Preparation method for carbon-based lithium ion battery electrode material

Abstract

The invention discloses a preparation method for a carbon-based lithium ion battery electrode material, relates to the technical field of an electric material, and aims to solve the technical problem that the existing material is low in specific capacity. The preparation method comprises the steps of putting polyacrylonitrile and transition metal nitrate into dimethylformamide solvent based on the mass ratio of 1:1 to obtain a precursor solution; performing electrospinning on the precursor solution by an electrostatic spinning apparatus to obtain protofilament; and performing pre-oxidation, stabilization and carbonization treatment on the protofilament in sequence to obtain the carbon-based lithium ion battery electrode material. The preparation method provided by the invention is simple in method, and low in preparation cost.

Description

technical field [0001] The invention relates to electrical material technology, in particular to a technology for preparing a carbon-based lithium ion electrode material. Background technique [0002] In order to adapt to the development of consumer electronics, electric vehicles, and energy storage, lithium-ion batteries with higher energy density, power density, cycle times, and safety need to be developed. Among them, the development of high-capacity, high-rate performance and cycle-stable electrode materials is the key, and it is also a research hotspot and difficulty. At present, lithium-ion batteries are widely used in mobile phones and notebook computers. Lithium-ion batteries have become the main energy storage devices on the market due to their high voltage, high energy density and low self-discharge rate. As an important part of lithium-ion batteries, negative electrode materials directly restrict the electrochemical performance of lithium-ion batteries. Ideal neg...

AI Technical Summary

Problems solved by technology

They found that the carbon fiber prepared by carbonization at around 700°C has a high capacity as the negative electrode material of lithium battery. Although the carbon material has good cycle performance as the negative electrode, the specific capacity of the carbon material is low. The specific capacity of carbon fiber used as an electrode material for lithium-ion batteries is generally about 400mAh / g, which is higher than the 372mAh / g of the current commercialized graphite, but it is also difficult to meet the needs of high-power batteries for electric vehicles.

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