Nonaqueous electrolyte secondary battery

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United States of America Patent

PATENT NO 9876222
SERIAL NO

14435294

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Abstract

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A nonaqueous electrolyte secondary battery which can suppress the change in structure of a positive electrode active material at a high voltage is provided. The nonaqueous electrolyte secondary battery has a positive electrode including a positive electrode active material which absorbs and releases lithium ions; a negative electrode including a negative electrode active material which absorbs and releases lithium ions; and a nonaqueous electrolyte. The positive electrode active material has a surface to which a rare earth compound is adhered and includes a lithium cobalt composite oxide containing at least one type selected from the group consisting of Ni, Mn, Ca, Cu, Zn, Sr, Ge, Sn, Si, P, Nb, Mo, S, and W, and charge is performed so that the potential of the positive electrode is 4.53 V or more with reference to lithium.

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Patent Owner(s)

Patent OwnerAddress
PANASONIC ENERGY CO LTD1-1 MATSUSHITA-CHO MORIGUCHI-SHI OSAKA 570-8511

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fukui, Atsushi Daito, JP 273 2424
Hasegawa, Kazuhiro Daito, JP 144 1814
Takanashi, Yuu Daito, JP 11 25
Tsuruta, Sho Daito, JP 24 65

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