Titanium dioxide nano particle anode material of lithium ion power battery and method for preparing titanium dioxide nano particle anode material

Abstract

The invention discloses a titanium dioxide nano particle anode material of a lithium ion power battery. The anode material is prepared by using a method comprising the following steps of: (1) preparation of a precursor solution, namely dripping isopropyl titanate into a hydrochloric acid solution, uniformly stirring the mixture, adding cetyl ammonium bromide into deionized water, stirring the mixture until the cetyl ammonium bromide is dissolved to obtain a settled solution, mixing the hydrochloric acid solution with the settled solution, uniformly stirring the mixture to obtain a settled mixed solution, mixing the mixed solution with ethanediol, and stirring the mixture to obtain the precursor solution; and (2) adding the precursor solution into a microwave hydrothermal reaction device for reaction, stirring, and washing a solid product after the reaction to obtain the titanium dioxide nano particle anode material of the lithium ion power battery. Sea urchin-shaped titanium dioxide nano particles, which serve as the anode material, are higher in specific capacity and cycle performance; and the discharging specific capacity under 1C multiplying power is about 150mAh / g, and is not obviously reduced after cycling for 100 times.

Description

technical field [0001] The invention relates to the field of lithium-ion power batteries, in particular to a lithium-ion power battery titanium dioxide nanoparticle negative electrode material and a preparation method thereof. Background technique [0002] With the increasingly prominent energy and environmental issues, clean energy has attracted much attention, which puts forward higher requirements for secondary power supplies. As a high-performance secondary green battery, lithium-ion batteries have been widely used in various portable electronic products and communication tools. At present, graphite anode materials are mainly used commercially, but the safety and cycle life problems of graphite restrict its application in electric vehicles. As an anode material for lithium-ion batteries, titanium dioxide has the advantages of abundant raw material resources, low price, non-toxicity, environmental friendliness, high theoretical capacity, good thermal stability and good c...

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Problems solved by technology

However, what is obtained is an amorphous precursor, and due to the calcination treatment, the particles are agglomerated or sintered to a greater extent, which increases the diffusion distance of lithium ions in the particles, and the conductivity and large-rate output performance of the material have not been substantially improved; water The thermal method is widely used. Using specific reaction conditions, precursors, catalysts, and structure-directing agents, stable nanostructures with different specific shapes can be obtained. However, the hydrothermal method requires high-temperature and high-pressure resistant equipment, and it is difficult to industrialize.

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