Negative electrode active material, mixed negative electrode active material, negative electrode for nonaqueous electrolyte secondary battery, lithium ion secondary battery, and method for producing negative electrode active material

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United States of America

PATENT NO 11316147
APP PUB NO 20210193990A1
SERIAL NO

16074286

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Abstract

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A negative electrode active material includes: particles of negative electrode active material, the particles of negative electrode active material contain particles of silicon compound containing a silicon compound (SiOx:0.5≤x≤1.6); the particles of silicon compound contain at least one kind or more of Li2SiO3 and Li4SiO4; the particles of negative electrode active material contain Li2CO3 and LiOH on a surface thereof; and a content of the Li2CO3 is 0.01% by mass or more and 5.00% by mass or less relative to a mass of the particles of negative electrode active material and a content of the LiOH is 0.01% by mass or more and 5.00% by mass or less relative to the mass of the particles of negative electrode active material. Thus a negative electrode active material is capable of improving initial charge/discharge characteristics and the cycle characteristics when used as a negative electrode active material of the secondary battery.

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Patent Owner(s)

Patent OwnerAddress
SHIN-ETSU CHEMICAL CO LTDJAPAN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Awano, Hidekazu Takasaki, JP 20 140
Furuya, Masahiro Takasaki, JP 62 716
Hirose, Takakazu Annaka, JP 143 1090
Kamo, Hiromichi Takasaki, JP 61 257
Matsuno, Takumi Annaka, JP 39 80

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