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Composite gel polymer electrolyte based on porous carbon material with ultrahigh specific surface area and preparation method and application thereof

A technology of ultra-high specific surface area and porous carbon materials, which is applied in the direction of composite electrolyte, electrolyte battery manufacturing, non-aqueous electrolyte battery, etc., can solve the problems of low porosity, small amount of liquid electrolyte, and inability to achieve high conductivity, etc. Ionic conductivity and the effect of improving the liquid absorption rate

Active Publication Date: 2020-02-14
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Composite inorganic nanomaterials can further improve the mechanical strength, electrical conductivity and other properties of the gel polymer electrolyte. At present, the composite inorganic nanomaterials such as silica and alumina have low porosity, which makes the amount of liquid electrolyte adsorbed in the gel electrolyte relatively small. less, high conductivity cannot be achieved

Method used

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  • Composite gel polymer electrolyte based on porous carbon material with ultrahigh specific surface area and preparation method and application thereof
  • Composite gel polymer electrolyte based on porous carbon material with ultrahigh specific surface area and preparation method and application thereof
  • Composite gel polymer electrolyte based on porous carbon material with ultrahigh specific surface area and preparation method and application thereof

Examples

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Embodiment 1

[0052] (1) Mix 100 ml of 0.5 mol / L sodium citrate ethanol aqueous solution and 100 ml of 0.3 mol / L cobalt nitrate ethanol aqueous solution, wherein the volume ratio of ethanol and water is 1:1, and then add 50 ml of 0.2 mol / L aqueous solution of potassium iron hydride, stirred evenly, put the mixed solution into the reaction kettle, sealed it, and reacted it under 100°C for 12 hours. After the reaction was completed, the temperature was naturally lowered, washed with deionized water for three times, and air-dried at 100°C to Constant weight to obtain a purple solid powder.

[0053] (2) After calcining the purple solid powder in a muffle furnace at a high temperature of 700° C. for 6 hours, a black porous cobalt oxide-iron-carbon composite electrode material was obtained.

[0054] (3) Soak the black porous cobalt-iron-carbon composite electrode material in 2mol / L aqueous hydrochloric acid solution for 24 hours, then wash with deionized water, filter, and dry at 100°C for 12 ho...

Embodiment 2

[0057] (1) Mix 100 ml of 0.5 mol / L sodium citrate ethanol solution and 100 ml of 0.5 mol / L cobalt nitrate ethanol solution, wherein the volume ratio of ethanol and water is 1:1, and then add 50 ml of 0.1 mol dropwise / L aqueous solution of potassium iron hydride, stir evenly, put the mixed solution into the reaction kettle, seal it, and react it with water heat at 100°C for 10 hours. Constant weight to obtain a purple solid powder.

[0058] (2) After calcining the purple solid powder in a muffle furnace at a high temperature of 600° C. for 5 hours, a black porous cobalt oxide-iron-carbon composite electrode material was obtained.

[0059] (3) Soak the black porous structure cobalt-iron-carbon composite electrode material in 1mol / L aqueous hydrochloric acid solution for 24 hours, then wash with deionized water, filter, and dry at 100°C for 12 hours to obtain a black porous structure carbon material.

[0060] (4) Dissolve the black porous structure carbon material and polyviny...

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Abstract

The invention discloses composite gel polymer electrolyte based on a porous carbon material with an ultrahigh specific surface area and a preparation method and an application thereof. The method comprises steps that 1, raw materials are prepared; firstly, sodium citrate, cobalt nitrate and potassium iron hydride are subjected to hydrothermal reaction to prepare solid powder, high-temperature roasting and acid soaking of the solid powder are performed to prepare a porous structure carbon material, the porous structure carbon material is compounded with polyvinylidene fluoride-hexafluoropropylene copolymer to prepare a polymer film, and lastly the polymer film is activated in the electrolyte to obtain the porous carbon material composite gel polymer electrolyte. The method is advantaged inthat the porous carbon material is prepared by utilizing a metal frame structure, then further etched to prepare the porous carbon material with the ultrahigh specific surface area, and then compounded with the gel electrolyte so that the liquid absorption rate of the gel electrolyte can be greatly improved, and ionic conductivity of the electrolyte film is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a composite gel polymer electrolyte based on a super-high specific surface area porous carbon material and its preparation method and application. Background technique [0002] Due to its high energy density, no memory effect, low price, green and pollution-free, etc., lithium-ion batteries are widely used as mobile power sources in 3C electronic products such as mobile phones, notebook computers, and digital cameras. They are also used as power sources in automobiles. , ships, etc., used as energy storage batteries for wind power generation, solar power generation, signal tower backup power, etc. At present, lithium-ion batteries have successfully occupied the 3C product market, but their performance in the field of electric vehicles is far from satisfactory. A number of recent car fires have raised considerable concerns about lithium-ion batteries. Battery safet...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M10/0565
CPCH01M10/0565H01M10/058H01M2300/0088Y02E60/10Y02P70/50
Inventor 郑文芝孙瑞瑞薛召李林林杨伟邹汉波陈胜洲
Owner GUANGZHOU UNIVERSITY
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