Strontium titanate modified nickel cobalt lithium manganate positive electrode material and lithium ion battery containing same

Abstract

The invention belongs to the field of preparation of lithium ion battery materials, and particularly relates to a preparation method of a strontium titanate modified nickel cobalt lithium manganate positive electrode material, the prepared positive electrode material and a lithium ion battery containing the positive electrode material. The positive electrode material is a rare earth element doped strontium titanate modified nickel cobalt lithium manganate positive electrode material doped with large and small particles. The preparation method has the advantages that rare earth element doped strontium titanate modification and large and small particle mixing are adopted, requirements on a precursor is not high, the prepared precursor is wide in particle size distribution, a large and small particle mixed ternary material can be formed in a later period, ammonia water does not need to serve as a complexing agent in the preparation method, harm of ammonia water serving as a complexing agent to the safety and health of workers is avoided, and the treatment cost of wastewater is reduced.

Description

technical field [0001] The invention belongs to the field of preparation of lithium-ion battery materials, in particular to a nickel-cobalt-lithium-manganese-oxide cathode material and a lithium-ion battery containing it. Background technique [0002] In order to gradually solve the three major problems of energy shortage, greenhouse gas and air pollution that restrict the current economic development, lithium-ion batteries, as an energy storage device, have high working voltage, high energy density, long cycle life and low self-discharge rate. , No memory effect, no environmental pollution and other advantages. In the past ten years, it has achieved rapid development in technology, production and market, and has formed a large emerging industry, which has attracted more and more attention from all aspects. The improvement of cruising range, fast charging technology and safety performance of new energy electric vehicles requires lithium-ion batteries equipped with electric ...

AI Technical Summary

Problems solved by technology

However, reducing the particle size will cause serious agglomeration during the electrochemical cycle, and the large specific surface area brought about by reducing the particle size requires the addition of more binders, which increases the expansion of the binder at high temperatures. Lead to the destruction of the electron conduction path, thereby deteriorating its cycle performance at high temperature

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