Method for preparing anode material vanadium lithium fluorinated phosphate of lithium ion secondary battery

A technology of lithium fluoride vanadium phosphate and secondary batteries, which is applied in battery electrodes, chemical instruments and methods, circuits, etc., can solve the problems of high cost of synthetic products, cumbersome operation, long reaction time, etc., and achieve low production cost and excellent process Simple, valence-reducing effect
CN1803593AInactive Publication Date: 2006-07-19NANKAI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANKAI UNIV
Publication Date
2006-07-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a preparaiton method for vanadic lithium fluoride phosphate as anode material of lithium cell. Wherein, with low-temperature solid phase reaction, mixing the hydrogen peroxides solution and vanadic oxide to obtain hydrogel; using the ydrogel, ammonium monoacid phosphate, lithium fluoride and acetylene black to compose the predecessor of LiVPO4F; baking the predecessor at inertia gas to reduce V5+ into V3+ completely and obtain the LiVPO4F. This invention simplifies operation, reduces reaction temperature and time and cost. The product has well performance and application future.
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Description

technical field

[0001] The invention relates to a lithium ion secondary battery cathode material lithium vanadium phosphate fluoride (LiVPO 4 F) Preparation method. It is synthesized by a low-temperature solid-state method, and the lithium-ion battery cathode material LiVPO synthesized by this method 4 F, has a higher discharge voltage, can be used as a cathode material for lithium-ion batteries above 4V, and has good electrochemical performance, high charge-discharge capacity and good cycle stability. Background technique

[0002] In recent years, due to the relatively high energy density and long cycle life of lithium-ion secondary batteries, they are widely used in various portable electronic products and communication tools, and they also have huge applications in electric vehicles and energy storage equipment. prospect. The performance of lithium-ion batteries depends largely on the cathode material. At present, lithium cobalt oxide has been used in commercial lithi...

Claims

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