CN109411816A - A kind of high magnification electrolyte of lithium ion battery - Google Patents

A kind of high magnification electrolyte of lithium ion battery Download PDF

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Publication number
CN109411816A
CN109411816A CN201811247933.5A CN201811247933A CN109411816A CN 109411816 A CN109411816 A CN 109411816A CN 201811247933 A CN201811247933 A CN 201811247933A CN 109411816 A CN109411816 A CN 109411816A
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CN
China
Prior art keywords
electrolyte
carbonate
lithium
lithium ion
ion battery
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
CN201811247933.5A
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Chinese (zh)
Inventor
邵俊华
孔东波
张利娟
王亚洲
郭飞
王珂珂
闫国锋
乔文忠
李海杰
侯红岐
谢佳庆
卢小波
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.)
Henan Faenlaite New Energy Science & Technology Co Ltd
Original Assignee
Henan Faenlaite New Energy Science & Technology Co Ltd
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Filing date
Publication date
Application filed by Henan Faenlaite New Energy Science & Technology Co Ltd filed Critical Henan Faenlaite New Energy Science & Technology Co Ltd
Priority to CN201811247933.5A priority Critical patent/CN109411816A/en
Publication of CN109411816A publication Critical patent/CN109411816A/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
    • 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
    • H01M2300/00—Electrolytes
    • H01M2300/0017—Non-aqueous electrolytes
    • H01M2300/0025—Organic 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
    • H01M2300/0028—Organic electrolyte characterised by the solvent
    • H01M2300/0037—Mixture of solvents
    • 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 discloses a kind of high magnification electrolyte of lithium ion battery, the mixing lithium salts of lithium hexafluoro phosphate and double fluorine sulfimide lithium compositions has been used in electrolyte of the invention, the conductivity and lithium ion transference number of the raising electrolyte of electrolyte can be improved, the lower passivating film of impedance is formed, the multiplying power of electrolyte is improved；Meanwhile it being added to flame-retardant additive in the electrolytic solution, the flame retardant property of electrolyte can be further improved, the safety of electrolyte is indirectly improved.

