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

A cathode material layer, lithium-ion battery technology, applied in electrode manufacturing, battery electrodes, secondary batteries, etc., can solve the problems of long process cycle, long process cycle, prominent energy consumption, etc., to achieve high electrochemical performance, product The effect of stable quality and reduced energy consumption

Inactive Publication Date: 2005-03-30
CHINA NAT OFFSHORE OIL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similarly, two high-temperature calcinations, the process cycle is too long, the energy consumption is very prominent, and the poor cycle characteristics of the layered lithium manganate battery is the problem.
[0006] From the above, it can be seen that the hydrothermal method or calcination method as the background technology has a long process flow cycle, high requirements for reaction conditions, and high energy consumption, and the performance of the layered lithium manganese oxide battery is relatively low. common problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Put lithium hydroxide into 2L of a solution with a concentration of 10% and put it into an autoclave, and at the same time, add manganese oxide, nickel oxide, and cobalt oxide according to Mn:Ni:Co=0.5:0.3:0.2 to adjust the solid-liquid concentration in the autoclave. The ratio is 1:10, and the reaction temperature is 60°C, and the pressure is 0.8Mpa, and the hydrothermal reaction is carried out for 8 hours. After the reaction, the material is poured out, filtered, beaten, washed, and the filter cake is dried. Calcined at a high temperature in a muffle furnace for 10 hours to obtain sample A.

Embodiment 2

[0015] Put lithium hydroxide into 2L of a solution with a concentration of 5% and put it into an autoclave, and at the same time, add manganese oxide, nickel oxide, and cobalt oxide according to Mn:Ni:Co=0.5:0.3:0.2 to adjust the solid-liquid concentration in the autoclave. The ratio is 1:10, and the reaction temperature is 70°C, and the pressure is 0.5Mpa kg, and the hydrothermal reaction is carried out for 6 hours. After the reaction, the material is poured out, filtered, beaten, washed, and the filter cake is dried. Calcined in a muffle furnace for 5 hours to obtain sample B.

Embodiment 3

[0017] Put lithium hydroxide into 2L of a solution with a concentration of 3% and put it into an autoclave, and at the same time, add manganese oxide, nickel oxide, and chromium oxide according to Mn:Ni:Cr=0.5:0.3:0.2 to adjust the solid-liquid concentration in the autoclave. The ratio is 1:10, and the reaction temperature is 80°C, and the pressure is 0.3Mpa kg, and the hydrothermal reaction is carried out for 10 hours. After the reaction, the material is poured out, filtered, beaten, washed, and the filter cake is dried. Calcined in a muffle furnace for 5 hours to obtain sample C.

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/00C01G1/02C01G45/00H01M4/04H01M4/48H01M4/50H01M4/52H01M4/58H01M10/36
CPCY02E60/122H01M4/485H01M4/525H01M10/0525H01M4/505Y02E60/10
Inventor 刘锦平孙新华赵庆云宋晓丽
Owner CHINA NAT OFFSHORE OIL CORP
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