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Preparation method of co, mn coated high-nickel layered lini0.92co0.04mn0.04o2 lithium battery cathode material

A positive electrode material and lithium battery technology, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of poor battery cycle performance, poor lattice stability, and difficulty in meeting the requirements of high capacity and high cycle performance, etc., to achieve Effects of improving battery cycle performance, low cost, and improving lattice stability

Inactive Publication Date: 2016-01-13
宁夏科捷锂电池股份有限公司
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Problems solved by technology

[0002] Ternary materials have been widely used as positive electrode materials for lithium batteries, but the existing high-nickel ternary positive electrode materials have the disadvantages of poor material lattice stability and poor battery cycle performance, making it difficult to use both high capacity and high cycle performance Require

Method used

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  • Preparation method of co, mn coated high-nickel layered lini0.92co0.04mn0.04o2 lithium battery cathode material

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Embodiment Construction

[0013] The method of the embodiment of the present invention comprises the following steps:

[0014] 1) Add a certain amount of distilled water and spherical Ni(OH) into the reactor 2 ;

[0015] 2) Stir at 500r / min under constant temperature conditions of 50°C, and add Co(NO 3 ) 2 and Mn(NO 3 ) 2 mixture;

[0016] 3) Add the mixed solution of ammonia water and NaOH, adjust the pH of the solution in the reaction kettle, keep the pH at 8-10, and make Co and Mn evenly precipitate into Ni(OH) 2 surface;

[0017] 4) after aging, washing and drying to obtain a precursor;

[0018] 5) Combine the precursor prepared above with LiOH·H 2 O is mixed evenly according to the molar ratio of 1:1.03;

[0019] 6) The mixed powder is sintered in a kiln. The temperature system is: 500°C for 5h, and then 700°C for 12h; the heating and cooling rates are both 2°C / min, and LiNi is obtained. 0.92 co 0.04 mn 0.04 o 2 Cathode material.

[0020] Detect and test the material obtained in the ...

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Abstract

The invention relates to the preparation method of a lithium battery cathode material, and particularly relates to a preparation method of a Co and Mn coated high-nickel layered LiNi0.92Co0.04Mn0.04O2 lithium battery cathode material. The method comprises the following steps: 1) adding certain distilled water and spherical Ni(OH)2 into a reaction kettle; 2) adding a Co(NO3)2 and Mn(NO3)2 mixed solution with the required stoichiometric ratio of Co to Mn; 3) adding a mixed solution of ammonium hydroxide and NaOH, and adjusting the pH to be 8-10; 4) washing and drying after aging, thereby obtaining a precursor; 5) mixing the precursor and LiOH.H2O uniformly; and 6) sintering in a kiln, thereby preparing the cathode material LiNi0.92Co0.04Mn0.04O2. According to the preparation method disclosed by the invention, the surface of the ternary cathode material is coated, and the lattice stability of the material surface can be improved, thus the battery cyclicity of the ternary cathode material under the condition of high nickel is improved.

Description

technical field [0001] The invention relates to the manufacture of positive electrode materials for lithium batteries, specifically a Co, Mn-coated high-nickel layered LiNi 0.92 co 0.04 mn 0.04 o 2 A method for preparing a positive electrode material for a lithium battery. Background technique [0002] Ternary materials have been widely used as positive electrode materials for lithium batteries, but the existing high-nickel ternary positive electrode materials have the disadvantages of poor material lattice stability and poor battery cycle performance, making it difficult to use both high capacity and high cycle performance Require. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a Co, Mn coated high-nickel layered LiNi battery with good cycle performance. 0.92 co 0.04 mn 0.04 o 2 A method for preparing a positive electrode material for a lithium battery. [0004] Co, Mn-coated high-nickel layered LiNi o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/38H01M4/1391
CPCH01M4/505H01M4/525H01M4/62Y02E60/10
Inventor 杨克涛王辉黄婷
Owner 宁夏科捷锂电池股份有限公司
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