LITHIUM SECONDARY BATTERY, ITS POSITIVE ELECTRODE ACTIVE SUBSTANCE, AND ITS MANUFACTURING METHOD

PROBLEM TO BE SOLVED: To provide a positive electrode active substance for a lithium secondary battery which uses an iron lithium phosphate material of a low cost and can improve discharge characteristics in a large current and high temperature characteristics and can control a capacity deterioratio...

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Bibliographische Detailangaben
Hauptverfasser:	DOTSUKO KAORU, ABE HIDETOSHI, SUZUKI TOMOMUNE, KANEMURA KIYOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a positive electrode active substance for a lithium secondary battery which uses an iron lithium phosphate material of a low cost and can improve discharge characteristics in a large current and high temperature characteristics and can control a capacity deterioration during storage. SOLUTION: In the manufacturing method of a lithium secondary battery positive electrode active material, olivine type phosphoric acid M lithium (M is a transition metal) obtained in a conventional method or olivine type M lithium compounded with carbon is cleansed by an acid with reducibility or by a solution in which acid is added by a reducing agent. COPYRIGHT: (C)2009,JPO&INPIT