Electrode current collector and method for inspecting the same, electrode for battery and method for producing the same, and secondary battery and method for producing the same
AssigneeSony Corporation
InventorsMasayuki Iwama, Kenichi Kawase, Rikako Imoto, Akinori Kita, Kotaro Satori
Life of this patent
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Abstract
A current collector forming an electrode for battery. The electrode current collector is made of copper or a copper alloy, and has a front surface color and a back surface color, at least one color of which is a color belonging to a color space represented by: 50≦L*≦80, 5≦a*<60, 5≦b*<60, where L*, a*, and b* are numeric values determined based on the L*a*b* calorimetric system described in JIS Z 8729.
Claims32
A current collector forming an electrode for battery,
- wherein the electrode current collector being made of copper or a copper alloy,
- wherein the electrode current collector has a front surface color and a back surface color, at least one color of which is a color belonging to a color space represented by:
- 50≦L*≦80, 5≦a*<60, 5≦b*<60,
- where L*, a*, and b* are numeric values determined based on the L*a*b* calorimetric system described in JIS Z 8729.
A method for inspecting an electrode current collector forming an electrode for battery and being made of copper or a copper alloy, the method comprising:
- obtaining value(s) of the front surface color or the back surface color or both of each electrode current collector based on the L*a*b* calorimetric system described in JIS Z 8729, and
- selecting an electrode current collector having a color belonging to a color space represented by:
- 50≦L*≦80, 5≦a*<60, 5≦b*<60
- as a conforming article.
A method for producing an electrode for battery having an electrode current collector made of copper or a copper alloy,
- the method comprising:
- obtaining value(s) of the front surface color or the back surface color or both of each electrode current collector based on the L*a*b* calorimetric system described in JIS Z 8729,
- selecting an electrode current collector having a color belonging to a color space represented by:
- 50≦L*≦80, 5≦a*<60, 5≦b*<60
- as a conforming article, and
- producing an electrode for battery using the selected electrode current collector.
A method for producing a secondary battery comprising an electrode for battery having an electrode current collector made of copper or a copper alloy,
- the method comprising:
- obtaining value(s) of the front surface color or the back surface color or both of each electrode current collector based on the L*a*b* calorimetric system described in JIS Z 8729,
- selecting an electrode current collector having a color belonging to a color space represented by:
- 50≦L*≦80, 5≦a*<60, 5≦b*<60
- as a conforming article,
- producing an electrode for battery using the selected electrode current collector, and
- incorporating the produced electrode into a secondary battery.
Dependencies are inferred from the claim text.