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Graphene catalyst

A catalyst, graphene technology, used in electrochemical generators, electrolyte immobilization/gelation, nanotechnology, etc., can solve the problems of changes in the strength and stability of the separator, complicated manufacturing processes, and limited charge and discharge life. Achieve the effect of improving safety and stability, increasing safety and stability, and prolonging service life

Inactive Publication Date: 2016-05-04
宋宏婷
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ion conductivity and mechanical strength of current lithium polymer batteries are relatively poor, the manufacturing process is complex, the battery volume is large, and the battery capacity is not enough. Since the positive active material and negative active material are easy to fall off, the ion conductivity and The electrochemical stability is poor, the strength and stability of the separator will change with the use of the battery, it is easy to cause the lithium polymer battery to age after long-term use, and the life of charge and discharge is greatly limited

Method used

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Examples

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Effect test

Embodiment 1

[0030] Graphene catalyst, oligomeric clathrate silsesquioxane-graphene is prepared by the following steps,

[0031] Step 1: Weigh a portion of γ-mercaptopropyltrimethoxysilane, take an appropriate amount of absolute ethanol as a solvent, and stir evenly, according to the molar ratio of γ-mercaptopropyltrimethoxysilane:phenyltriethoxysilane 1: 1 Add phenyltriethoxysilane to the solution, stir evenly, add tetraethylammonium hydroxide to the solution according to the molar ratio of γ-mercaptopropyltrimethoxysilane: tetraethylammonium hydroxide 1:1.2, Heated to reflux for 48 hours, cooled naturally to normal temperature, evaporated the solvent by a rotary evaporator to obtain a lime milky product, washed the product with a mixed solution of tetrahydrofuran and methanol, and freeze-dried under vacuum to obtain the diamine POSS;

[0032]Step 2: Weigh a portion of graphite powder, add an appropriate amount of concentrated sulfuric acid as a solvent in an ice bath, stir, and control t...

Embodiment 2

[0035] Such as figure 1 As shown, a polymer battery includes a positive electrode sheet 1 and a negative electrode sheet 2 arranged inside the battery casing 6, a separator 5 is arranged between the positive electrode sheet 1 and the negative electrode sheet 2; A positive electrode coating 7 and a positive electrode catalytic network 3 are provided. The positive electrode coating 7 covers the surface of the positive electrode sheet 1, and the positive electrode catalytic network 3 covers the surface of the separator 5; The net 4 and the negative electrode coating 8, the negative electrode catalytic net 4 is covered on the surface of the separator 5, the negative electrode coating 8 is covered on the surface of the negative electrode sheet 2, the positive electrode coating 7 is connected with the positive electrode catalytic net 3, the negative electrode coating 8 is connected to the negative electrode The catalytic nets 4 are connected.

[0036] The positive electrode sheet 1...

Embodiment 3

[0042] Such as figure 2 As shown, the nano-Rh-graphene composite electrode was prepared by the following steps,

[0043] Step 1: Weigh a portion of graphite powder, add an appropriate amount of concentrated sulfuric acid as a solvent in an ice bath, stir, and control the reaction temperature below 20°C, according to the mass ratio of graphite powder: sodium nitrate: potassium permanganate 1 :0.5:3 Slowly add sodium nitrate and potassium permanganate to the solution, stir for 10 minutes; raise the temperature to 35°C, stir for 3 hours, add deionized water to the solution according to the volume ratio of concentrated sulfuric acid: deionized water 1:0.2 , heat up to 98°C, stir for 30 minutes, then add deionized water according to the volume ratio of concentrated sulfuric acid: deionized water 1:0.5, stop the reaction, add 5% hydrogen peroxide to the solution according to the molar ratio of graphite powder: hydrogen peroxide 1:0.2, Heat centrifugation, wash with appropriate amo...

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Abstract

The invention discloses a graphene catalyst, and belongs to the field of a catalyst. The graphene catalyst is prepared through three steps, and the step 1 includes: weighing a part of gamma-mercaptopropyltrimethoxy silane, taking a proper amount of absolute ethanol as a solvent, performing uniform mixing, adding phenyltriethoxysilane to the obtained solution according to a mole ratio of gamma-mercaptopropyltrimethoxy silane to phenyltriethoxysilane being 1:1, performing uniform mixing, adding tetraethylammonium hydroxide to the obtained solution according to a mole ratio of gamma-mercaptopropyltrimethoxy silane to tetraethylammonium hydroxide being 1:1.2, performing heating and a reflux reaction for 48h, naturally cooling the reaction to room temperature, evaporating the solvent out through a rotary evaporator to obtain a lime-milk-shaped product, washing the product with a mixed solvent of tetrahydrofuran and methanol, and performing freeze-drying to obtain diamino-POSS. The graphene catalyst can be applied to a lithium polymer battery, and can effectively improve capacity and a working platform of the battery.

Description

technical field [0001] The invention relates to a catalyst, especially a graphene catalyst. Background technique [0002] Since Pride successfully trial-manufactured the synthetic lead-acid battery in 1859, the chemical power source has entered a budding state. In the course of more than 100 years of development, new series of chemical power sources have emerged continuously, and the performance of chemical power sources has been continuously improved. Especially after World War II, chemical power sources developed more rapidly. Later, Cd-Ni batteries were produced, and MH-Ni batteries were produced in the 1980s. After nearly 20 years of exploration, lithium-ion batteries and lithium polymer batteries were finally developed in the early 1990s, and their development has come to an end. At the stage of commercialization, at present, lithium-ion batteries are valued for their high specific energy density and long service life, and are developing rapidly. Countries and regions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/58H01M4/62H01M10/0525H01M10/0565H01M10/0585B82Y30/00
CPCB82Y30/00H01M4/366H01M4/38H01M4/5825H01M4/624H01M4/625H01M4/628H01M10/0525H01M10/0565H01M10/0585H01M2300/0085Y02E60/10Y02P70/50
Inventor 宋宏婷
Owner 宋宏婷
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