Description

A kind of high magnification electrolyte of lithium ion battery
Technical field
The invention belongs to technical field of lithium batteries, more particularly to a kind of high magnification electrolyte of lithium ion battery.
Background technique
Lithium ion battery has the characteristics that specific energy is high, specific power is big, has extended cycle life.Currently, lithium ion battery by It is widely used in the fields such as consumer electronics product.With the development of new-energy automobile, lithium ion battery is also got in dynamic field Come more universal, it will there is bigger potentiality to be exploited and market prospects.
In the prior art, the multiplying power of lithium battery is generally improved by increasing additive, it is general for high-rate lithium battery Two kinds of additives: one, film for additive (such as VC, PS) are used, the purpose of both additives is added in two, surfactant It is to reduce the impedance of SEI film except the interface in order to improve electrolyte Yu SEI film, alsos for accelerating electrolyte wetting pole piece, diaphragm With improve lithium ion migration environment in the electrolyte bulk solution and diffusional environment in pole piece in heavy-current discharge, in turn The high rate performance of lithium ion battery is improved, and both additive levels can not be excessively high, otherwise will affect the property such as circulation of battery Can, it also will increase cost.
Summary of the invention
The object of the invention is that overcoming above-mentioned deficiency, a kind of high magnification electrolyte of lithium ion battery is provided.
In order to achieve the above objectives, the present invention is implemented according to following technical scheme:
A kind of high magnification electrolyte of lithium ion battery, the electrolyte include electrolyte lithium salt, organic solvent, fire-retardant addition Agent；
The electrolyte lithium salt is the mixture of lithium hexafluoro phosphate and double fluorine sulfimide lithiums；
The organic solvent is ethylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, butylene, carbon In sour first propyl ester, propene carbonate two or more；
The flame-retardant additive includes fluorinated ethylene carbonate, five fluorine ring of ethyoxyl, three phosphonitrile, one in trifluoromethyl sulfonic acid lithium Kind；
The additive amount of the electrolyte lithium salt is 1mol/L~1.7mol/L；The additive amount of the flame-retardant additive accounts for electrolyte matter The 1%~5% of amount.
Preferably, the molar ratio of the lithium hexafluoro phosphate in the electrolyte lithium salt and double fluorine sulfimide lithiums be 12:1~ 12:5。
Preferably, the organic solvent is the mixture of ethylene carbonate, dimethyl carbonate, methyl ethyl carbonate；The carbon Vinyl acetate, dimethyl carbonate, methyl ethyl carbonate mass ratio be 1:1:1.
Preferably, the organic solvent be ethylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate it is mixed Close object；The ethylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate mass ratio be 1:0.4:0.5:1.
Preferably, the organic solvent is the mixture of ethylene carbonate, propene carbonate, diethyl carbonate；The carbon Vinyl acetate, propene carbonate, diethyl carbonate mass ratio be 1:1:2.
Action principle of the invention:
It is lithium hexafluoro phosphate and pair mixture of fluorine sulfimide lithiums, double fluorine sulfimides that electrolyte lithium salt of the invention, which uses, The transport number that lithium has thermal stability more better than lithium hexafluoro phosphate, leads ion energy and higher lithium ion, but due to double fluorine The higher cost of sulfimide lithium, therefore be used in mixed way using double fluorine sulfimide lithiums as auxiliary lithium salts with lithium hexafluoro phosphate.
Double fluorine sulfimide lithiums are added in lithium hexafluoro phosphate, are fabricated to electrolyte, can be improved the conductivity of electrolyte And lithium ion transference number, the number of transportable lithium ion increases in electrolyte, and concentration polarization weakens；Double fluorine sulphonyl are sub- simultaneously Amine lithium helps to reduce electrode surface membrane impedance, forms the stable passivating film to conduct electricity very well；Separately increasing due to lithium ion And the lower passivating film of impedance is formed, these factors improve the multiplying power of electrolyte, are more applicable for high-power lithium Ion battery.
Meanwhile invention increases the uses of flame-retardant additive, further increase it for the use of powerful electrolyte Security performance.
Compared with prior art, the invention has the benefit that
The mixing lithium salts that lithium hexafluoro phosphate and double fluorine sulfimide lithium compositions have been used in electrolyte of the invention, can improve electrolysis The conductivity and lithium ion transference number of the raising electrolyte of liquid, form the lower passivating film of impedance, improve the multiplying power of electrolyte； Meanwhile it being added to flame-retardant additive in the electrolytic solution, the flame retardant property of electrolyte can be further improved, electricity is indirectly improved Solve the safety of liquid.
Specific embodiment
With specific embodiment, the invention will be further described below, the invention illustrative examples and illustrate to use Explain the present invention, but not as a limitation of the invention.
Embodiment 1
A kind of high magnification electrolyte of lithium ion battery, including electrolyte lithium salt, organic solvent, flame-retardant additive；
Electrolyte lithium salt is the mixture of lithium hexafluoro phosphate and double fluorine sulfimide lithiums；Lithium hexafluoro phosphate and double fluorine sulfimide lithiums Molar ratio be 12:1；The additive amount of electrolyte lithium salt is 1.3mol/L；
Organic solvent is the mixture of ethylene carbonate, dimethyl carbonate, methyl ethyl carbonate；Ethylene carbonate, dimethyl carbonate, The mass ratio of methyl ethyl carbonate is 1:1:1；
Flame-retardant additive is fluorinated ethylene carbonate；The additive amount of flame-retardant additive accounts for the 2% of electrolyte quality.
Embodiment 2
A kind of high magnification electrolyte of lithium ion battery, including electrolyte lithium salt, organic solvent, flame-retardant additive；
Electrolyte lithium salt is the mixture of lithium hexafluoro phosphate and double fluorine sulfimide lithiums；Lithium hexafluoro phosphate and double fluorine sulfimide lithiums Molar ratio be 12:3；The additive amount of electrolyte lithium salt is 1.5mol/L；
Organic solvent is the mixture of ethylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate；Ethylene carbonate, Dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate mass ratio be 1:0.4:0.5:1；
Flame-retardant additive is five fluorine ring of ethyoxyl, three phosphonitrile；The additive amount of flame-retardant additive accounts for the 5% of electrolyte quality.
Embodiment 3
A kind of high magnification electrolyte of lithium ion battery, including electrolyte lithium salt, organic solvent, flame-retardant additive；
Electrolyte lithium salt is the mixture of lithium hexafluoro phosphate and double fluorine sulfimide lithiums；Lithium hexafluoro phosphate and double fluorine sulfimide lithiums Molar ratio be 12:5；The additive amount of electrolyte lithium salt is 1.7mol/L；
Organic solvent is the mixture of ethylene carbonate, propene carbonate, diethyl carbonate；Ethylene carbonate, propene carbonate, The mass ratio of diethyl carbonate is 1:1:2；
Flame-retardant additive is trifluoromethyl sulfonic acid lithium；The additive amount of flame-retardant additive accounts for the 3% of electrolyte quality.
The limitation that technical solution of the present invention is not limited to the above specific embodiments, it is all to do according to the technique and scheme of the present invention Technology deformation out, falls within the scope of protection of the present invention.

Claims (5)

