Lithium ion battery positive electrode material

Abstract

The invention relates to a lithium ion battery positive electrode material. The preparation method comprises: preparing a nickel lithium manganese positive electrode material precursor by using a sol-gel liquid-phase synthesis method, then preparing an indium compound product through a liquid-phase synthesis method, mixing the nickel lithium manganese positive electrode material precursor and theindium compound product, and carrying out self-propagating combustion solid-phase synthesis to obtain a final product indium-doped nickel lithium manganese positive electrode material. According to the invention, an indium-doped nickel lithium manganese positive electrode material precursor is prepared by adopting a sol-gel method to achieve atomic-scale uniform mixing of reactants and low synthesis temperature, so that the particle size of the prepared product is as small as nanoscale, the uniformity is good, the specific surface area is large, and the form and composition are easy to control; a self-propagating combustion method is adopted, and a target product indium-doped nickel lithium manganese positive electrode material is generated through rapid sintering; and from the perspectiveof the whole process, the method is simple, easy to operate, low in energy consumption, low in cost, easy to realize industrial production, high in production efficiency, high in product specific capacity and long in cycle life.

Description

technical field [0001] The invention relates to lithium ion battery material technology, in particular to a lithium ion battery cathode material. Background technique [0002] The shortage of petrochemical energy and environmental pollution problems (especially the smog in my country's megacities) make the development of electric vehicles one of the emerging strategic industries that the country must develop. With the mass production of electric vehicles, the demand for batteries and energy storage systems with high safety and high energy power density is becoming more and more urgent. Lithium-ion batteries are the best choice, while high safety, high specific capacity, Cathode materials with high specific power and long life are the key issues to be solved urgently for high-performance batteries, which are related to the promotion and application of electric vehicles. [0003] The existing lithium-ion battery cathode materials have defects such as low specific capacity, th...

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a lithium-ion battery positive electrode material with simple process and low cost, aiming to solve the problem that it is easy to repeat after filling the potholes on the road surface