METHOD FOR PRODUCING ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

Title:

METHOD FOR PRODUCING ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

Document Type and Number:

Japanese Patent JP2012204322

Kind Code:

A

Abstract:

To provide a method for producing active material particles having little impurity for a nonaqueous electrolyte secondary battery comprising a compound of alkali metal-iron-fluorophosphate by using a simple solid phase method with high reproducibility.

A method of producing active material particles composed of a compound represented by a general formula: A_xM¹_yM²_1-yPO₄F (In the formula, A is one or two or more of elements selected from Li, Na and K where Na is indispensable and 1≤x≤2, M¹ is one or two or more of elements selected from Fe and Co where 0.9≤y≤1, and M² is one or two or more of elements selected from Mn, Ni, Mg, Al, Ti, V and Zn) includes: a step for mixing raw material powders as a source of A, M¹, M², PO₄ and F; a temporary calcination step for heat treating the mixed raw material powders in a non-oxidizing gas; and a proper calcination step for heat treating the obtained temporary calcined matter in the non-oxidizing gas while being surrounded by a metal material.

Inventors:

KAWABE YOSHITERU
INAMASU TOKUO
KOMABA SHINICHI
YABUUCHI NAOAKI

Application Number:

JP2011070901A

Publication Date:

October 22, 2012

Filing Date:

March 28, 2011

Export Citation:

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Assignee:

GS YUASA CORP

International Classes:

H01M4/58; C01B25/455; H01M4/36

Domestic Patent References:

JP2006516172A	2006-06-22
JP2004514639A	2004-05-20
JP2009263222A	2009-11-12

Foreign References:

WO2010149681A1	2010-12-29
WO2010150889A1	2010-12-29

Attorney, Agent or Firm:

Masashi Moriwaki
Tetsuro Kawahara

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