Composite all-solid-state polymer electrolyte and preparation method thereof

An all-solid polymer and electrolyte technology, which is applied in the manufacture of electrolyte batteries, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of unstable electrochemical properties of electrolytes, achieve improved interface compatibility, improve mechanical properties, and improve electrochemical performance. stable effect

Active Publication Date: 2015-03-25
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a high-loaded ionic liquid is added to the electrolyte system by physical blending, an

Method used

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  • Composite all-solid-state polymer electrolyte and preparation method thereof
  • Composite all-solid-state polymer electrolyte and preparation method thereof
  • Composite all-solid-state polymer electrolyte and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～4

[0046] (1)IL-SiO2 2 preparation of

[0047] Add a certain proportion of polyoxyethylene-polyoxypropylene-polyoxyethylene block copolymer (P123), 12mol / L HCl aqueous solution, and deionized water into the flask, stir at 40°C until P123 is completely dissolved, and orthosilicic acid Add ethyl ester to the flask, continue stirring for 24 hours, raise the temperature to 90°C, stop stirring, crystallize for 24 hours, wash with deionized water and ethanol after separation by suction filtration, extract at 130°C for 24 hours, and extract the powder Dry in a vacuum oven at 80°C for 4 hours to obtain mesoporous SiO 2 .

[0048] Mesoporous SiO 2Disperse in dewatered DMF solvent and sonicate for 1h. Dissolve the quantitative IL in the dewatered dimethylformamide (DMF) solvent, and add dropwise 4-dimethylaminopyridine (DMAP) and dicyclohexyl in the ice-water bath and stirring condition, respectively. Carbodiimide (DCC), after 1h dropwise addition of mesoporous SiO 2 Dispersions. Af...

Embodiment 5

[0070] A composite all-solid polymer electrolyte, which is prepared by using the raw materials of the following components and contents;

[0071] Carboxylated nitrile rubber 1kg; vulcanizing agent 0.02kg; lithium salt 0.2kg; IL-SiO 2 0.01kg. Among them, the Mooney viscosity ML of carboxylated nitrile rubber 1+4 It is 40 at 100°C, wherein the content of acrylonitrile is 27wt%, and the content of carboxyl group is 5wt%. The vulcanizing agent is dicumyl peroxide. The lithium salt is lithium bistrifluoroformimide, and its structural formula is as follows:

[0072]

[0073] IL-SiO 2 It is a complex of 1-carboxymethyl-3-methylimidazole bistrifluoromethanesulfonimide salt (ionic liquid, abbreviated as IL) and mesoporous silica. The molecular structure of IL is as follows:

[0074]

[0075] Mesoporous SiO 2 The pore size is 4nm, and it is prepared by the following method: add polyoxyethylene-polyoxypropylene-polyoxyethylene block copolymer, 12mol / L HCl aqueous solution, an...

Embodiment 6

[0086] A composite all-solid polymer electrolyte, which is prepared by using the following components and contents of raw materials:

[0087] Carboxylated nitrile rubber 1kg; vulcanizing agent 0.03kg; lithium salt 0.6kg; IL-SiO 2 0.5kg. Among them, the Mooney viscosity ML of carboxylated nitrile rubber i+4 It is 50 at 100°C, wherein the acrylonitrile content is 29 wt%, and the carboxyl content is 7 wt%. The vulcanizing agent is dicumyl peroxide. The lithium salt is lithium bistrifluoroformimide, and its structural formula is as follows:

[0088]

[0089] IL-SiO 2 It is a complex of 1-carboxymethyl-3-methylimidazole bistrifluoromethanesulfonimide salt (ionic liquid, abbreviated as IL) and mesoporous silica. The molecular structure of IL is as follows:

[0090]

[0091] Mesoporous SiO 2The pore size is 8nm, and it is prepared by the following method: add polyoxyethylene-polyoxypropylene-polyoxyethylene block copolymer, 12mol / L HCl aqueous solution, and deionized wate...

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Abstract

The invention relates to a composite all-solid-state polymer electrolyte and a preparation method thereof. The composite all-solid-state polymer electrolyte is prepared by adopting the following components and raw materials in parts by weight: 1 part of carboxylic acrylonitrile butadiene rubber, 0.02-0.03 part of vulcanizing agents, 0.2-0.6 part of lithium salt and 0.01-0.5 part of a compound (IL-SiO2) of 1-carboxymethyl-3-methylimidazole bis(trifluoromethane)sulfonimide salt and mesoporous silica. The preparation method comprises the following steps of: dissolving the carboxylic acrylonitrile butadiene rubber, the lithium salt and the vulcanizing agents into a butanone solution, carrying out ultrasonic dispersion on IL-SiO2 in a butanone solution for 1 hour, mixing, and mechanically stirring for 1 hour; then flatly paving a mixture in a watch glass for normal-temperature evaporation, and after a solution is completely volatilized, milling on a double-roller open mill at the roller temperature of 20-40 DEG C for 1-5 minutes; finally vulcanizing by adopting a press plate vulcanizing machine so as to prepare the composite all-solid-state polymer electrolyte. Compared with the prior art, the composite all-solid-state polymer electrolyte prepared through the method disclosed by the invention has the advantages of higher room-temperature conductivity and excellent mechanical properties.

Description

technical field [0001] The invention relates to an electrolyte and a preparation method thereof, in particular to a composite all-solid polymer electrolyte and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the characteristics of high mass specific energy, good fast charging and discharging performance, and long service life. They are widely used in portable electronic products such as mobile phones, camcorders, and notebook computers. The electrolyte currently used in lithium-ion batteries is basically an electrolyte solution in which lithium salts are dissolved. There are safety problems such as leakage, flammability, and explosion, so polymer electrolytes have attracted widespread attention. [0003] Polymer electrolytes are divided into all-solid polymer electrolytes and gel polymer electrolytes. The former is a system composed of polymer bodies and salts or inorganic fillers. Due to the limited dissolution of lithium salts, the c...

Claims

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Application Information

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IPC IPC(8): H01M10/0565
CPCH01M10/0565H01M10/058Y02E60/10
Inventor 陆艳博林琼任文坛张勇
Owner SHANGHAI JIAO TONG UNIV
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