CN106450437A - Lithium ion battery electrolytic solution capable of discharging at low temperature - Google Patents
Lithium ion battery electrolytic solution capable of discharging at low temperature Download PDFInfo
- Publication number
- CN106450437A CN106450437A CN201610887483.0A CN201610887483A CN106450437A CN 106450437 A CN106450437 A CN 106450437A CN 201610887483 A CN201610887483 A CN 201610887483A CN 106450437 A CN106450437 A CN 106450437A
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- Prior art keywords
- ion battery
- low temperature
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- electrolyte
- additive
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- 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
-
- 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
-
- 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
- H01M2300/0088—Composites
- H01M2300/0091—Composites in the form of mixtures
-
- 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 relates to the technical field of a lithium ion battery, particularly to a lithium ion battery electrolytic solution capable of discharging at a low temperature. The lithium ion battery electrolytic solution is prepared from the following raw materials in parts by weight: 33.1 parts of electrolyte, 52 parts of organic solvent, 17-19 parts of organic additive and 0.23-0.34 parts of inorganic additive, wherein the inorganic additive is K<2>SO<3> or K<2>ClO<4>. By adoption of the electrolytic solution taking K<2>SO<3> or K<2>ClO<4> as the inorganic additive, a stable and dense solid electrolyte interface (SEI) film can be formed on an electrode, and high cycling performance is represented.
Description
Technical field
The present invention relates to technical field of lithium ion, more particularly, to a kind of can low temperature discharge lithium ion battery electrolysis
Liquid.
Background technology
Lithium ion battery is the green high-capacity environment-protecting battery that the nineties in 20th century occurs, because it has voltage height, volume
Little, light weight, specific energy height, memory-less effect, pollution-free, self discharge is little, life-span length the advantages of, in mobile phone, notebook
The upper rapid popularization of compact, multi-functional portable type electronic product application emphasized by computer, video camera, digital camera etc..
Electrolyte is one of important component part of lithium ion battery, and it asks transmission ion in the both positive and negative polarity of battery
Effect, is all had a major impact with rubbish security performance etc. to the capacity of battery, cycle performance.Presently commercially available electrolyte, its solvent is many
For the mixture of carbonic ester, electrolyte lithium salt then predominantly LiPF6, but as lithium ion battery electrolyte, its easy moisture absorption is simultaneously
Hydrolyze and produce toxic gas, heat stability is poor, can resolve into LiF and PF under high temperature5, synthesis difficulty.It is additionally based on LiPF6's
Electrolyte low-temperature conductivity is relatively low, and is being born with the lithium ion battery of the electrolyte assembling without ethylene carbonate (EC) solvent
Pole film forming is difficult.Di-oxalate lithium borate [LiB (C2O4) 2, LiBOB] is the new organic boronic lithium salts that people develop recently
One of, there is good heat stability and electrochemical stability, the electrolysis constituting with organic solvents such as Allyl carbonaties (PC)
Liquid can be formed on anode to be stablized and solid electrolyte interface (SEI) film of densification, has good cycle performance, is
The lithium salts that existing electrolyte LiPF6 realizes industrialized production may be substituted.
There is proposition CO at present2After electrolysis additive, various inorganic compound additives（As SO2、
CS2、Sx 2−、N2O etc.）Also progressively reported by people, they can react generation Li with electrolyte2CO3、Li2S、Li2SO4With
Li2O etc., the same chemical property that can improve battery of organic additive.However, because inorganic gas compounds are compared with indissoluble
Solution is in organic solvent, therefore its production application is more difficult, generally can select to add some inorganic salts, and the present invention is using no
Machine additive K2SO3Or K2ClO4Formed stable, fine and close, flexible SEI film, improve electrolyte low temperature performance and
Cycle performance.
Content of the invention
For the deficiencies in the prior art, the present invention provides a kind of lithium-ion battery electrolytes.By adding in the electrolytic solution
Inorganic additive K2SO3Or K2ClO4, add this inorganic salt a certain amount of contribute in terms of kinetics Li ion migration formed good
Good SEI film, makes the charge/discharge capacity of battery significantly improve.
A kind of can low temperature discharge lithium-ion battery electrolytes, it is made up of following raw material：33.1 parts of electrolyte,
52 parts of organic solvent, organic additive 17-19 part and inorganic additive 0.23-0.34 part.
