Manufacturing method for La-doped Ti-coated ternary cathode material

A cathode material and coating technology, which is applied in the field of preparation of La-doped Ti-coated ternary cathode materials, can solve the problems of poor rate performance and cycle performance, and achieve the effect of low cost, rate performance and cycle performance improvement

Inactive Publication Date: 2015-06-24
宁夏科捷锂电池股份有限公司
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Problems solved by technology

However, the existing ternary cathode materials have the defects of poor rate performance and cycle performance.

Method used

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  • Manufacturing method for La-doped Ti-coated ternary cathode material

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Embodiment Construction

[0013] The steps of the embodiment of the present invention are as follows:

[0014] 1) The ternary precursor (Ni 0.45 co 0.2 Mn0 .35 )(OH) 2 ;

[0015] 2) The ternary precursor (Ni 0.45 co 0.2 mn 0.35 )(OH) 2 , battery grade lithium carbonate, mixed and sintered according to the molar ratio of 1:1.04 to obtain the ternary cathode material Li(Ni 0.45 co 0.2 mn 0.35 )O 2

[0016] 3) Sinter the mixed raw materials in an air atmosphere muffle furnace, first pre-sinter at 620°C for 6 hours; then sinter at 900°C for 12 hours; cool naturally with the furnace, take it out; crush it and pass it through a 200-mesh screen ;

[0017] 4) Li(Ni 0.45 co 0.2 mn 0.35 )O 2 and La 2 o 3 Mix in a three-dimensional mixing tank for 4 hours, ball:material=1.5:1, wherein the mass of La accounts for 0.03% of the total mass of the mixed material.

[0018] 5) Place the mixed material in an air atmosphere muffle furnace for secondary sintering, raise the temperature to 900°C at a rat...

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Abstract

The invention relates to a manufacturing method for a lithium ion battery cathode material, in particular to a manufacturing method for a La-doped Ti-coated ternary cathode material. The manufacturing method comprises the following steps: (1), preparing a ternary precursor; (2), preparing a ternary cathode material; (3), mixing the ternary cathode material and La2O3; (4), secondary sintering a mixed material; (5), adding alcohol to a material obtained in the step (4) to disperse; (6), adding titanium isopropylate to absolute ethyl alcohol to completely dissolve the titanium isopropylate, and adding the mixture in the mixed solution obtained in the step (5), uniformly mixing, performing extraction filtration and drying; (7), sintering dried raw materials; crushing the sintered raw materials to obtain the final-products. The manufacturing method for the lithium ion battery cathode material has the advantages that due to La doping and Ti coating, the rate capability and the cycle performance of the ternary cathode material are remarkably improved, and a low-cost and high-performance lithium ion battery cathode material can be obtained.

Description

technical field [0001] The invention relates to a method for manufacturing a positive electrode material of a lithium ion battery, in particular to a method for preparing a La-doped Ti-coated ternary positive electrode material. Background technique [0002] Ternary cathode material Li(Ni 0.45 co 0.2 mn 0.35 )O 2 As a cathode material for lithium-ion batteries, it has the characteristics of low price, high discharge specific capacity, and stable cycle. However, the existing ternary cathode materials have the defects of poor rate performance and cycle performance. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a preparation method of a La-doped Ti-coated ternary cathode material capable of improving the rate performance and cycle performance of the ternary cathode material. [0004] The preparation method of the La-doped Ti-coated ternary positive electrode material of the present invention comprises the fol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525H01M4/36H01M10/0525
CPCH01M4/131H01M4/1391H01M4/366H01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 黄婷
Owner 宁夏科捷锂电池股份有限公司
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