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Method for producing urchin-like nano TixSn1-xO2/graphene three-dimensional composite material and application of composite material on negative electrode of lithium ion battery

A composite material, tixsn1-xo2 technology, applied in the field of nanomaterials science and secondary power supply, can solve the problems of poor electronic conductivity and low theoretical capacity, and achieve the effects of abundant raw materials, simple principle and low price

Inactive Publication Date: 2016-12-21
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that its theoretical capacity is not high (about 170mAh g -1 ) and poor electronic conductivity

Method used

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  • Method for producing urchin-like nano TixSn1-xO2/graphene three-dimensional composite material and application of composite material on negative electrode of lithium ion battery
  • Method for producing urchin-like nano TixSn1-xO2/graphene three-dimensional composite material and application of composite material on negative electrode of lithium ion battery
  • Method for producing urchin-like nano TixSn1-xO2/graphene three-dimensional composite material and application of composite material on negative electrode of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of sea urchin-like nano-Ti x sn 1-x o 2 The preparation method of / graphene three-dimensional composite material comprises the steps:

[0031] (1) Use the improved Hummers method to prepare graphene oxide, take a dry and clean container, add 70ml of concentrated sulfuric acid with a concentration of 98%, put the container in ice water and ice bath; weigh 2g of flake graphite and add it to the ice water bath concentrated sulfuric acid solution, and then mechanically stirred for 20 to 30 minutes; weigh 8g of potassium permanganate and slowly add it to the above solution, as slowly as possible, until the solution turns green and the potassium permanganate is completely added Finally, ice bath for another two hours; then move to a constant temperature water bath at 35°C and stir at a constant speed for 12 hours, turning into a thick yellow-brown slurry; remove the container from the water bath, and divide it into 6 times under stirring, each time Add 46ml of water ...

Embodiment 2

[0036] A kind of sea urchin-like nano-Ti x sn 1-x o 2 The preparation method of / graphene three-dimensional composite material comprises the steps:

[0037] (1) Use the improved Hummers method to prepare graphene oxide, take a dry and clean container, add 60ml of concentrated sulfuric acid with a concentration of 98%, put the container in ice water for an ice bath; weigh 1.5g of flake graphite and add it to the frozen In the concentrated sulfuric acid solution in the water bath, then carry out mechanical stirring for 20-30min; weigh 8g of potassium permanganate and slowly add it to the above solution, as slow as possible when adding, until the solution turns green and the potassium permanganate is completely added. After that, put it in ice bath for another two hours; then move it to a constant temperature water bath at 35°C and stir at a constant speed for 12 hours to form a thick yellow-brown slurry; remove the container from the water bath, and divide it into 6 times under...

Embodiment 3

[0042] A kind of sea urchin-like nano-Ti x sn 1-x o 2 The preparation method of / graphene three-dimensional composite material comprises the steps:

[0043] (1) Prepare graphene oxide by the improved Hummers method, take a dry and clean container, add 70ml of concentrated sulfuric acid with a concentration of 98%, put the container in ice water for an ice bath; weigh 1.5g of flake graphite and add it to the ice In the concentrated sulfuric acid solution in the water bath, then carry out mechanical stirring for 20-30min; weigh 8g of potassium permanganate and slowly add it to the above solution, as slow as possible when adding, until the solution turns green and the potassium permanganate is completely added. After that, put it in ice bath for another two hours; then move it to a constant temperature water bath at 35°C and stir at a constant speed for 12 hours to form a thick yellow-brown slurry; remove the container from the water bath, and divide it into 6 times under stirri...

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Abstract

The invention discloses a method for producing an urchin-like nano TixSn1-xO2 / graphene three-dimensional composite material and an application of the composite material on a negative electrode of a lithium ion battery. The urchin-like nano TixSn1-xO2 / graphene three-dimensional composite material is produced by a one-step hydro-thermal synthesis technology through self-assembly by using a coordination principle and a molecule self-assembly method. The method comprises the following steps: 1) preparing oxidized graphene, 2) preparing a graphite oxide sol with surface having negative electricity; and 3) producing the urchin-like nano TixSn1-xO2 / graphene three-dimensional composite material through reduction. The reaction process is carried out in an aqueous solution, other reagents are not required, and the method has the advantages of simple process, low cost, energy saving, environmental protection, and easy industrial batch production. As the negative electrode material of lithium ion battery, the three-dimensional composite structure of the material is in favor of diffusion of an electrolyte in the composite material as well as transmission of electron and ion in the material, and performances such as charge and discharge capacity, cycle life and multiplying power of the composite material can be effectively increased.

Description

technical field [0001] The invention belongs to the field of nanomaterial science and secondary power supply technology, in particular to a sea urchin-shaped nano-Ti x sn 1- x o 2 / Graphene three-dimensional composite material preparation method and its application in lithium-ion battery negative electrode. Background technique [0002] At present, lithium-ion batteries occupy an absolute dominant position in various portable electronic devices and are regarded as the most commercially promising power substitutes for the next generation of popular electric / hybrid vehicles. In order to store and transport electric energy more efficiently, researchers have been devoting themselves to exploring various high-energy anode materials for the next generation of rechargeable lithium-ion batteries, such as theoretical specific capacities as high as 782 mA h g -1 Tin dioxide (SnO 2 ). However, due to the poor conductivity of the material itself, it is not conducive to the charge ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1391H01M4/36H01M4/13
CPCH01M4/13H01M4/1391H01M4/362Y02E60/10
Inventor 张建民董玉涛刘玉山李丹陈卫华
Owner ZHENGZHOU UNIV
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