Negative electrode active material, negative electrode, and battery

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United States of America

PATENT NO 12199277
APP PUB NO 20220085362A1
SERIAL NO

17422830

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Abstract

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Provided is a negative electrode active material which is excellent in capacity, capacity retention ratio, and a coulombic efficiency when charging/discharging is repeated. The chemical composition of the alloy particles of the negative electrode active material of the present disclosure includes 0.50 to 3.00 mass % of oxygen, and alloy elements containing Sn: 13.0 to 40.0 at % and Si: 6.0 to 40.0 at %, with the balance being Cu and impurities. The structure of the alloy particles includes: one or more types selected from the group consisting of a phase having a D03 structure, and a δ phase; one or more types selected from the group consisting of an ε phase and an η′ phase; and a SiOx phase (x=0.50 to 1.70). The SiOx phase (x=0.50 to 1.70) has a volume fraction of 5.0 to 60.0% and the η′ phase has a volume fraction of 0 to 60.0%.

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL CORPORATIONCHIYODA-KU TOKYO 100-8071

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Amino, Takafumi Tokyo, JP 8 35
Nagata, Tatsuo Tokyo, JP 33 208
Taniguchi, Shunsuke Tokyo, JP 18 96
Taniyama, Akira Tokyo, JP 23 116
Yamamoto, Sukeyoshi Tokyo, JP 16 40

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