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A comb-shaped polysiloxane and its solid electrolyte, preparation method and application

A technology of solid electrolyte and polysiloxane, which is applied in the direction of circuits, electrical components, secondary batteries, etc., can solve problems such as poor electrical conductivity, and achieve the effects of improving mechanical properties, promoting dissociation, and strong exercise ability

Active Publication Date: 2016-03-30
王海斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the defect of poor electrical conductivity of the all-solid-state polymer lithium-ion battery in the prior art, and the first purpose is to provide a comb-shaped polysiloxane with a novel structure, which can be used as Key raw materials to prepare solid electrolytes with high conductivity at low temperatures

Method used

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  • A comb-shaped polysiloxane and its solid electrolyte, preparation method and application
  • A comb-shaped polysiloxane and its solid electrolyte, preparation method and application
  • A comb-shaped polysiloxane and its solid electrolyte, preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Take 2g of hydrogen-containing siloxane (molecular weight 1900-2100g / mol), add 0.0322mol of tris(2-methoxyethoxy)vinyl siloxane and vinyl cyclic carbonate, tri( The amount of substance of 2-methoxyethoxy) vinyl siloxane is 0.00970mol (8.82g), the amount of substance of vinyl cyclic carbonate is 0.0225mol (0.526g), that is, the amount of substance of both Quantitative ratio 3:7, 0.01g Castel catalyst was placed in a two-necked flask, 5.673g of anhydrous toluene was added as a solvent, and the reflux reaction was carried out at 110°C for 24h under the protection of argon, and the obtained colloidal polymer was lithium-conducting silicon oxide alkane polymers. In an argon atmosphere, take 1g of the polymer, 0.2g of PVDF (molecular weight 1 million), 0.3g of LiN(SO 2 CF 3 ) 2 Dissolve in 3g of N-methylpyrrolidone and stir until uniform. The solution stirred until uniform was cast-coated on stainless steel, and dried at 80° C. for 36 hours under an argon protective atmos...

Embodiment 2

[0046] Take 2g of hydrogen-containing siloxane (molecular weight 1900-2100g / mol), add 0.0333mol of tris(2-methoxyethoxy)vinyl siloxane and vinyl cyclic carbonate, tri( The amount of substance of 2-methoxyethoxy) vinyl siloxane is 0.0300mol (8.82g), the amount of substance of vinyl cyclic carbonate is 0.00333mol (0.526g), that is, the amount of substance of both Quantitative ratio 9:1, 0.01g Castel catalyst was placed in a two-necked flask, 5.673g of anhydrous toluene was added as a solvent, and refluxed at 110°C for 6h under the protection of argon, the obtained colloidal polymer was lithium-conducting silicon oxide alkane polymers. In an argon atmosphere, take 0.8g of the polymer, 0.15g of PEO (molecular weight 1 million), 0.05g of LiN(SO 2 CF 3 ) 2 Dissolve in 1g of acetonitrile and stir until uniform. The solution stirred until uniform was cast-coated on the lithium iron phosphate positive electrode sheet, and dried at 60° C. for 50 h under a relative vacuum of -70 KPa ...

Embodiment 3

[0048] Take 2g of hydrogen-containing siloxane (molecular weight 1900-2100g / mol), add the total amount of 0.0278mol of vinyl triethoxysilane and allyl methyl carbonate, vinyl triethoxysilane The amount is 0.00278mol (0.450g), the amount of allyl methyl carbonate is 0.0250mol (2.9g), that is, the ratio of the two substances is 1:9, and the 0.133 chloroplatinic acid catalyst is placed in a two-necked flask , adding 3.745g of anhydrous benzene as a solvent, under the protection of nitrogen, reflux at 80°C for 48h, and the obtained colloidal polymer is lithium-conducting siloxane polymer. In an argon atmosphere, take 0.6g of the polymer, 0.3g of PVDF (molecular weight of 700,000), 0.1g of LiC 4 BO 8 Dissolve in 5g of N-methylpyrrolidone and stir until uniform. The solution that was stirred until uniform was cast-coated on stainless steel, and dried at 80°C for 36 hours under a relative vacuum of -85KPa to obtain an electrolyte film with a certain thickness.

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Abstract

The invention discloses a comb polysilicone and solid electrolyte, a preparation method and application thereof. Through additive reaction of polymethyl hydrogen siloxane with olefinic hydrocarbon, an alkoxysilane group and a carbonic ester group are led onto a branch chain, and the comb polysilicone is prepared. The preparation method is simple and the cost is low; the solid electrolyte prepared by taking the comb polysilicone as main raw material is high in electric conductivity at a low temperature, the electric cycling performance of the prepared all solid lithium ion battery is excellent, and the select range and the application field of the solid electrolyte material are expanded.

Description

technical field [0001] The invention relates to a comb-shaped polysiloxane and its solid electrolyte, a preparation method and application, and belongs to the field of preparation technology and application of lithium-ion battery materials. Background technique [0002] Lithium-ion batteries have the characteristics of high energy density and long service life. Since they were put into the market in 1991, they have been attracting attention. They are widely used in small and medium-sized battery fields such as mobile phones, notebook computers, electric tools, and electric bicycles. They have become the energy economy of the 21st century. an integral part of it. Lithium-ion battery products currently on the market mainly use carbonate-based electrolytes as electrolytes, which are combined with microporous diaphragms to build ion conduction and electronic insulation transmission channels between the positive and negative electrodes, and realize lithium ions between the positi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/38H01M10/0565
CPCY02E60/10
Inventor 刘晋李劼林月袁长福姚和华
Owner 王海斌
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