wipo information: grant in national office

Ref document number: 202180027069.1

Country of ref document: CN