CN105428710A - High-temperature electrolytic solution for large-capacity plastic-casing lithium ion battery - Google Patents

High-temperature electrolytic solution for large-capacity plastic-casing lithium ion battery Download PDF

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Publication number
CN105428710A
CN105428710A CN201510961835.8A CN201510961835A CN105428710A CN 105428710 A CN105428710 A CN 105428710A CN 201510961835 A CN201510961835 A CN 201510961835A CN 105428710 A CN105428710 A CN 105428710A
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CN
China
Prior art keywords
lithium ion
electrolytic solution
electrolyte
temperature
carbonate
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.)
Pending
Application number
CN201510961835.8A
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Chinese (zh)
Inventor
武玉哲
刘欣
刘琦
陈军
陈大圣
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.)
CNSG ANHUI HONG SIFANG LITHIUM Co Ltd
Original Assignee
CNSG ANHUI HONG SIFANG LITHIUM Co 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 CNSG ANHUI HONG SIFANG LITHIUM Co Ltd filed Critical CNSG ANHUI HONG SIFANG LITHIUM Co Ltd
Priority to CN201510961835.8A priority Critical patent/CN105428710A/en
Publication of CN105428710A publication Critical patent/CN105428710A/en
Pending 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
    • 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
    • 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

Abstract

The invention provides a high-temperature electrolytic solution for a large-capacity plastic-casing lithium ion battery. The high-temperature electrolytic solution is prepared from the following components in percentage by mass: 10 to 18 percent of electrolyte, 1 to 4 percent of additive, 0.5 to 2 percent of wetting agent and an organic solvent with which the solution is supplemented to be 100 percent. The high-temperature electrolytic solution provided by the invention has the advantages that the viscosity of the high-temperature electrolytic solution is reduced, and the liquidity of the high-temperature electrolytic solution is increased; the wettability of the high-temperature electrolytic solution is increased by adding the wetting agent, so that a wrinkling phenomenon of a membrane of a plastic-casing large-capacity lithium ion power battery can be solved; the high-temperature cycling life of the plastic-casing large-capacity lithium ion power battery is prolonged.

