Oxide solid solution, preparation method of oxide solid solution, lithium ion battery anode material and preparation method of lithium ion battery anode material

Abstract

The invention relates to oxide solid solution, a preparation method of the oxide solid solution, a lithium ion battery anode material and a preparation method of the lithium ion battery anode material. The oxide anode material is prepared by using the oxide solid solution as precursors. The preparation method of the oxide anode material comprises the steps of adding mixed water solution of nickel salt, cobalt salt and manganese salt into oxalic acid or oxalate water solution to produce nickel, cobalt and manganese oxalate co-precipitated products, separating solid from liquid, washing, drying, calcining in an atmosphere of air and decomposing to obtain the oxide solid solution; and mixing and grinding the solid solution and lithium salt, drying and roasting at high temperature to obtain the oxide anode material. The solid solution is an ideal raw material for preparing the oxide anode material, the process stability and the product consistency are improved and the material performance is improved; and the oxide anode material is a high-voltage and high-capacity anode material. The preparation methods are suitable for the large-scale, economic, stable and reliable production of the solid solution and the oxide anode material.

Description

technical field [0001] [The present invention belongs to the technical field of energy material preparation, and relates to an oxide solid solution and a preparation method thereof, as well as a lithium-ion battery cathode material prepared using the oxide solid solution as a precursor and a preparation method thereof. Background technique [0002] Lithium-ion batteries have been widely used in electronic products such as mobile phones, notebook computers, and digital cameras, and are developing into large-scale power batteries (such as for electric vehicles) and energy storage batteries (such as for solar and wind power generation systems). [0003] The core of lithium-ion batteries is materials, including positive electrode materials, negative electrode materials, separators, electrolytes, etc. At present, the practical positive electrode materials include layered structure oxide positive electrode materials such as lithium cobaltate (LiCoO 2 ), lithium nickel cobalt alu...

AI Technical Summary

Problems solved by technology

[0022] In order to solve the problems of existing hydroxide co-precipitation-high temperature solid phase method and oxalate co-precipitation-high temperature solid phase method, the present invention prepares layered structure oxide positive electrode materials including ternary nickel cobalt lithium manganate and lithium-rich lithium manganate solid solution In view of the disadvantages of positive electrode materials, a novel oxide solid solution and its preparation method and a layered structure oxide positive electrode material for lithium ion batteries and its preparation method are proposed