1. a kind of high magnification electrolyte of lithium ion battery, it is characterised in that: the electrolyte includes electrolyte lithium salt, You Jirong Agent, flame-retardant additive；
The electrolyte lithium salt is the mixture of lithium hexafluoro phosphate and double fluorine sulfimide lithiums；
The organic solvent is ethylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, butylene, carbonic acid In first propyl ester, propene carbonate two or more；
The flame-retardant additive includes fluorinated ethylene carbonate, five fluorine ring of ethyoxyl, three phosphonitrile, one in trifluoromethyl sulfonic acid lithium Kind；
The additive amount of the electrolyte lithium salt is 1mol/L~1.7mol/L；The additive amount of the flame-retardant additive accounts for electrolyte matter The 1%~5% of amount.
2. a kind of high magnification electrolyte of lithium ion battery according to claim 1, it is characterised in that: the electrolyte lithium The molar ratio of lithium hexafluoro phosphate and double fluorine sulfimide lithiums in salt is 12:1~12:5.
3. a kind of high magnification electrolyte of lithium ion battery according to claim 2, it is characterised in that: the organic solvent For ethylene carbonate, dimethyl carbonate, methyl ethyl carbonate mixture；The ethylene carbonate, dimethyl carbonate, methyl ethyl carbonate The mass ratio of ester is 1:1:1.
4. a kind of high magnification electrolyte of lithium ion battery according to claim 2, it is characterised in that: the organic solvent For ethylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate mixture；The ethylene carbonate, carbonic acid diformazan Ester, diethyl carbonate, methyl ethyl carbonate mass ratio be 1:0.4:0.5:1.
5. a kind of high magnification electrolyte of lithium ion battery according to claim 2, it is characterised in that: the organic solvent For ethylene carbonate, propene carbonate, diethyl carbonate mixture；The ethylene carbonate, propene carbonate, carbonic acid diethyl The mass ratio of ester is 1:1:2.
CN201811247933.5A 2018-10-25 2018-10-25 A kind of high magnification electrolyte of lithium ion battery Pending CN109411816A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110828776A (en) * 2019-10-18 2020-02-21 风帆有限责任公司 Puncture-resistant low-temperature-resistant cylindrical lithium ion battery and preparation method thereof
CN110845458A (en) * 2019-10-15 2020-02-28 湖南博信新能源科技有限公司 Maleic anhydride, lithium battery electrolyte and lithium ion battery
CN112349962A (en) * 2019-08-08 2021-02-09 宁德时代新能源科技股份有限公司 Lithium ion battery
CN117096450A (en) * 2023-10-18 2023-11-21 瑞浦兰钧能源股份有限公司 Secondary battery electrolyte and battery thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103456993A (en) * 2013-09-30 2013-12-18 东莞市杉杉电池材料有限公司 High-voltage lithium-ion battery electrolyte
CN104218258A (en) * 2014-09-17 2014-12-17 宜春金晖新能源材料有限公司 Over-charging prevention flame-retardant battery electrolyte
CN105977534A (en) * 2016-06-21 2016-09-28 上海交通大学 Functional electrolyte for secondary lithium-sulfur battery and preparation method thereof
CN106252716A (en) * 2016-10-17 2016-12-21 东莞市凯欣电池材料有限公司 A kind of safe lithium ion power battery electrolyte and lithium-ion-power cell
CN106328999A (en) * 2016-11-29 2017-01-11 河南省法恩莱特新能源科技有限公司 High-rate electrolyte of lithium-ion battery
CN107359367A (en) * 2017-05-18 2017-11-17 无锡九宇宝新能源科技有限公司 A kind of high voltage withstanding flame-retardant lithium ion battery electrolyte and preparation method thereof
CN108134134A (en) * 2017-12-11 2018-06-08 中航锂电（洛阳）有限公司 A kind of lithium-ion battery electrolytes additive, electrolyte, lithium ion battery

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103456993A (en) * 2013-09-30 2013-12-18 东莞市杉杉电池材料有限公司 High-voltage lithium-ion battery electrolyte
CN104218258A (en) * 2014-09-17 2014-12-17 宜春金晖新能源材料有限公司 Over-charging prevention flame-retardant battery electrolyte
CN105977534A (en) * 2016-06-21 2016-09-28 上海交通大学 Functional electrolyte for secondary lithium-sulfur battery and preparation method thereof
CN106252716A (en) * 2016-10-17 2016-12-21 东莞市凯欣电池材料有限公司 A kind of safe lithium ion power battery electrolyte and lithium-ion-power cell
CN106328999A (en) * 2016-11-29 2017-01-11 河南省法恩莱特新能源科技有限公司 High-rate electrolyte of lithium-ion battery
CN107359367A (en) * 2017-05-18 2017-11-17 无锡九宇宝新能源科技有限公司 A kind of high voltage withstanding flame-retardant lithium ion battery electrolyte and preparation method thereof
CN108134134A (en) * 2017-12-11 2018-06-08 中航锂电（洛阳）有限公司 A kind of lithium-ion battery electrolytes additive, electrolyte, lithium ion battery

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112349962A (en) * 2019-08-08 2021-02-09 宁德时代新能源科技股份有限公司 Lithium ion battery
CN112349962B (en) * 2019-08-08 2021-11-09 宁德时代新能源科技股份有限公司 Lithium ion battery
CN110845458A (en) * 2019-10-15 2020-02-28 湖南博信新能源科技有限公司 Maleic anhydride, lithium battery electrolyte and lithium ion battery
CN110828776A (en) * 2019-10-18 2020-02-21 风帆有限责任公司 Puncture-resistant low-temperature-resistant cylindrical lithium ion battery and preparation method thereof
CN117096450A (en) * 2023-10-18 2023-11-21 瑞浦兰钧能源股份有限公司 Secondary battery electrolyte and battery thereof
CN117096450B (en) * 2023-10-18 2024-03-15 瑞浦兰钧能源股份有限公司 Secondary battery electrolyte and battery thereof

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Application publication date: 20190301