Lithium ion battery electrode material preparation method

Abstract

The invention relates to a lithium ion battery electrode material preparation method. The method includes: well mixing anhydrous aluminum chloride and sodium chloride, heating and stirring to obtain a fused salt phase; well mixing a fused ring compound with anhydride according to a molar ratio of 1:1, adding into the fused salt phase, well mixing, and calcining; adding products obtained after calcination into hydrochloric acid solution, stirring for acidolysis for 12-48h, and leaching to obtain a crude product; sequentially subjecting the crude product to reflux with deionized water, ethyl alcohol and methyl benzene for one time, and performing vacuum drying to obtain a lithium ion battery electrode material. The method is simple, feasible, low in cost, green and environmental friendly, and completion in fused salt systems such as NaCl-AlCl3 can be realized; by binary or polybasic copolycondensation, flaws are introduced into the material to reduce intermolecular close packing and enhance electrochemical reaction activity of the electrode material; by doping of heteroatoms, electrical conductivity of the material is effectively improved; high energy density, high specific capacity and excellent rate and cycle performances are realized.

Description

Technical field [0001] The invention relates to a method for preparing a positive electrode of a lithium ion battery, in particular to the design and synthesis of a molecularly regulated conjugated polymer. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, high energy density and power density, long cycle life, wide operating temperature range, no memory effect and good safety performance. They have been widely used in portable electronic products. After recent years of research technology and the expansion of application fields, lithium-ion batteries have begun to advance in a diversified direction, and there is also a huge demand in electric vehicles and energy storage power stations. Traditional inorganic cathode materials, including lithium-containing metal oxides or phosphates, have limited capacity enhancement, poor safety and stability, unfriendly environment, and high cost, which limit their application in large power batteri...

AI Technical Summary

Problems solved by technology

In order to solve this problem and make full use of active materials, it is often necessary to add a large amount of conductive carbon additives through physical mixing during the electrode preparation process, but this greatly reduces the energy density of electrode materials, and it is impossible to design high specific capacity at the molecular level. conductive conjugated carbonyl polymer

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