Title:
【発明の名称】リチウム電池用正極活物質、その製造法並にその正極板
Document Type and Number:
Japanese Patent JP2796839
Kind Code:
B2
Abstract:
PURPOSE:To increase the discharge power capacity and to improve the discharge performance by making a hydrated FeVO4 manufactured by a specific method in an amorphous condition by a specific method, and using such a material for a positive electrode active substance. CONSTITUTION:A hydrated FeVO4 is obtained by separating by mixing a water solution including vanadic ions such as verious vanadates and a water solution including iron ions such as various iron (III) conpounds, or by separating by adding ammonia solution after a crystalline FeVO4 is dissolved once in nitric acid. The hydrated FeVO4 is heat-treated in the atmosphere, in a vacuum, or in an inert gas ambiance at the temperature 100 deg.C or more and less than 474 deg.C to make into an amorphous condition. The amorphous FeVO4 is mixed and kneaded with a binder, and pressure-formed to manufacture a positive electrode plate.
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Inventors:
OKAZAKI YOJI
MATSUKI KENZO
SUGAWARA RIKURO
MATSUKI KENZO
SUGAWARA RIKURO
Application Number:
JP14923889A
Publication Date:
September 10, 1998
Filing Date:
June 12, 1989
Export Citation:
Assignee:
FURUKAWA DENCHI KK
International Classes:
H01M4/52; H01M4/08; H01M4/1391; (IPC1-7): H01M4/58; H01M4/04
Attorney, Agent or Firm:
Kazuo Kitamura