Description

A kind of high-temperature electrolyte moulding case lithium ion battery for Large Copacity
technical field:
The present invention relates to lithium ion battery material technical field, be specifically related to a kind of high-temperature electrolyte moulding case lithium ion battery for Large Copacity.
background technology:
Lithium ion battery is a kind of secondary rechargeable battery, it mainly rely on lithium ion between a positive electrode and a negative electrode movement carry out work, namely in charge and discharge process, Li +come and go between two electrodes and embed and deintercalation: during charging, Li +from positive pole deintercalation, embed negative pole through electrolyte, negative pole is in rich lithium state; Then contrary during electric discharge.And the electrolyte of lithium battery is the carrier of battery intermediate ion transmission, be generally made up of lithium salts and organic solvent.The viscosity of current business-like high-temperature electrolyte of lithium ion battery is high, be used in and infiltrate bad phenomenon of crumpling with barrier film more than there will be in 100Ah high capacity cell, cause place's negative pole graphite of crumpling to come off, reduce battery capacity, and had a strong impact on cycle performance and the useful life of lithium ion battery.
summary of the invention:
The object of this invention is to provide a kind of high-temperature electrolyte moulding case lithium ion battery for Large Copacity, not only solved the problem that barrier film is crumpled, also improve the high temperature cyclic performance that Large Copacity moulds case lithium ion battery.
For realizing above goal of the invention, the invention provides following technical scheme:
Mould a high-temperature electrolyte for case lithium ion battery for Large Copacity, it is prepared from by mass percentage by following component: electrolyte 10-18%, additive 1-4%, size 0.5-2%, organic solvent polishing to 100%.
Further scheme, described electrolyte is lithium hexafluoro phosphate.
Further scheme, described organic solvent is at least one of ethylene carbonate (EC), diethyl carbonate (DEC), dimethyl carbonate (DMC), methyl ethyl carbonate (EMC).
Further scheme, described additive is 1-3 propane sulfonic acid propyl ester (PS) and vinylene carbonate (VC).
Further scheme, described size is that fatty glyceride, aliphatic acid sorb are smooth, at least one of polysorbate stearic acid, neopelex, lecithin, N-acylamino acid, betaine, aliphatic amine polyoxyethylene ether quaternary ammonium compound.
The present invention has following beneficial effect relative to prior art:
1, the present invention reduces electrolyte viscosity, increases the mobility of electrolyte;
2, the present invention improves the wettability of electrolyte by adding size, thus shell high-capacity lithium-ion power battery barrier film wrinkle phenomenon is moulded in solution;
3, the present invention adds additive, defines SEI film more stable at high operating temperatures, thus improves the high-temperature cycle life of battery.
embodiment:
Embodiment 1
By 120gLiFP6,10gVC, 10gPS and 5g neopelex, be dissolved in 855g organic solvent (ethylene carbonate EC: diethyl carbonate DEC: methyl ethyl carbonate EMC=2:0.6:3), after mixing, make electrolyte.
Embodiment 2
By 100gLiFP6 and 20gVC, 20gPS, 10g fatty glyceride and 10g lecithin, be dissolved in 840g organic solvent (ethylene carbonate EC: diethyl carbonate DEC: methyl ethyl carbonate EMC=1.8:0.7:3), after mixing, make electrolyte.
Embodiment 3
By 120gLiFP6 and 13gVC, 12gPS; 2g aliphatic amine polyoxyethylene ether quaternary ammonium compound, 1.5g betaine, 1.5gN-acylamino acid are dissolved in 850g organic solvent (ethylene carbonate EC: dimethyl carbonate DMC: methyl ethyl carbonate EMC=2:1:3), make electrolyte after mixing.
Embodiment 4
By 150gLiFP6 and 5gVC, 5gPS, 5g fatty glyceride, 5g lecithin is dissolved in has in 830g machine solvent (ethylene carbonate EC: dimethyl carbonate DMC: methyl ethyl carbonate EMC=1.5:0.8:3), makes electrolyte after mixing.
Embodiment 5
By 180gLiFP6 and 15gVC, 10gPS, 2.5gN-acylamino acid 2.5g polysorbate stearic acid is dissolved in has in 790g machine solvent (ethylene carbonate EC: dimethyl carbonate DMC: methyl ethyl carbonate EMC=1:1:2), makes electrolyte after mixing.
Comparative example 1
By 300gLiFP6 and 50gPC, be dissolved in 650g organic solvent (ethylene carbonate EC: dimethyl carbonate DMC: methyl ethyl carbonate EMC=4:2:3), after mixing, make electrolyte.
Comparative example 2
300gLiFP6,40gPC are dissolved in 660g organic solvent (ethylene carbonate EC: dimethyl carbonate DMC: methyl ethyl carbonate EMC=4:2:3), after mixing, make electrolyte.
Embodiment 6
Being joined by electrolyte prepared by above-described embodiment 1-5 and comparative example 1-2 moulds in shell 200Ah lithium ion battery, then detect its flatulence situation, capability retention and battery respectively to disassemble metacneme and to crumple situation, shown in concrete examination criteria and testing result and following table 1:
Table 1, examination criteria and result
55 DEG C, whether 72h flatulence 55 DEG C, after 7d stores, capacity keeps % 55 DEG C circulate 200 times, capability retention % Battery is disassembled metacneme and whether is crumpled
Examination criteria QC/T 743-2006 QC/T 743-2006 QC/T 743-2006
Embodiment 1 No 97.32 95.28 No
Embodiment 2 No 97.45 95.18 No
Embodiment 3 No 97.26 95.13 No
Embodiment 4 No 96.98 92.6 No
Embodiment 5 No 97.12 93.54 No
Comparative example 1 Be 91.45 80.61 Be
Comparative example 2 Be 92.78 87.7 Be
Can find out from upper table 1, electrolyte prepared by the present invention joins to be moulded in shell 200Ah lithium ion battery, equal not flatulence deposit 72h under 50 DEG C of conditions after; And the equal flatulence of comparative example 1,2.In addition, the 200Ah lithium ion battery that electrolyte of the present invention is made is deposited battery capacity after 7 days and is kept more than 96.98% under 50 DEG C of conditions, and circulate 200 times under 50 DEG C of conditions, its battery capacity conservation rate is more than 92.6%; Far away higher than the highest by 92.78%, 87.7% in comparative example 1,2.In addition, the 200Ah lithium ion battery that electrolyte of the present invention is made is disassembled metacneme and is not all crumpled.Describe electrolyte prepared by the present invention and not only solve the problem that 55 DEG C of aging flatulence and barrier film crumple, and improve the high temperature cyclic performance of lithium ion battery.
Above embodiment is not limited only to protection scope of the present invention, all modify based on basic thought of the present invention or change all belong to protection scope of the present invention.

