CN105870500B - Stable electrolyte for reducing battery expansion - Google Patents
Stable electrolyte for reducing battery expansion Download PDFInfo
- Publication number
- CN105870500B CN105870500B CN201610331270.XA CN201610331270A CN105870500B CN 105870500 B CN105870500 B CN 105870500B CN 201610331270 A CN201610331270 A CN 201610331270A CN 105870500 B CN105870500 B CN 105870500B
- Authority
- CN
- China
- Prior art keywords
- electrolyte
- carbonate
- battery
- lithium
- reducing
- 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.)
- Active
Links
- 239000003792 electrolyte Substances 0.000 title claims abstract description 82
- 239000013538 functional additive Substances 0.000 claims abstract description 26
- 229910003002 lithium salt Inorganic materials 0.000 claims abstract description 20
- 159000000002 lithium salts Chemical class 0.000 claims abstract description 20
- 239000003960 organic solvent Substances 0.000 claims abstract description 9
- QQONPFPTGQHPMA-UHFFFAOYSA-N Propene Chemical group CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims abstract description 6
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims abstract description 6
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims abstract description 6
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 claims abstract description 3
- SBLRHMKNNHXPHG-UHFFFAOYSA-N 4-fluoro-1,3-dioxolan-2-one Chemical compound FC1COC(=O)O1 SBLRHMKNNHXPHG-UHFFFAOYSA-N 0.000 claims abstract description 3
- 235000010290 biphenyl Nutrition 0.000 claims abstract description 3
- 239000004305 biphenyl Substances 0.000 claims abstract description 3
- 239000000126 substance Substances 0.000 claims abstract description 3
- 150000008053 sultones Chemical class 0.000 claims abstract description 3
- 230000008961 swelling Effects 0.000 claims description 23
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 13
- -1 lithium tetrafluoroborate Chemical compound 0.000 claims description 12
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 11
- 229910052744 lithium Inorganic materials 0.000 claims description 11
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 4
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 claims description 4
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 4
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 4
- QSZMZKBZAYQGRS-UHFFFAOYSA-N lithium;bis(trifluoromethylsulfonyl)azanide Chemical compound [Li+].FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F QSZMZKBZAYQGRS-UHFFFAOYSA-N 0.000 claims description 3
- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical compound C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 claims description 2
- JWUJQDFVADABEY-UHFFFAOYSA-N 2-methyltetrahydrofuran Chemical compound CC1CCCO1 JWUJQDFVADABEY-UHFFFAOYSA-N 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 claims description 2
- 125000001931 aliphatic group Chemical group 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- CPPKAGUPTKIMNP-UHFFFAOYSA-N cyanogen fluoride Chemical group FC#N CPPKAGUPTKIMNP-UHFFFAOYSA-N 0.000 claims description 2
- 150000005676 cyclic carbonates Chemical group 0.000 claims description 2
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 claims description 2
- NKDDWNXOKDWJAK-UHFFFAOYSA-N dimethoxymethane Chemical compound COCOC NKDDWNXOKDWJAK-UHFFFAOYSA-N 0.000 claims description 2
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 claims description 2
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 claims description 2
- 239000003223 protective agent Substances 0.000 claims description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 11
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 11
- 150000002170 ethers Chemical class 0.000 abstract description 4
- 238000011160 research Methods 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 230000004888 barrier function Effects 0.000 abstract description 2
- 150000002500 ions Chemical class 0.000 abstract description 2
- 230000008092 positive effect Effects 0.000 abstract description 2
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 239000002904 solvent Substances 0.000 description 13
- 229910001290 LiPF6 Inorganic materials 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 229910013880 LiPF4 Inorganic materials 0.000 description 3
- 239000008151 electrolyte solution Substances 0.000 description 3
- 229940021013 electrolyte solution Drugs 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- GSOLWAFGMNOBSY-UHFFFAOYSA-N cobalt Chemical compound [Co][Co][Co][Co][Co][Co][Co][Co] GSOLWAFGMNOBSY-UHFFFAOYSA-N 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- 230000001351 cycling effect Effects 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
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
- H01M10/0569—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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to the research field of battery electrolyte, in particular to stable electrolyte for reducing battery expansion. The material comprises the following substances in parts by weight: 0.5-20 parts of fluoronitrile, 0.1-15 parts of electrolyte lithium salt, 60-90 parts of organic solvent and 0.1-5 parts of functional additive, wherein the functional additive is at least one of biphenyl, vinylene carbonate, fluoroethylene carbonate or 1,3- (1-propylene) sultone. The invention has the advantages and positive effects that ions in the electrolyte run and exchange too fast between the anode and the cathode of the battery at high temperature or under high pressure, the lithium ions collide with the organic solvents of carbonates and ethers, and the fluoronitrile can have a microscopic action with the organic solvents of carbonates and ethers at high temperature or under high pressure to form a micro barrier film to prevent the further decomposition of the electrolyte, thereby avoiding the further expansion of the lithium ion battery and prolonging the service life of the battery.
