A kind of preparation method of carbon nanotube doped tin oxide negative electrode material for lithium ion battery

A lithium-ion battery, carbon nanotube technology, applied in battery electrodes, secondary batteries, electrochemical generators, etc., can solve the problems of high cost, poor cycle performance, serious environmental pollution, etc., and achieve controllable cost and specific capacity. Effects of reduced attenuation and lower heat treatment temperature
CN103490053BActive Publication Date: 2015-10-07XIANGTAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIANGTAN UNIV
Publication Date
2015-10-07

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Abstract

The invention discloses a CNTs (carbon nanotubes)-doped tin oxide negative electrode material for a lithium-ion battery and a preparation method thereof. The preparation method comprises the following steps: firstly, compositely electroplating a CNTs-doped tin plating layer with the thickness of 10-15 microns on one side of the surface of a substrate of a pretreated copper strip; and secondly, anodizing the material obtained in the first step to obtain a mesoporous oxide, and performing heat treatment to finally obtain the lithium-ion battery negative electrode material with CNTs-uniformly-doped mesoporous tin oxide layer on one side of the surface of the substrate of the copper strip. The mesoporous diameter is 3-10nm and the obtained oxide layer has the thickness of 5-10 microns. The first specific discharge capacity of the lithium-ion battery negative electrode material can be as high as 650mAh / g, and after 50 cycles, the specific capacity is attenuated by only 0.8%-5%. The preparation method is simple in process, and large-scale industrial production can be carried out.
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Description

technical field

[0001] The invention relates to a lithium ion battery negative electrode material, in particular to a carbon nanotube-doped tin oxide negative electrode material and a preparation method thereof. Background technique

[0002] Lithium-ion batteries have the advantages of high energy density, high power density, good safety performance, long cycle life, etc., and do not contain lead, cadmium, mercury and other pollutants, so they are an ideal energy storage device. As one of the core components of lithium-ion batteries, anode materials have an important impact on improving the capacity and cycle life of lithium-ion batteries, and have received great attention from academia and industry. The anode material that has been industrially produced is a carbon material, and its theoretical specific capacity is 372mAh / g. At present, the practically used carbon anode capacity is very close to its theoretical specific capacity, and it is unlikely to further increase the s...

Claims

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