Described electrolyte is by weight：Li[B(C6H4O2)2]:Li[B(C10H6O2)2]:Li[B(OC6H4CH2O)2]:
Li[B(C2O4)2]:LiBOB=5:5:3:2:2；
Li[B(C6H4O2)2] structural formula be；
Li[B(C10H6O2)2] structural formula be；
Li[B(OC6H4CH2O)2] structural formula be；
Li[B(C2O4)2] structural formula be；
Described organic solvent is by weight：Dimethyl carbonate DMC：Ethyl methyl carbonate EMC=33:19；
Described organic additive is by weight：Vinylene carbonate VC：Fluorinated ethylene carbonate FEC=0.49：17.47；
Described inorganic additive is K2SO3Or K2ClO4.
The present invention has advantages below compared with the prior art：
（1）Add a certain amount of K2SO3Or K2ClO4Contribute to Li ion migration and form good SEI film in terms of kinetics,
The charge/discharge capacity of battery is made to significantly improve；
（2）Inorganic compound additive K2SO3Or K2ClO4Relatively for organic compound additive, there is incombustibility, this is big
The earth enhances the security performance of lithium ion battery；
（3）By selecting the appropriate proportioning of organic chelated lithium borate salt, organic solvent, organic additive and inorganic additive, system
The electrolyte becoming can be formed on electrode to be stablized and solid electrolyte interface (SEI) film of densification, has good circulation
Performance.
Specific embodiment
For disclosing further rather than limiting the present invention, below in conjunction with example, the present invention is described in further detail.
Embodiment 1
A kind of can low temperature discharge lithium-ion battery electrolytes, it is made up of following raw material：33.1 parts of electrolyte, organic
52 parts of solvent, 17 parts of organic additive and 0.23 part of inorganic additive.
Described electrolyte is by weight：Li[B(C6H4O2)2]:Li[B(C10H6O2)2]:Li[B(OC6H4CH2O)2]:
Li[B(C2O4)2]:LiBOB=5:5:3:2:2；
Described organic solvent is by weight：Dimethyl carbonate DMC：Ethyl methyl carbonate EMC=33:19；
Described organic additive is by weight：Vinylene carbonate VC：Fluorinated ethylene carbonate FEC=0.49：17.47；
Described inorganic additive is K2SO3Or K2ClO4.
Embodiment 2
A kind of can low temperature discharge lithium-ion battery electrolytes, it is made up of following raw material：33.1 parts of electrolyte, organic
52 parts of solvent, 18 parts of organic additive and 0.34 part of inorganic additive.
Described electrolyte is by weight：Li[B(C6H4O2)2]:Li[B(C10H6O2)2]:Li[B(OC6H4CH2O)2]:
Li[B(C2O4)2]:LiBOB=5:5:3:2:2；
Described organic solvent is by weight：Dimethyl carbonate DMC：Ethyl methyl carbonate EMC=33:19；
Described organic additive is by weight：Vinylene carbonate VC：Fluorinated ethylene carbonate FEC=0.49：17.47；
Described inorganic additive is K2SO3Or K2ClO4.
Embodiment 3
A kind of can low temperature discharge lithium-ion battery electrolytes, it is made up of following raw material：33.1 parts of electrolyte, organic
52 parts of solvent, 19 parts of organic additive and 0.34 part of inorganic additive.
Described electrolyte is by weight：Li[B(C6H4O2)2]:Li[B(C10H6O2)2]:Li[B(OC6H4CH2O)2]:
Li[B(C2O4)2]:LiBOB=5:5:3:2:2；
Described organic solvent is by weight：Dimethyl carbonate DMC：Ethyl methyl carbonate EMC=33:19；
Described organic additive is by weight：Vinylene carbonate VC：Fluorinated ethylene carbonate FEC=0.49：17.47；
Described inorganic additive is K2SO3Or K2ClO4.
Comparative example
A kind of electrolyte of lithium ion battery, it is made up of following raw material：33.1 parts of electrolyte, 52 parts of organic solvent,
17 parts of organic additive.