Description
Technical Field
The invention relates to the field of chemical engineering, relates to the field of battery electrolyte research, and particularly relates to a stable electrolyte for reducing battery expansion.
Background
With the development and wide application of lithium ion batteries, the requirements on various properties of lithium ion battery electrolytes are increasingly improved, and high voltage, high specific energy and long cycle life are the main targets pursued by people. With the increase of the number of times of recycling of the battery, particularly when the battery is exposed to severe conditions such as high temperature or high pressure, the electrolyte generates heat to cause the battery to expand, thereby causing the service life of the battery to be reduced. The applicable temperature range of the lithium ion battery is narrow, and generally, when the temperature is higher than 60 ℃, the lithium hexafluorophosphate system electrolyte is decomposed, so that the battery core expands, the capacity of the battery is quickly attenuated, and even combustion or explosion can occur, thereby seriously limiting the wide application of the battery. When the lithium ion battery is used as a power supply and used in a high-temperature extreme environment, the local or overall temperature of the battery is usually higher than 60 ℃, so that the research on improving the safety of the lithium ion battery in the high-temperature environment has very important significance on how to improve the capacity of avoiding expansion of the battery at high temperature or high pressure.
Disclosure of Invention
The invention provides a novel stable electrolyte for reducing battery swelling, aiming at the problems of improving the safety of a lithium ion battery and reducing the swelling of the lithium ion battery. In order to achieve the purpose, the technical scheme of the invention is as follows:
a stable electrolyte for reducing battery swelling comprises the following substances in parts by weight:
the functional additive is at least one of biphenyl, vinylene carbonate, fluoroethylene carbonate or 1,3- (1-propylene) sultone, the protective agent is fluoroformonitrile, and the structural formula is as follows:
preferably, the electrolyte lithium salt is at least one of lithium tetrafluoroborate, lithium hexafluorophosphate, lithium bifluorosulfonamide or lithium bis (trifluoromethanesulfonimide) imide.
Preferably, the carbonate organic solvent is a cyclic carbonate or a chain carbonate compound; the ether organic solvent is at least one selected from tetrahydrofuran, 2-methyltetrahydrofuran, 1, 3-dioxolane, dimethoxymethane, 1, 2-dimethoxyethane and diglyme.
Preferably, the cyclic carbonate compound is at least one of ethylene carbonate, propylene carbonate and gamma-butyrolactone; the chain carbonate compound is at least one of dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate and carbonate derivatives synthesized by carbonic acid and straight chain or branched chain aliphatic monoalcohol with 3-8 carbon atoms.
Preferably, the stable electrolyte for reducing swelling of a battery is applied to a primary lithium battery or a secondary lithium battery.
Compared with the prior art, the invention has the advantages and positive effects that ions in the electrolyte run and exchange too fast between the anode and the cathode of the battery under high temperature or high pressure, the lithium ions collide with molecules of the organic solvents of carbonates and ethers, and the fluoronitrile can have a microscopic action with the organic solvents of carbonates and ethers under high temperature or high pressure to form a micro barrier film to prevent the electrolyte from being further decomposed, thereby avoiding the further expansion of the lithium ion battery and prolonging the service life of the battery.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
FIG. 1 is a graph of 3.0-4.5V cycling performance test results at 0.2C rate for a graphite/cobalt acid lithium battery using the stabilized electrolyte to reduce cell swelling prepared in example 13 and the electrolyte of comparative example 4.
Detailed Description
In order that the above objects, features and advantages of the present invention may be more clearly understood, the present invention will be further described with reference to specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.
Example 1 this example provides a stable electrolyte for reducing battery swelling, with the following components and contents: the lithium salt being LiPF6The concentration in the electrolyte is 0.8mol/L, and the solvent is EC: DMC: EMC 1:1:1 (volume ratio), the adding amount of the fluoronitrile accounts for 1 percent of the total mass of the electrolyte, the functional additive is PS, and the concentration of the functional additive in the electrolyte is 0.5 mol/L.