Claims (5)

1. mould a high-temperature electrolyte for case lithium ion battery for Large Copacity, it is characterized in that: it is prepared from by mass percentage by following component: electrolyte 10-18%, additive 1-4%, size 0.5-2%, organic solvent polishing to 100%.
2. high-temperature electrolyte according to claim 1, is characterized in that: described electrolyte is lithium hexafluoro phosphate.
3. high-temperature electrolyte according to claim 1, is characterized in that: described organic solvent is at least one of ethylene carbonate, diethyl carbonate, dimethyl carbonate, methyl ethyl carbonate.
4. high-temperature electrolyte according to claim 1, is characterized in that: described additive is 1-3 propane sulfonic acid propyl ester and vinylene carbonate.
5. high-temperature electrolyte according to claim 1, is characterized in that: described size is that fatty glyceride, aliphatic acid sorb are smooth, at least one of polysorbate stearic acid, neopelex, lecithin, N-acylamino acid, betaine, aliphatic amine polyoxyethylene ether quaternary ammonium compound.
CN201510961835.8A 2015-12-21 2015-12-21 High-temperature electrolytic solution for large-capacity plastic-casing lithium ion battery Pending CN105428710A (en)

Priority Applications (1)

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Applications Claiming Priority (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107887647A (en) * 2017-10-26 2018-04-06 广州天赐高新材料股份有限公司 A kind of 5V high voltages electrolyte for lithium secondary batteries and the lithium secondary battery containing the electrolyte
CN111276339A (en) * 2018-12-04 2020-06-12 中国科学院上海硅酸盐研究所 Supercapacitor pseudo-capacitive electrolyte and preparation method and application thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1333580A (en) * 2000-07-17 2002-01-30 松下电器产业株式会社 Non-aqueous electrochemistry device
US20060204834A1 (en) * 2005-02-02 2006-09-14 Kim Young S Electrochemical device comprising aliphatic mono-nitrile compound
CN101771167A (en) * 2010-02-05 2010-07-07 九江天赐高新材料有限公司 High-capacity lithium-ion electrolyte, battery and preparation method of battery
CN101826635A (en) * 2010-04-09 2010-09-08 广州天赐高新材料股份有限公司 Polymer electrolyte for lithium battery and manufacturing method of battery thereof
CN102544582A (en) * 2010-12-29 2012-07-04 东莞市杉杉电池材料有限公司 Electrolyte for power lithium ion battery
JP2013131374A (en) * 2011-12-21 2013-07-04 Panasonic Corp Compound device
CN103413689A (en) * 2013-07-19 2013-11-27 北京科技大学 Method for preparing graphene aerogel and graphene/ metallic oxide aerogel

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1333580A (en) * 2000-07-17 2002-01-30 松下电器产业株式会社 Non-aqueous electrochemistry device
US20060204834A1 (en) * 2005-02-02 2006-09-14 Kim Young S Electrochemical device comprising aliphatic mono-nitrile compound
CN101771167A (en) * 2010-02-05 2010-07-07 九江天赐高新材料有限公司 High-capacity lithium-ion electrolyte, battery and preparation method of battery
CN101826635A (en) * 2010-04-09 2010-09-08 广州天赐高新材料股份有限公司 Polymer electrolyte for lithium battery and manufacturing method of battery thereof
CN102544582A (en) * 2010-12-29 2012-07-04 东莞市杉杉电池材料有限公司 Electrolyte for power lithium ion battery
JP2013131374A (en) * 2011-12-21 2013-07-04 Panasonic Corp Compound device
CN103413689A (en) * 2013-07-19 2013-11-27 北京科技大学 Method for preparing graphene aerogel and graphene/ metallic oxide aerogel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107887647A (en) * 2017-10-26 2018-04-06 广州天赐高新材料股份有限公司 A kind of 5V high voltages electrolyte for lithium secondary batteries and the lithium secondary battery containing the electrolyte
CN107887647B (en) * 2017-10-26 2020-08-11 广州天赐高新材料股份有限公司 Electrolyte for 5V high-voltage lithium secondary battery and lithium secondary battery containing electrolyte
CN111276339A (en) * 2018-12-04 2020-06-12 中国科学院上海硅酸盐研究所 Supercapacitor pseudo-capacitive electrolyte and preparation method and application thereof

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Application publication date: 20160323

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