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Lithium ion battery ternary cathode material modified by nanometer SnO2 and preparation method of lithium ion battery ternary cathode material

A technology for lithium-ion batteries and positive electrode materials, applied in the field of nano-SnO2 modified lithium-ion battery ternary positive electrode materials and its preparation, can solve problems such as undiscovered ternary positive electrode materials, avoid agglomeration growth, improve repeatability and consistency , the effect of high capacity

Inactive Publication Date: 2013-12-11
FUZHOU UNIV
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Problems solved by technology

Nano-SnO has not yet been found 2 Literature and patents on modified ternary cathode materials for lithium-ion batteries

Method used

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  • Lithium ion battery ternary cathode material modified by nanometer SnO2 and preparation method of lithium ion battery ternary cathode material
  • Lithium ion battery ternary cathode material modified by nanometer SnO2 and preparation method of lithium ion battery ternary cathode material
  • Lithium ion battery ternary cathode material modified by nanometer SnO2 and preparation method of lithium ion battery ternary cathode material

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Embodiment 1

[0030] LiNi produced by 3M Company 1 / 3 co 1 / 3 mn 1 / 3 o 2 As the modified body, it is used as the product design.

[0031] Preparation: mix HCl and deionized water by volume V HCl :V H2O =1:4 configured as an aqueous solution; 15wt% ammonia aqueous solution.

[0032] Preparation Process:

[0033] First, boil the purchased nano-carbon in 0.2 mol / L aqueous nitric acid solution for 30 minutes, filter and wash, then boil the washed nano-carbon in 0.1 mol / L sodium hydroxide aqueous solution for 30 minutes, then filter and wash, at 80°C drying. After drying in N 2 In atmosphere, activate at 500°C for 30min.

[0034] At 20°C, take 100ml of deionized water, adjust the pH to 2.2 with 1:4 hydrochloric acid, add 4.2072g of SnCl 4 ·6H 2 O was stirred and dissolved, and after the solution was clarified, 6ml of 15wt% aqueous ammonia solution was added dropwise, and after stirring for 2h, 6ml of 15wt% aqueous ammonia solution was added dropwise. Stirring was continued for 14 hours...

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Abstract

The invention discloses a lithium ion battery ternary cathode material modified by nanometer SnO2 and a preparation method of the lithium ion battery ternary cathode material. The chemical formula of the ternary cathode material is LiaNixCoyMnzO2, wherein a is not less than 0.9 and not greater than 1.2, and (x+y+z) is equal to 1; the particle dimension of the nanometer SiO2 is 5nm-100nm; the mass ratio of the nanometer SnO2 to the ternary cathode material is 0.01-0.08; nanocarbon is selected as a carrier for separately carrying out a particle growth process and a modification process of the nanometer SnO2. The preparation method disclosed by the invention can be used for precisely controlling the content of a modifier, and improving the material repeatability and consistence; moreover, the prepared lithium ion battery ternary cathode material modified by nanometer SnO2 has higher capacity, rate performance and cycle performance.

Description

technical field [0001] The invention belongs to the field of preparation of energy storage materials, in particular to a nano SnO 2 Modified lithium ion battery ternary positive electrode material and preparation method thereof. Background technique [0002] Lithium cobalt oxide, as the first batch of lithium-ion battery cathode materials on the market, has excellent properties such as simple preparation process, stable material structure, high energy density, good cycle performance, high and stable discharge platform, and has become the most mature cathode material at present. However, lithium cobalt oxide has poor thermal stability and potential safety hazards; in addition, cobalt is poisonous and resource-poor, and the market demand for lithium-ion batteries is gradually increasing, causing the price of cobalt to rise sharply, which restricts the development of the industry and the development of lithium-ion batteries. Applications. For this reason, other positive elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/1391B82Y30/00
CPCY02E60/10
Inventor 刘慧勇罗智妹孙艳光
Owner FUZHOU UNIV
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