Example 2, this example provides a stable electrolyte for reducing battery swelling, which comprises the following components in percentage by weight: the lithium salt being LiPF6The concentration in the electrolyte is 1.5mol/L, and the solvent is EC: DMC: EMC 1:1:1 (volume ratio), the adding amount of the fluoronitrile accounts for 1 percent of the total mass of the electrolyte, the functional additive is PS, and the concentration of the functional additive in the electrolyte is 0.1 mol/L.
Example 3 this example provides a stable electrolyte for reducing battery swelling, with the following components and amounts: the lithium salt being LiPF6The concentration in the electrolyte is 2mol/L, and the solvent is EC: DMC: EMC 1: 2: 1 (volume ratio), the adding amount of the fluoronitrile accounts for 1 percent of the total mass of the electrolyte, the functional additive is PS, and the concentration of the functional additive in the electrolyte is 0.2 mol/L.
Example 4 this example provides a stable electrolyte for reducing battery swelling, with the following components and amounts: the lithium salt being LiPF6The concentration in the electrolyte is 5.0mol/L, and the solvent is EC: DMC: EMC 1:1:1 (volume ratio), the adding amount of the fluoronitrile accounts for 1 percent of the total mass of the electrolyte, the functional additive is PS, and the concentration of the functional additive in the electrolyte is 0.1 mol/L.
Example 5 this example provides a stable electrolyte that reduces cell swelling, with the following components and amounts: the lithium salt being LiPF4The concentration in the electrolyte is 1.0mol/L, and the solvent is PC: DMC 1: 2 (volume ratio), the adding amount of the fluoronitrile accounts for 1 percent of the total mass of the electrolyte, the functional additives are VC and VEC, and the concentrations in the electrolyte are respectively 0.1mol/L and 0.2 mol/L.
Example 6 this example provides a stable electrolyte that reduces cell swelling, with the following components and amounts: the lithium salt being LiPF4The concentration in the electrolyte is 2.0mol/L, and the solvent is PC: DMC 1: 2 (volume ratio), the adding amount of the fluoronitrile accounts for 1 percent of the total mass of the electrolyte, the functional additives are VC and VEC, and the concentrations in the electrolyte are respectively 0.1mol/L and 0.2 mol/L.
Example 7 this example provides a stable electrolyte that reduces cell swelling, with the following components and amounts: the lithium salt is lithium bis (trifluoromethylsulfonyl) imide, the concentration of the lithium salt in the electrolyte is 3.0mol/L, and the solvent is PC: DMC 1: 2 (volume ratio), the adding amount of the fluoronitrile accounts for 1 percent of the total mass of the electrolyte, the functional additives are VC and VEC, and the concentrations in the electrolyte are respectively 0.1mol/L and 0.2 mol/L.
Example 8 this example provides a stable electrolyte for reducing battery swelling, with the following components and amounts: the lithium salt being LiPF4The concentration in the electrolyte is 5.0mol/L, and the solvent is PC: DMC 1: 2 (volume ratio), the adding amount of the fluoronitrile accounts for 1 percent of the total mass of the electrolyte, the functional additives are VC and VEC, and the concentrations in the electrolyte are respectively 0.1mol/L and 0.2 mol/L.
Example 9 this example provides a stable electrolyte for reducing battery swelling, with the following components and amounts: the lithium salt is lithium bifluorosulfonamide, the concentration of the lithium salt in the electrolyte is 1.0mol/L, and the solvent is EC: DEC: EMC 1:1:1 (volume ratio), the adding amount of the fluoronitrile accounts for 1 percent of the total mass of the electrolyte, the functional additives are VC and BP, and the concentration of the functional additives in the electrolyte is 0.2 mol/L.
Example 10 this example provides a stable electrolyte for reducing battery swelling, with the following components and amounts: the lithium salt is lithium bis (trifluoromethylsulfonyl) imide, the concentration of the lithium salt in the electrolyte is 1.0mol/L, and the solvent is EC: DEC: EMC 1:1:1 (volume ratio), the adding amount of the fluoronitrile accounts for 1 percent of the total mass of the electrolyte, the functional additives are VC and BP, and the concentration of the functional additives in the electrolyte is 0.2 mol/L.
Example 11 this example provides a stable electrolyte that reduces cell swelling, with the following components and amounts: the lithium salt being LiPF6The concentration in the electrolyte is 1.0mol/L, and the solvent is EC: DEC: EMC 1:1:1 (body)Volume ratio), the adding amount of the fluoronitrile accounts for 1 percent of the total mass of the electrolyte, the functional additives are VC and BP, and the concentration of the functional additives in the electrolyte is 0.2 mol/L.
