Preparation method and application for nanosheet formed by carbon-coated titanium dioxide nanotube

一种碳包覆二氧化钛纳米管组成的纳米片的制备方法及应用

Abstract

本发明涉及一种碳包覆二氧化钛纳米管组成的纳米片的制备方法及应用,属于锂离子电池电极材料制备技术领域。本发明所述方法首先制备二氧化钛纳米管组成的纳米片;然后将二氧化钛纳米管组成的纳米片与葡萄糖溶液水热反应、碳化后得到碳包覆二氧化钛纳米管组成的纳米片;将碳包覆二氧化钛纳米管组成的纳米片与高锰酸钾溶液反应后,得到二氧化锰包覆的碳包覆二氧化钛纳米管组成的纳米片;将二氧化锰包覆的碳包覆二氧化钛纳米管组成的纳米片与含铁盐溶液水热反应后、退火,得到负载三氧化二铁的碳包覆二氧化钛纳米管组成的纳米片。本发明制备得到的纳米片作为锂电池阳极材料组装电池,制备的锂离子电池具有较高的放电比容量。
The invention relates to a preparation method and an application for a nanosheet formed by a carbon-coated titanium dioxide nanotube, and belongs to the technical field of lithium ion battery electrode material preparation. The preparation method comprises the steps of preparing the nanosheet formed by the titanium dioxide nanotube firstly; then performing a hydrothermal reaction between the nanosheet formed by the titanium dioxide nanotube and a glucose solution, and performing carbonization to obtain the nanosheet formed by the carbon-coated titanium dioxide nanotube; makingthe nanosheet formed by the carbon-coated titanium dioxide nanotube react with a potassium permanganate solution to obtain the manganese dioxidecoated nanosheet formed by the carbon-coated titanium dioxide nanotube; performing a hydrothermal reaction between the manganese dioxidecoated nanosheet formed by the carbon-coated titanium dioxide nanotube and a ferric salt-containing solution, and then performing annealing to obtain the nanosheet formed by the carbon-coated titanium dioxide nanotube loaded with iron trioxide. The nanosheet prepared by the invention is used as the lithium battery positive electrode material for assembling batteries and the prepared lithium ion battery is relatively high in the specific discharge capacity.

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Patent Citations (3)

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