Method of producing active material for lithium secondary...

Details Method of producing active material for lithium secondary... Method of producing active material for lithium secondary...

H - Electricity

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M

H01M 4/36 (2006.01) C01B 25/26 (2006.01) C01B 25/30 (2006.01) C01B 25/37 (2006.01) C01D 15/00 (2006.01) H01M 10/38 (2006.01) H01M 10/36 (2006.01)

Patent

CA 2622675

A method of producing an active material for a lithium secondary battery, by which impurities causing problems in synthesizing an active material for a lithium secondary battery, including a lithium transition metal oxyanion compound are removed efficiently and enhancement of an energy density is realized, is provided. By cleaning the active material for a lithium secondary battery, including a lithium transition metal oxyanion compound, with a pH buffer solution, for example, it is possible to efficiently remove just only impurities such as Li3PO4 or Li2CO3, or a substance, other than LiFePO4, in which the valence of Fe is bivalent such as FeSO4, FeO or Fe3(PO4)2 without dissolving Fe of LiFePO4.

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