Example 12 this example provides a stable electrolyte that reduces cell swelling, with the following components and amounts: the lithium salt is lithium bifluorosulfonamide, the concentration of the lithium salt in the electrolyte is 1.0mol/L, and the solvent is EC: DEC: EMC 1:1:1 (volume ratio), the adding amount of the fluoronitrile accounts for 1 percent of the total mass of the electrolyte, the functional additives are VC and BP, and the concentration of the functional additives in the electrolyte is 0.2 mol/L.
Comparative example 1, this comparative example provides an electrolyte, the components and their contents are as follows: the lithium salt being LiPF6The concentration in the electrolyte is 1.0mol/L, and the solvent is EC: DMC: EMC 1:1:1 (volume ratio), PS is used as a functional additive, and the concentration of the functional additive in the electrolyte is 0.1 mol/L.
The electrolyte solutions prepared in examples 1 to 12 and comparative example 1 were applied to lithium cobaltate batteries, and the swelling of the batteries was measured after 100 cycles under 0.2C, 4.5 to 3.0V conditions.
TABLE 1 examination and comparison of swelling behavior of batteries using the electrolyte solutions prepared in examples 1 to 12 and the electrolyte solution prepared in comparative example 1
Example 13 this example provides a stable electrolyte that reduces cell swelling by adding 3% fluorocarbonitrile, 0.5% VC, and 1% PS to an electrolyte containing 1m lipf6 volume ratio of ethylene carbonate, dimethyl carbonate, and ethyl methyl carbonate 1: 1.
Comparative example 4 this example provides a nonaqueous electrolyte containing 1M LiPF6 in a 1:1:1 volume ratio of ethylene carbonate, dimethyl carbonate and ethyl methyl carbonate with 0.5% VC and 1% PS.
FIG. 1 is a graph of the cycling performance of 3.0-4.5V at 0.2C rate for a graphite/cobalt acid lithium battery using the stable electrolyte to reduce cell swelling prepared in example 13 and the electrolyte of comparative example 4. From the figure, after 100 cycles, the capacity retention rate of the blank battery is sharply reduced to about 84%, the capacity attenuation of the battery using the electrolyte is rarely maintained to be more than 99%, the capacity of the battery is basically maintained to be not attenuated, and good stability is shown, so that the cycle performance of the battery can be obviously improved by using the stable electrolyte for reducing the battery expansion, and the purpose of prolonging the service life of the battery is further achieved.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.
Claims (3)
1. A stable electrolyte for reducing battery swelling is characterized by comprising the following substances in parts by weight:
the functional additive is at least one of biphenyl, vinylene carbonate, fluoroethylene carbonate or 1,3- (1-propylene) sultone, the protective agent is fluoroformonitrile, and the structural formula is as follows:
the electrolyte lithium salt is at least one of lithium tetrafluoroborate, lithium hexafluorophosphate, lithium bifluorosulfonamide or lithium bis (trifluoromethylsulfonyl) imide;
the carbonate organic solvent is cyclic carbonate and chain carbonate compounds; the ether organic solvent is at least one selected from tetrahydrofuran, 2-methyltetrahydrofuran, 1, 3-dioxolane, dimethoxymethane, 1, 2-dimethoxyethane and diglyme.
2. The stable electrolyte for reducing battery swelling according to claim 1, wherein the cyclic carbonate compound is at least one of ethylene carbonate, propylene carbonate and gamma-butyrolactone; the chain carbonate compound is at least one of dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate and carbonate derivatives synthesized by carbonic acid and straight chain or branched chain aliphatic monoalcohol with 3-8 carbon atoms.
