Method for preparing tin dioxide/graphene-compounded anode material of lithium ion battery

A graphene composite, lithium-ion battery technology, applied in battery electrodes, circuits, electrical components and other directions, can solve problems affecting the electrochemical performance of lithium-ion battery negative electrode materials, etc., to achieve large-scale industrial production, raw material components are common and easy to obtain. , the effect of promoting the application

Active Publication Date: 2013-05-01
SHENZHEN KEXIN COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the above-mentioned reaction system will have a negative impact on the preparation of the tin dioxide/graphene composite lithium ion battery ne

Method used

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  • Method for preparing tin dioxide/graphene-compounded anode material of lithium ion battery
  • Method for preparing tin dioxide/graphene-compounded anode material of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 27g of choline chloride [purchased from Aladdin Reagent (Shanghai) Co., Ltd.] and 24g of ethylene glycol were stirred and mixed to obtain 51g of base solution (about 50mL). Dissolve 0.015g of graphene oxide powder into the base liquid to obtain a uniform mixed liquid. Then, 0.6 g of stannous chloride was added to the above mixture, and an ultrasonic oscillation reaction was performed for 5 hours in an ultrasonic cleaning machine with a power of 200 W and a frequency of 100 KHz. The obtained product was transferred to a centrifuge tube for centrifugation, and then the obtained precipitate was washed alternately with methanol and deionized water. After cleaning, it was dried in a vacuum oven at 60°C for 10 hours to obtain a black solid powder, which was the present product. Invented tin dioxide / graphene composite lithium-ion battery anode material.

[0028] The transmission electron microscope photograph of the lithium-ion battery negative electrode material of the tin d...

Embodiment 2

[0030] 27g of choline chloride [purchased from Aladdin Reagent (Shanghai) Co., Ltd.] and 24g of ethylene glycol were stirred and mixed to obtain 51g of base solution (about 50mL). Dissolve 0.008g of graphene oxide powder into the base liquid to obtain a uniform mixed liquid. Then, 0.48 g of stannous chloride was added to the above mixture, and an ultrasonic oscillation reaction was performed for 3 hours in an ultrasonic cleaning machine with a power of 200 W and a frequency of 50 KHz. The obtained product was transferred to a centrifuge tube for centrifugation, and then the obtained precipitate was washed alternately with methanol and deionized water. After cleaning, it was dried in a vacuum oven at 60°C for 10 hours to obtain a black solid powder, which was the present product. Invented tin dioxide / graphene composite lithium-ion battery anode material.

[0031] According to the transmission electron microscope photos, it can be seen that the tin dioxide nanoparticles obtaine...

Embodiment 3

[0033] 27g of choline chloride [purchased from Aladdin Reagent (Shanghai) Co., Ltd.] and 24g of ethylene glycol were stirred and mixed to obtain 51g of base solution (about 50mL). Dissolve 0.010 g of graphene oxide powder into the base liquid to obtain a uniform mixed liquid. Then, 0.55 g of stannous chloride was added to the above mixture, and an ultrasonic oscillation reaction was performed for 4 hours in an ultrasonic cleaning machine with a power of 200 W and a frequency of 100 KHz. The obtained product was transferred to a centrifuge tube for centrifugation, and the obtained precipitate was washed alternately with methanol and deionized water. After cleaning, it was dried in a vacuum oven at 90°C for 5 hours to obtain a black solid powder, which was the present product. Invented tin dioxide / graphene composite lithium-ion battery anode material.

[0034] According to the transmission electron microscope photos, it can be seen that the tin dioxide nanoparticles obtained in...

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Abstract

The invention discloses a method for preparing a tin dioxide/graphene-compounded anode material of a lithium ion battery. The method comprises the following steps: uniformly mixing choline chloride, ethylene glycol and graphene oxide to obtain a mixed solution, adding stannous chloride to the mixed solution, performing ultrasonic oscillating reaction, and performing post-processing to obtain the product. According to the method for preparing the tin dioxide/graphene-compounded anode material of the lithium ion battery, a normal-pressure and normal-temperature one-step method is adopted, the adopted raw materials are simple in components and common and easy to obtain, the reaction conditions are mild and controllable, the reaction can be performed at normal temperature and normal pressure, and the preparation process is simple and practicable, has low requirements for equipment so as to be free from geographical restrictions, and is suitable for large-scale industrial production. The prepared tin dioxide/graphene-compounded anode material of the lithium ion battery has excellent electrochemical properties, and can be used as an active electrode substance for preparing an anode of the lithium ion battery so as to have a wide market application prospect.

Description

technical field [0001] The invention belongs to the technical field of materials and chemical power sources, and in particular relates to a preparation method of a tin dioxide / graphene composite lithium ion battery negative electrode material. Background technique [0002] The rapid development of new high-energy chemical power supply technology has put forward higher requirements for lithium-ion battery electrode materials. Lithium-ion battery electrode materials with high energy density, high power density, and good charge-discharge cycle characteristics have attracted extensive attention. At the same time, the use of low-cost and environmentally friendly preparation processes has become the focus of research on the development of new battery materials. At present, carbon materials (including graphite, soft carbon, and hard carbon) are the main anode materials for commercial lithium-ion batteries. However, the lithium storage capacity of carbon materials is low (the theo...

Claims

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Application Information

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IPC IPC(8): H01M4/48
CPCY02E60/12Y02E60/10
Inventor 黄辉吕焕祥张立军毛秦钟甘永平陶新永范明峰
Owner SHENZHEN KEXIN COMM TECH
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