Method of prepn, of positive electrode laminated cell lithium manganate of lithium ion

Abstract

Characters are that combined hydrothermal method and calcinations method is adopted in the invention. Technical steps are: adding manganese salt including doped Co, Cr, Ni elements and aqueous solution of lithium salt according to solid to liquid ratio 1:10 into reaction kettle; hydrothermal reaction is carried out under certain temp, pressure and time; after reaction, reaction liquid in the kettle passes through cooling, filtering, washing and drying procedures; then calcinations in high temp is carried out in baking furnace so as to obtain product of laminar lithium manganate.

Description

technical field

[0001] The invention belongs to the technical field of lithium ion battery cathode material preparation. Background technique

[0002] Cathode materials are an important part of lithium-ion batteries. Compared with lithium cobalt oxide, a new type of cathode material, lithium manganese oxide has the advantages of easy availability of raw materials and low price, and is considered to be the most promising cathode material. There are two crystal forms of lithium manganate: spinel and layered crystals. The products of both crystal forms have the disadvantage that the battery capacity decreases after repeated charge and discharge cycles, but because the initial capacity of layered lithium manganese oxide is twice that of spinel lithium manganate, so the layered lithium manganate is currently more Lithium manganese oxide is the focus of development.

[0003] The preparation of layered lithium manganate abroad mainly adopts the following two methods:

[0004] 1...