3. The battery swell-reducing stable electrolyte according to any one of claims 1 to 2, wherein the battery swell-reducing stable electrolyte is used in a primary lithium battery or a secondary lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610331270.XA CN105870500B (en) | 2016-05-17 | 2016-05-17 | Stable electrolyte for reducing battery expansion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610331270.XA CN105870500B (en) | 2016-05-17 | 2016-05-17 | Stable electrolyte for reducing battery expansion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105870500A CN105870500A (en) | 2016-08-17 |
| CN105870500B true CN105870500B (en) | 2020-01-17 |
Family
ID=56635614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610331270.XA Active CN105870500B (en) | 2016-05-17 | 2016-05-17 | Stable electrolyte for reducing battery expansion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105870500B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113381074A (en) * | 2021-05-27 | 2021-09-10 | 厦门大学 | Low-temperature electrolyte and application thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051786A (en) * | 2014-06-24 | 2014-09-17 | 东莞市凯欣电池材料有限公司 | Electrolyte, preparation method for same and high-voltage lithium ion battery |
| DE102015008360A1 (en) * | 2015-06-27 | 2015-12-17 | Daimler Ag | Electrochemical energy storage |
| KR20160036807A (en) * | 2014-09-26 | 2016-04-05 | 주식회사 엘지화학 | Non-aqueous liquid electrolyte and lithium secondary battery comprising the same |
| CN105541718A (en) * | 2015-12-29 | 2016-05-04 | 东莞市青麦田数码科技有限公司 | Preparation method of 5-amino-1-(2,6-dihydro-4-(trifluoromethyl)phenyl)-4-(trifluoromethylmercapto)-1H-parazole-3-nitrile |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104701570A (en) * | 2013-12-05 | 2015-06-10 | 华为技术有限公司 | Non-aqueous organic high-voltage electrolyte additive, non-aqueous organic high-voltage electrolyte and lithium ion secondary battery |
-
2016
- 2016-05-17 CN CN201610331270.XA patent/CN105870500B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104051786A (en) * | 2014-06-24 | 2014-09-17 | 东莞市凯欣电池材料有限公司 | Electrolyte, preparation method for same and high-voltage lithium ion battery |
| KR20160036807A (en) * | 2014-09-26 | 2016-04-05 | 주식회사 엘지화학 | Non-aqueous liquid electrolyte and lithium secondary battery comprising the same |
| DE102015008360A1 (en) * | 2015-06-27 | 2015-12-17 | Daimler Ag | Electrochemical energy storage |
| CN105541718A (en) * | 2015-12-29 | 2016-05-04 | 东莞市青麦田数码科技有限公司 | Preparation method of 5-amino-1-(2,6-dihydro-4-(trifluoromethyl)phenyl)-4-(trifluoromethylmercapto)-1H-parazole-3-nitrile |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105870500A (en) | 2016-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Liu et al. | Research Progresses of Liquid Electrolytes in Lithium‐Ion Batteries | |
| CN104505535B (en) | A kind of nonaqueous electrolytic solution of high-voltage lithium ion batteries | |
| CN105703007A (en) | Non-aqueous electrolyte for high-voltage rapid-charging type lithium ion battery | |
| CN101777668A (en) | Electrolyte for lithium manganese battery | |
| CN102593517A (en) | Non-aqueous electrolyte for lithium iron phosphate battery | |
| CN112510259B (en) | Non-aqueous electrolyte and lithium battery | |
| CN102208683B (en) | Electrolyte for improving high-temperature storage performance of lithium-ion secondary battery | |
| CN105720303A (en) | Fluoro-carboxylic ester contained electrolyte for high-voltage lithium ion battery | |
| CN103985904A (en) | Non-aqueous electrolyte capable of improving high-temperature performance for lithium ion battery | |
| CN106602140B (en) | A kind of electrolyte improving polymer lithium ion secondary battery high-temperature behavior | |
| US20170294677A1 (en) | Fluorine-Substituted Propylene Carbonate-Based Electrolytic Solution and Lithium-Ion Battery | |
| CN111697264A (en) | High-voltage lithium ion battery electrolyte | |
| CN110783629B (en) | Electrolyte for lithium secondary battery and lithium secondary battery | |
| CN112310477B (en) | Overcharge-preventing lithium ion battery electrolyte | |
| CN104466247A (en) | Nonaqueous electrolyte and lithium ion battery utilizing same | |
| CN105261791A (en) | Ultra-temperature high-voltage lithium-ion battery electrolyte and lithium-ion battery using electrolyte | |
| CN105742701A (en) | Electrolyte and lithium secondary battery | |
| CN108258312A (en) | A kind of nonaqueous electrolytic solution of high-voltage lithium ion batteries | |
| CN108987810B (en) | Electrolyte and secondary lithium battery suitable for high-temperature environment | |
| CN106025355A (en) | Flame-retardant non-aqueous electrolyte with high safety and processing method thereof | |
| CN113471539A (en) | Electrolyte, preparation method thereof and lithium ion battery | |
| CN106025354A (en) | High-temperature and high-safety non-water electrolyte | |
| WO2023217091A1 (en) | Electrolyte additive, battery electrolyte and use thereof | |
| CN105870500B (en) | Stable electrolyte for reducing battery expansion | |
| CN104466251A (en) | Electrolyte and lithium ion battery using same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A stable electrolyte for reducing battery expansion Granted publication date: 20200117 Pledgee: Bank of Dongying Limited by Share Ltd. Binzhou Zhanhua branch Pledgor: SHANDONG HIRONG POWER SUPPLY MATERIAL Co.,Ltd. Registration number: Y2024980006122 |