Method for compositely coating lithium battery positive electrode material with tungsten oxide and nitrogen-doped carbon

A battery cathode, nitrogen-doped carbon technology, applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of inability to improve the conductivity of cathode materials, unfavorable industrial production and manufacturing, and achieve excellent electronic conductivity and electrochemical performance. Effects of improved stability, electronic conductivity and electrochemical stability, low energy consumption
CN111900401AActive Publication Date: 2020-11-06GUIZHOU MEILING POWER SUPPLY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GUIZHOU MEILING POWER SUPPLY CO LTD
Publication Date
2020-11-06

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Abstract

The invention belongs to the technical field of manufacturing of lithium battery cathode materials, and specifically relates to a method for compositely coating a lithium battery cathode material withtungsten oxide and nitrogen-doped carbon. A coating layer is formed on the surface of the lithium battery positive electrode material by polymerization of a carbon precursor and precipitation of a tungsten precursor. Curing and bonding of coating layer are realized through a calcining process. According to the present invention, the method has characteristics of low cost, low energy consumption and simple operation, and the lithium battery positive electrode material prepared through the method has characteristics of excellent electronic conductivity and excellent electrochemical stability.
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Description

technical field

[0001] The invention belongs to the technical field of lithium battery anode material production, and in particular relates to a method for composite coating lithium battery anode materials with tungsten oxide and nitrogen-doped carbon. Background technique

[0002] Lithium iron phosphate is one of the most widely used lithium battery electrode materials. This is mainly due to the good cycle stability brought about by the olivine crystal structure of lithium iron phosphate. On the other hand, lithium iron phosphate does not contain expensive and environmentally polluting components such as cobalt, so it has obvious advantages in material preparation and waste treatment (Chem. Eng. J. 2020, 379, 122371). However, lithium iron phosphate also has many inherent problems, which mainly include the weak electronic conductivity of lithium iron phosphate and the poor rate performance of lithium iron phosphate caused by the slow lithium ion transport performance (Ener...

Claims

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