Organic anode material and preparation method and application thereof

Abstract

The invention discloses an organic anode material and a preparation method and an application thereof. The organic anode material is a composite material of perylene diimide and conductive carbon black and can be used as a lithium/sodium ion battery anode material. The organic anode electrode material compounded by perylene diimide and conductive carbon is prepared by means of an acid liquid method. Compared with existing modification methods such as a polymerization method and a ball milling process, the preparation method is simple in process and relatively low in cost. Meanwhile, the organic anode electrode material treated by the acid liquid method is in more compactly contact with a conducting agent, so that the conductivity of organic molecules is improved effectively and meanwhile,the phenomenon that organic molecules are dissolved in an electrolyte in charge and discharge processes is avoided. Compared with existing modification methods, the organic anode electrode material compounded by perylene diimide and conductive carbon can be applied to lithium ion electrode and sodium ion battery at the same time, and the rate performance and the cycle stability thereof are higherthan those of existing modification methods.

Description

technical field [0001] The invention relates to an electrode material and a preparation method thereof, in particular to an electrode material used in a lithium / sodium ion battery and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of mobile electronic devices and electric vehicles, there is a great demand for lithium-ion batteries in terms of yield and energy density. In order to improve the performance of lithium-ion batteries, many studies on new lithium-ion battery electrode materials have been carried out, and their research is dedicated to improving the capacity and cycle life of lithium-ion batteries. In today's commercial lithium-ion batteries, the cathode materials are mainly inorganic compounds, such as lithium cobalt oxide, lithium manganese oxide, and lithium iron phosphate. Their low theoretical capacity and limited mineral resources limit their performance in lithium-ion batteries. Improvement and cost re...

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Problems solved by technology

[0005] In view of the above-mentioned defects of the prior art, the present invention aims to solve the problem of mixing organic molecules that are difficult to dissolve in traditional solvents and conductive agents through the acid solution method, so that it can be fully mixed with the conductive agent to solve the problem of its dissolution and conductivity in the electrolyte. To solve the problem of poor performance, improve the capacity and cycle stability of the battery, prepare a composite material of organic positive electrode material and conductive agent by acid solution method, in which the ratio of organic positive electrode material and conductive agent can be adjusted arbitrarily, and can improve battery capacity and cycle stability

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