Method for preparing stannic oxide battery anode material on carbon nano tube by using electro-deposition process

Abstract

The invention discloses a method for preparing a stannic oxide battery anode material on a carbon nano tube by using an electro-deposition process. The method comprises the steps of: making electro-deposition solution, treating the solution with water bath, preparing the carbon nano tube pole piece, pressing on a foam nickel base, putting the base carrying the carbon nano tube pole piece into the electro-deposition solution so as to perform vacuum treatment, and then perform the electro-deposition treatment under a constant current on the vacuumized pole piece so as to acquire the battery anode material on the carbon nano tube carrying the stannic oxide. The battery anode material prepared by using the method has higher power property and has a quality specific capacity kept between 350 and 450 F / g under a high scanning speed of 200 mV / s. The material applied in a super capacitor has higher volumetric properties, excellent cycling stability and long cycling life, first discharging specific capacity ranged between 410 and 588 F / g under a constant current density of 15 A / g, cycling times more than 5000 times and specific capacity retention rate ranged between 90 to 95 percent.

Description

technical field [0001] The present invention relates to a preparation method of electrode battery material, more particularly, to a method of preparing tin dioxide material on carbon nanotubes by electrodeposition method. Background technique [0002] Carbon nanotubes are nano-scale tubular materials rolled up by single-layer or multi-layer graphite surfaces. Due to their unique hollow structure, good electrical conductivity, large specific surface area and intertwined nano-scale network structure, they are used as super When the capacitor electrode material is used, it can store energy through the electric double layer capacitance, and has high specific power and good cycle performance, but the specific capacity is low. Tin dioxide is an n-type semiconductor oxide with a wide energy gap, which is inexpensive and environmentally friendly. When used as an electrode material for supercapacitors, it can store energy through a fast surface Faradaic reaction, with a high specific...

AI Technical Summary

Problems solved by technology

[0002] Carbon nanotubes are nano-scale tubular materials rolled by single-layer or multi-layer graphite surfaces. Due to their unique hollow structure, good electrical conductivity, large specific surface area and nano-scale network structure formed by intertwining, as a super When the capacitor electrode material is used, it can store energy through the electric double layer capacitance, which has high specific power and good cycle performance, but the specific capacity is low

Tin dioxide is an n-type semiconductor oxide with a wide energy gap. It is cheap and has good environmental friendliness. When it is used as an electrode material for a supercapacitor, it can store energy through a fast Faradaic reaction on the surface and has a high specific capacity, but the electrode reaction Poor reversibility and poor power performance

These preparation methods are cumbersome and the binding force between tin dioxide and carbon nanotubes is small, and particle agglomeration is prone to occur when used as an electrode material.

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