Steel foil for power storage device container, power storage device container, power storage device, and manufacturing method of steel foil for power storage device container

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United States of America Patent

PATENT NO 10205135
APP PUB NO 20170170436A1
SERIAL NO

15327590

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Abstract

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A steel foil for a power storage device container includes a rolled steel foil, a nickel layer formed on a surface of the rolled steel foil, and a chromium-based surface treatment layer formed on a surface of the nickel layer. The nickel layer includes an upper layer portion which is in contact with the chromium-based surface treatment layer and contains Ni of 90 mass % or more among metal elements, and a lower layer portion which is in contact with the rolled steel foil and contains Ni of less than 90 mass % among the metal elements and Fe. <111> polar density in a reverse pole figure of the nickel layer in a rolling direction is 3.0 to 6.0. The nickel layer has a sub-boundary which is a boundary between two crystals having a relative orientation difference of 2° to 5°, and a large angle boundary which is a boundary between two crystals having the relative orientation difference of equal to or more than 15°. The average value of a ratio L5/L15 between a boundary length L5 which is the length of the sub-boundary, and a boundary length L15 which is the length of the large angle boundary, is equal to or more than 1.0.

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL CORPORATION6-1 MARUNOUCHI 2-CHOME CHIYODA-KU TOKYO 100-8071

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Goto, Yasuto Kimitsu, JP 39 39
Ibaragi, Masaharu Kisarazu, JP 16 36
Ishizuka, Kiyokazu Himeji, JP 38 53
Nagasaki, Shuji Sagamihara, JP 14 76
Nose, Koichi Chiba, JP 64 285
Unno, Hiroto Yokohama, JP 12 18

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