CN109411822A - A kind of modern high security electrolyte - Google Patents

A kind of modern high security electrolyte Download PDF

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Publication number
CN109411822A
CN109411822A CN201710706169.2A CN201710706169A CN109411822A CN 109411822 A CN109411822 A CN 109411822A CN 201710706169 A CN201710706169 A CN 201710706169A CN 109411822 A CN109411822 A CN 109411822A
Authority
CN
China
Prior art keywords
electrolyte
wt
high security
kind
modern high
Prior art date
Application number
CN201710706169.2A
Other languages
Chinese (zh)
Inventor
秦学
吕军
陶蕾
王丽
Original Assignee
江苏津谊新能源科技有限公司
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Filing date
Publication date
Application filed by 江苏津谊新能源科技有限公司 filed Critical 江苏津谊新能源科技有限公司
Priority to CN201710706169.2A priority Critical patent/CN109411822A/en
Publication of CN109411822A publication Critical patent/CN109411822A/en

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/056Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564Accumulators 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
    • H01M10/0566Liquid materials
    • H01M10/0569Liquid materials characterised by the solvents
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • H01M10/0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/056Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564Accumulators 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
    • H01M10/0566Liquid materials
    • H01M10/0567Liquid materials characterised by the additives
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/056Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564Accumulators 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
    • H01M10/0566Liquid materials
    • H01M10/0568Liquid materials characterised by the solutes
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/42Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/4235Safety or regulating additives or arrangements in electrodes, separators or electrolyte
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00Electrolytes
    • H01M2300/0017Non-aqueous electrolytes
    • H01M2300/0025Organic electrolyte
    • H01M2300/0028Organic electrolyte characterised by the solvent
    • H01M2300/0037Mixture of solvents
    • H01M2300/004Three solvents

Abstract

The present invention relates to a kind of modern high security electrolyte, which is EC, PC and DMC, and solute is LiN (SO2CF3)(SO2C4F9), also contain 1%~4% (wt) ethylene carbonate base vinyl acetate (VEC), 1%~4% (wt) triphenyl phosphate (TPP), 0.5%~2% (wt) phosphoric acid hexichol mono-n-butylester (MDP) and 1%~3% (wt) 3- chloro thiophene in electrolyte, the electrolyte has excellent anti-flammability, helps to reduce lithium ion battery a possibility that being heated, overcharging, burn under needle thorn, short-circuit condition.

Description

A kind of modern high security electrolyte

Technical field

The present invention relates to field of chemical power source, and in particular to a kind of lithium ion battery modern high security electrolyte.

Background technique

With lithium ion battery 3C consumption electronic product, electric tool, electric car, in terms of rapid proliferation And extensive use, the safety issue of battery become to become increasingly conspicuous.Organic electrolyte is extremely incendive substance, battery overheat and It crosses charge and discharge to be likely to cause the burning even explosion of battery of electrolyte, therefore improves the safety and stability of electrolyte It is an important method for improving lithium ion battery security.

The present invention has developed a kind of modern high security electrolyte, for manufacturing quick-fried lithium ion battery, helps to reduce electricity Pond is a possibility that being heated, overcharging, burn under needle thorn, short-circuit condition.

Summary of the invention

The purpose of the present invention is to provide a kind of modern high security electrolyte.

The technical scheme is that a kind of modern high security electrolyte, the electrolyte solvent is EC (ethylene carbonate Ester), the mixed solution of PC (propene carbonate) and DMC (dimethyl carbonate), volume ratio 1:2:1, solute LiN (SO2CF3)(SO2C4F9), content is 0.5~2mol/L.

According to foregoing invention, contain 1%~4% (wt) ethylene carbonate base vinyl acetate (VEC), 1%~4% in electrolyte (wt) triphenyl phosphate (TPP) and 0.5%~2% (wt) phosphoric acid hexichol mono-n-butylester (MDP).

According to foregoing invention, contain 1%~3% (wt) 3- chloro thiophene in electrolyte.

The beneficial effects of the present invention are: electrolyte according to the present invention, compared with the past will not reduce the ion of electrolyte Conductivity can greatly improve electrolyte flame-retardant by the synergistic action effect of each component, and due to containing The 3- chloro thiophene of special ratios, electrolyte can occur polymerization reaction when over-charging of battery and substantially increase electrolyte internal resistance To block battery further react raising safety, using the electrolyte of the invention will be greatly reduced lithium ion battery by Heat, a possibility that overcharging, combustion explosion occurs under needle thorn, short-circuit extremity.

Specific embodiment

A. electrolyte configures

By LiN (SO2CF3)(SO2C4F9), EC (ethylene carbonate), PC (propene carbonate) and DMC (dimethyl carbonate) it is mixed It closes, LiN (SO is made2CF3)(SO2C4F9) organic solution, when mixing, contain 0.5mol/L~2mol/L according to every liter of electrolyte Solute LiN (SO2CF3)(SO2C4F9), the volume ratio of EC, PC and DMC are 1:2:1 in solvent;In above-mentioned organic solution successively 1%~4% (wt) ethylene carbonate base vinyl acetate (VEC), 1%~4% (wt) triphenyl phosphate (TPP), 0.5%~2% is added (wt) phosphoric acid hexichol mono-n-butylester (MDP) and 1%~3% (wt) 3- chloro thiophene are sufficiently mixed uniformly.

