A kind of preparation method of double metal oxide composite negative electrode material with multi-level structure

Abstract

The invention discloses a method for preparing a double metal oxide negative electrode composite material with a multi-stage structure, and belongs to the technical field of lithium ion batteries. Themethod includes the following specific steps of dissolving nickel nitrate, cobalt nitrate, ammonium salt and amide into water, stirring, moving into a polytetrafluoroethylene reactor and adding appropriate amount of foam metal, reacting for 10-15 hours, cooling and drying, and then transferring to a tube furnace and carrying out heat treatment in an N2 atmosphere for 1-5 hours to obtain NiCoO2-Co3O4 grown on the foam metal, placing the NiCoO2-Co3O4 in a small beaker, adding an aqueous solution of a surfactant, ultrasonic processing, stirring, successively adding pyrrole, an acid solution andan oxidizing agent, washing after stirring in an ice water bath and drying to obtain a target product. The Co and Ni double metal oxide negative electrode composite material prepared by the method hasa uniform particle size, a stable and compact structure, considerable wide potential window reversible capacity, excellent rate performance and stable cycle life.

Description

technical field

[0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a double metal oxide negative electrode material for lithium ion batteries, in particular to a preparation method for a double metal oxide composite negative electrode material with a multi-level structure. Background technique

[0002] Traditional fossil energy is facing the crisis of shortage or even depletion, and it has brought huge pressure to environmental protection. The new industrialization development direction of circular economy and low-carbon economy will promote the rapid development of new energy automobile industry. As a new generation of environmentally friendly and high-energy batteries, lithium-ion power batteries have become the mainstream product of power batteries for new energy vehicles. However, since the commercialization of lithium-ion batteries in the 1990s, positive electrode materials have been continuously introduced, while ...

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