Described electrolyte is by weight：Li[B(C6H4O2)2]:Li[B(C10H6O2)2]:Li[B(OC6H4CH2O)2]:
Li[B(C2O4)2]:LiBOB=5:5:3:2:2；
Described organic solvent is by weight：Dimethyl carbonate DMC：Ethyl methyl carbonate EMC=33:19；
Described organic additive is by weight：Vinylene carbonate VC：Fluorinated ethylene carbonate FEC=0.49：17.47；
Described inorganic additive is K2SO3Or K2ClO4.
After the electrolyte injection cobalt acid lithium battery described in embodiment and comparative example, at a temperature of -40 DEG C, experimental data is as follows：
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent with repair
Decorations, all should belong to the covering scope of the present invention.
Claims (5)
1. a kind of can low temperature discharge lithium-ion battery electrolytes it is characterised in that：It is made up of following raw material：Electrolyte
33.1 parts, 52 parts of organic solvent, organic additive 17-19 part and inorganic additive 0.23-0.34 part.
2. according to claim 1 can low temperature discharge lithium-ion battery electrolytes it is characterised in that：Described electrolyte
For organic chelated lithium borate salt, it is by weight：Li[B(C6H4O2)2]:Li[B(C10H6O2)2]:Li[B(OC6H4CH2O)2]:
Li[B(C2O4)2]:LiBOB=5:5:3:2:2.
3. according to claim 1 can low temperature discharge lithium-ion battery electrolytes it is characterised in that：Described organic solvent
It is by weight：Dimethyl carbonate DMC：Ethyl methyl carbonate EMC=33:19.
4. according to claim 1 can low temperature discharge lithium-ion battery electrolytes it is characterised in that：Described organic interpolation
Agent is by weight：Vinylene carbonate VC：Fluorinated ethylene carbonate FEC=0.49：17.47.
5. according to claim 1 can low temperature discharge lithium-ion battery electrolytes it is characterised in that：Described inorganic interpolation
Agent is K2SO3Or K2ClO4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610887483.0A CN106450437A (en) | 2016-10-12 | 2016-10-12 | Lithium ion battery electrolytic solution capable of discharging at low temperature |
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| CN201610887483.0A CN106450437A (en) | 2016-10-12 | 2016-10-12 | Lithium ion battery electrolytic solution capable of discharging at low temperature |
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| CN201610887483.0A Pending CN106450437A (en) | 2016-10-12 | 2016-10-12 | Lithium ion battery electrolytic solution capable of discharging at low temperature |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112331914A (en) * | 2019-08-05 | 2021-02-05 | 杉杉新材料（衢州）有限公司 | Non-aqueous electrolyte of lithium ion battery without ethylene carbonate solvent and battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1964123A (en) * | 2005-11-10 | 2007-05-16 | 比亚迪股份有限公司 | A non-aqueous electrolyte for lithium cell |
| CN104022310A (en) * | 2014-06-18 | 2014-09-03 | 厦门首能科技有限公司 | Lithium ion secondary battery electrolyte and lithium ion battery containing electrolyte |
| CN104934639A (en) * | 2015-04-29 | 2015-09-23 | 张家港智电芳华蓄电研究所有限公司 | Preparation method of lithium ion battery electrolyte solution |
| CN105977523A (en) * | 2016-07-06 | 2016-09-28 | 无锡市宝来电池有限公司 | Lithium ion electrolyte and lithium ion battery |
-
2016
- 2016-10-12 CN CN201610887483.0A patent/CN106450437A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1964123A (en) * | 2005-11-10 | 2007-05-16 | 比亚迪股份有限公司 | A non-aqueous electrolyte for lithium cell |
| CN104022310A (en) * | 2014-06-18 | 2014-09-03 | 厦门首能科技有限公司 | Lithium ion secondary battery electrolyte and lithium ion battery containing electrolyte |
| CN104934639A (en) * | 2015-04-29 | 2015-09-23 | 张家港智电芳华蓄电研究所有限公司 | Preparation method of lithium ion battery electrolyte solution |
| CN105977523A (en) * | 2016-07-06 | 2016-09-28 | 无锡市宝来电池有限公司 | Lithium ion electrolyte and lithium ion battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112331914A (en) * | 2019-08-05 | 2021-02-05 | 杉杉新材料（衢州）有限公司 | Non-aqueous electrolyte of lithium ion battery without ethylene carbonate solvent and battery |
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Application publication date: 20170222 |