Method for preparing metal Ni, Cu, coated LiFePo4 powder

A powder and coating technology, applied in the field of material science, can solve the problems of low electronic conductivity, low manufacturing cost, low synthesis temperature, etc., and achieve the effect of high material yield, low production cost and low firing temperature
CN1649188AInactive Publication Date: 2005-08-03TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2005-08-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

A preparing method for LiFePO4 powder covered by Ni and Cu includes preparing LiFePO4 powder with uniform diameters, preparing a chemical coating liquid C with Cu, putting powder A in SnCl2 water solution, mixing, filtering and washing, after that, the filtered cake is put into PdCl solution, mixing, filtering and washing to put the solid one into the coating solution B and C to be coated, filtered and washed, the power is processed in inert or recovered atmosphere to get the black LiFePO4 powder covered by the metal.
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Description

technical field

[0001] The invention relates to a common secondary lithium ion battery or power energy battery positive electrode material LiFePO 4 The invention relates to a process method for surface modification of powder with metal Ni and Cu, which belongs to the field of material science. Background technique

[0002] LiFePO 4 The material has the characteristics of cheap, non-toxic, non-hygroscopic, good environmental compatibility, rich mineral resources, high capacity (theoretical capacity is 170mAh / g, energy density is 550Wh / Kg), and good stability. It is one of the most potential alternative materials for cathode materials. Due to its poor electronic conductivity, it greatly limits the application of materials at higher current densities. Currently, there are mainly two methods for surface modification of materials:

[0003] 1) Carbon black coating; Huang, H., S.C.Yin, and L.F.Nazar, Approaching theoretical capacity of LiFePO4 at room temperature at high rates. ...

Claims

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