Lithium ion secondary battery

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United States of America Patent

PATENT NO 9819018
SERIAL NO

15168804

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Abstract

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There is provided a lithium ion secondary battery with a high capacity and having excellent cycle characteristics. The lithium ion secondary battery, including a positive electrode, a negative electrode, a separator and a nonaqueous electrolyte liquid. Here, the positive electrode comprises a positive electrode material in which a surface of particles of a positive electrode active material is coated with an Al-containing oxide. The Al-containing oxide has an average coating thickness of 5 to 50 nm. The positive electrode active material contained in the positive electrode material comprises a lithium cobalt oxide comprising Co and at least one kind of an element M1 selected from the group consisting of Mg, Zr, Ni, Mn, Ti and Al. The negative electrode comprises a material S including SiOx (0.5≦x≦1.5) as a negative electrode active material, wherein in 100 mass % of a total of the negative electrode active material included in the negative electrode, the materials S is included in the negative electrode active material at a content of 10 mass % or more.

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Patent Owner(s)

Patent OwnerAddress
MAXELL LTDJAPAN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Abe, Hiroshi Ibaraki, JP 472 5125
Abe, Toshihiro Ibaraki, JP 41 766
Hashimoto, Yuji Ibaraki, JP 91 989
Inaba, Akira Ibaraki, JP 52 410
Ishizawa, Seiji Ibaraki, JP 5 32
Sekiya, Tomohito Ibaraki, JP 6 13
Yoshikawa, Susumu Ibaraki, JP 28 412

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