POSITIVE ELECTRODE FOR SECONDARY BATTERIES, METHOD FOR PRODUCING SAME, AND SECONDARY BATTERY

POSITIVE ELECTRODE FOR SECONDARY BATTERIES, METHOD FOR PRODUCING SAME, AND SECONDARY BATTERY

A positive electrode for a secondary battery including a positive electrode current collector, and a positive electrode active material layer supported on the positive electrode current collector. The positive electrode active material layer includes active material particles and an oxide film cover...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: NISHIMORI Yuta, NISHINO Hajime, SASAKI Takashi, SATOU Yoshinori, HARADA Maho, NAKAYAMA Takahito
Format: Patent
Sprache:eng ; fre ; ger
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:A positive electrode for a secondary battery including a positive electrode current collector, and a positive electrode active material layer supported on the positive electrode current collector. The positive electrode active material layer includes active material particles and an oxide film covering at least part of surfaces of the active material particles. The active material particles include a lithium-containing transition metal oxide, and the oxide film contains an oxide of a first element other than nonmetal elements. When a thickness of the positive electrode active material layer is denoted by TA, Tb > Tt is satisfied, where the Tb and the Tt are thicknesses of the oxide film at a position of 0.25TA and at a position of 0.75TA, respectively, from a surface of the positive electrode current collector in the positive electrode active material layer.