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A kind of graphene nanomaterial composite for lithium electronic battery electrode and preparation method thereof

A lithium electronic battery and nanomaterial technology, which is applied in the field of graphene nanomaterial composites for lithium electronic battery electrodes and their preparation, can solve problems such as the decrease in rate performance of electrode materials, and achieve improved electrochemical performance, prevention of excessive shrinkage, prevention of The effect of shedding and agglomeration

Active Publication Date: 2021-03-23
SUZHOU YUDESHUI ELECTRIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the negative electrode material prepared by the traditional process of loading tin dioxide on the surface of graphene has a significant decrease in the rate performance of the electrode material after repeated charge and discharge. Therefore, it is necessary to study a reusable graphene nanomaterial composite for lithium electronic battery electrodes.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A graphene nanomaterial composite for electrodes of lithium electronic batteries, mainly comprising: 15 parts of modified graphene oxide, 28 parts of carboxymethyl chitosan, 8 parts of tin dioxide and 7 parts of glucose oxide in parts by weight polysaccharides.

[0033] A preparation method of a graphene nanomaterial composite for lithium electronic battery electrodes, the preparation method of the graphene nanomaterial composite for lithium electronic battery electrodes mainly includes the following preparation steps:

[0034] (1) Mix carboxymethyl chitosan and dextran in a beaker at a mass ratio of 5:1, and add water 20 times the mass of carboxymethyl chitosan to the beaker at a temperature of 30°C and a speed of After stirring and mixing under the condition of 380r / min for 30min, the mixed solution was obtained. The mixed solution was dropped into the hydrochloric acid solution with a mass fraction of 8% at a rate of 8mL / min, and stirred and dispersed under the condi...

Embodiment 2

[0042] A graphene nanomaterial composite for electrodes of lithium electronic batteries, mainly comprising: 15 parts of graphene oxide, 28 parts of carboxymethyl chitosan, 8 parts of tin dioxide and 7 parts of oxidized dextran in parts by weight .

[0043] A preparation method of a graphene nanomaterial composite for lithium electronic battery electrodes, the preparation method of the graphene nanomaterial composite for lithium electronic battery electrodes mainly includes the following preparation steps:

[0044] (1) Mix carboxymethyl chitosan and dextran in a beaker at a mass ratio of 5:1, and add water 20 times the mass of carboxymethyl chitosan to the beaker at a temperature of 30°C and a speed of After stirring and mixing under the condition of 380r / min for 30min, the mixed solution was obtained. The mixed solution was dropped into the hydrochloric acid solution with a mass fraction of 8% at a rate of 8mL / min, and stirred and dispersed under the condition of 280r / min for ...

Embodiment 3

[0051] A graphene nanomaterial composite for lithium electronic battery electrodes, mainly comprising: 15 parts of modified graphene oxide, 28 parts of carboxymethyl chitosan, 8 parts of tin dioxide and 7 parts of dextran sugar.

[0052] A preparation method of a graphene nanomaterial composite for lithium electronic battery electrodes, the preparation method of the graphene nanomaterial composite for lithium electronic battery electrodes mainly includes the following preparation steps:

[0053] (1) Mix carboxymethyl chitosan and dextran in a beaker at a mass ratio of 5:1, and add water 20 times the mass of carboxymethyl chitosan to the beaker at a temperature of 30°C and a speed of After stirring and mixing under the condition of 380r / min for 30min, the mixed solution was obtained. The mixed solution was dropped into the hydrochloric acid solution with a mass fraction of 8% at a rate of 8mL / min, and stirred and dispersed under the condition of 280r / min for 60min. To obtain a...

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Abstract

The invention discloses a graphene nano-material composite for lithium electronic battery electrodes and a preparation method thereof, and relates to the technical field of lithium battery materials. The present invention first reacts graphene oxide and ethylenediamine together to obtain modified graphene oxide, then mixes dextran and carboxymethyl chitosan, and cross-links to obtain microspheres, followed by microspheres After oxidation treatment with potassium periodate, it is mixed with modified graphene oxide dispersion to obtain modified microspheres. Finally, after mixing modified microspheres with tin source aqueous solution, they are placed in a carbonization furnace for carbonization to obtain Graphene nanomaterial composites for lithium-ion battery electrodes. The graphene nano-material composite for lithium electronic battery electrodes prepared by the invention has excellent electrochemical performance, and after repeated use, it still has good coulombic efficiency.

Description

technical field [0001] The invention relates to the technical field of lithium battery materials, in particular to a graphene nanomaterial composite for lithium electronic battery electrodes and a preparation method thereof. Background technique [0002] The increasingly prominent problems of environmental pollution and energy crisis make the development of sustainable new energy and the construction of a low-carbon society a top priority. As a green, new type, high-energy battery, lithium-ion batteries have attracted much attention and are widely used in portable electronic products, electric vehicles and energy storage devices. The performance of the anode material of a lithium-ion battery has a great influence on the performance of the entire battery, and the improvement of the capacity and stability of the anode material is crucial to the improvement of the performance of the entire battery. [0003] As a negative electrode material that can provide high theoretical spe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184C01G19/02H01M4/48H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B2204/22C01G19/02C01P2004/80C01P2006/40C01B32/184H01M4/483H01M4/625H01M10/0525Y02E60/10
Inventor 王跃
Owner SUZHOU YUDESHUI ELECTRIC TECH CO LTD