Preparation method, product and application of titanium dioxide nano-film and ferroferric oxide nano-particle-loaded carbon fibre material

Abstract

The invention discloses a preparation method of a titanium dioxide nano-film and ferroferric oxide nano-particle-loaded carbon fibre material. The method comprises the following steps: with tetrabutyl titanate as a precursor and natural cellulose as a template, depositing a titanium dioxide nano-film on the surface of the template by a surface sol-gel method; soaking the titanium dioxide nano-film in a ferric trichloride water solution; and finally drying and calcining the titanium dioxide nano-film to obtain the titanium dioxide nano-film and ferroferric oxide nano-particle-loaded carbon fibre material. According to the preparation method, the natural cellulose is adopted as the raw material and simultaneously is taken as the template and a carbon source; the titanium dioxide nano-film and the ferroferric oxide nano-particles are compounded through a simple process; and the prepared composite material, as an anode material of a lithium ion battery, has the advantages of high specific capacity, excellent cycling stability, long cycle life and stable specific discharge capacity at high rate.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a preparation method, product and application of a carbon fiber material loaded with titanium dioxide nano film and ferric oxide nano particles. Background technique [0002] With the vigorous development of modern science and technology, various electronic devices and electric vehicles have been widely used, and the requirements for chemical power sources are also getting higher and higher. Due to its long service life, high energy density and low environmental pollution, the rechargeable lithium-ion battery has become a powerful power resource in various industries. At present, the market demand for high-energy lithium-ion electrode materials has attracted the attention of many researchers. Therefore, they are urgently looking for anode materials with superior electrochemical performance and large-scale realization of lithium-ion batteries with high storage capacity and cu...

AI Technical Summary

Problems solved by technology

But its disadvantage is that its operating voltage of lithium intercalation and delithiation is usually lower than 0.2V, which will also bring a series of safety problems; lower theoretical specific capacity (372mAh / g) and in the process of SEI film formation The severe charge loss limits the practical application

[0005] However, in the above-mentioned disclosed documents, there are many types of raw materials required for the synthetic materials, the synthesis steps are complicated, and the production cost is high.

Moreover, the synthesized materials are prone to volume expansion and agglomeration during charge and discharge, which makes the lithium storage capacity drop sharply, which is not conducive to commercialization.

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