B. the assembling of lithium ion battery

By ternary nickel cobalt manganese lithium positive plate, diaphragm, graphite cathode piece according to diaphragm between positive plate and negative electrode tab Mode is helically wound poling group, pole is assembled into aluminum plastic film, PL10564155 type 3.7V10Ah battery is made, then to electricity The configured electrolyte of injection, then battery case is sealed, that is, complete the assembling of lithium ion battery in the shell of pond.

C. the chemical conversion of battery and the test of security performance

Fertilizer alleviant:

A) 0.2C electric current constant-current charge turns 4.2V constant-voltage charge to electric current 50mA to 4.2V

B) 30min is shelved

C) 0.5C constant-current discharge is to 2.75V

D) 0.2C electric current constant-current charge turns 4.2V constant-voltage charge to electric current 50mA to 4.2V

E) 30min is shelved

F) 1C constant-current discharge is to 2.75V

Security test system:

A) overcharge: battery turns 4.2V constant-voltage charge to electric current when charging to voltage 4.2V with 1/3C be 0.1C, then with 1C charging, until cell voltage reaches 5V or the charging time reaches 90min.

B) short-circuit: battery turns 4.2V constant-voltage charge to electric current when charging to voltage 4.2V with 1/3C be 0.1C, then will be electric Pond should be less than 5m Ω through external short circuit 10min, outside line resistance.

C) heat: battery turns 4.2V constant-voltage charge to electric current when charging to voltage 4.2V with 1/3C be 0.1C, then will be electric Pond is placed in 85 DEG C of ± 2 DEG C of insulating boxs, and keeps the temperature 120min.

D) needle pierces: battery turns 4.2V constant-voltage charge to electric current when charging to voltage 4.2V with 1/3C be 0.1C, is then usedHigh temperature resistant steel needle, the speed with 10mm/s~40mm/s, passed through from the direction perpendicular to accumulator plate Wear (steel needle rests in battery).

Test result:

" √ ": indicate that, by test, catching fire phenomenon does not occur for battery;" " is represented not by test, and battery occurs Catching fire phenomenon.

The present invention is not limited to the embodiment of above-mentioned embodiment, this field inspiration according to the present invention is not departed from The improvement and modification that scope of the invention is made all should be within the scope of the present invention.

Claims (3)

1. a kind of modern high security electrolyte, which is characterized in that solvent be EC (ethylene carbonate), PC (propene carbonate) and The mixed solution of DMC (dimethyl carbonate), volume ratio 1:2:1, solute are LiN (SO2CF3)(SO2C4F9), content is 0.5~2mol/L.
2. a kind of modern high security electrolyte according to claim 1, which is characterized in that also contain 1% in electrolyte ~4% (wt) ethylene carbonate base vinyl acetate (VEC), 1%~4% (wt) triphenyl phosphate (TPP) and 0.5%~2% (wt) phosphorus Sour hexichol mono-n-butylester (MDP).
3. a kind of modern high security electrolyte according to claim 1, which is characterized in that also contain 1% in electrolyte ~3% (wt) 3- chloro thiophene.
CN201710706169.2A 2017-08-17 2017-08-17 A kind of modern high security electrolyte CN109411822A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710706169.2A CN109411822A (en) 2017-08-17 2017-08-17 A kind of modern high security electrolyte

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710706169.2A CN109411822A (en) 2017-08-17 2017-08-17 A kind of modern high security electrolyte

Publications (1)

Publication Number Publication Date
CN109411822A true CN109411822A (en) 2019-03-01

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Family Applications (1)

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CN201710706169.2A CN109411822A (en) 2017-08-17 2017-08-17 A kind of modern high security electrolyte

Country Status (1)

Country Link
CN (1) CN109411822A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1411619A (en) * 2001-01-04 2003-04-16 三菱化学株式会社 Nonaqueous electrolytic liquid and lithium secondary battery employing same
US20030157413A1 (en) * 2002-02-15 2003-08-21 Chen Chun-Hua Lithium ion battery with improved safety
CN1860629A (en) * 2004-05-25 2006-11-08 松下电器产业株式会社 Lithium ion secondary battery and method for manufacturing same
CN102938471A (en) * 2012-12-05 2013-02-20 奇瑞汽车股份有限公司 Electrolyte used for lithium ion battery and lithium ion battery containing same
CN103339784A (en) * 2011-01-31 2013-10-02 三菱化学株式会社 Non-aqueous electrolytic solution, and non-aqueous electrolyte secondary battery using same
CN103715458A (en) * 2013-10-23 2014-04-09 江西优锂新材股份有限公司 Preparation method of electrolyte used for lithium manganate power battery at high temperature

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1411619A (en) * 2001-01-04 2003-04-16 三菱化学株式会社 Nonaqueous electrolytic liquid and lithium secondary battery employing same
US20030157413A1 (en) * 2002-02-15 2003-08-21 Chen Chun-Hua Lithium ion battery with improved safety
CN1860629A (en) * 2004-05-25 2006-11-08 松下电器产业株式会社 Lithium ion secondary battery and method for manufacturing same
CN103339784A (en) * 2011-01-31 2013-10-02 三菱化学株式会社 Non-aqueous electrolytic solution, and non-aqueous electrolyte secondary battery using same
CN102938471A (en) * 2012-12-05 2013-02-20 奇瑞汽车股份有限公司 Electrolyte used for lithium ion battery and lithium ion battery containing same
CN103715458A (en) * 2013-10-23 2014-04-09 江西优锂新材股份有限公司 Preparation method of electrolyte used for lithium manganate power battery at high temperature

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