CURRENT COLLECTOR COPPER FOIL OF NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, METHOD OF MANUFACTURING THE CURRENT COLLECTOR COPPER FOIL OF NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, METHOD OF MANUFACTURING THE NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

PROBLEM TO BE SOLVED: To maintain sufficient mechanical strength even after experienced heat treatment in a manufacturing process of a negative electrode for a lithium ion secondary battery.SOLUTION: A current collector copper foil 10 of a negative electrode for a lithium ion secondary battery conta...

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Hauptverfasser:	SEKI SOSHI, SAWAI YOSHIKI
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS BASIC ELECTRIC ELEMENTS CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY ELECTRICITY FERROUS OR NON-FERROUS ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS METALLURGY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION TECHNICAL SUBJECTS COVERED BY FORMER USPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To maintain sufficient mechanical strength even after experienced heat treatment in a manufacturing process of a negative electrode for a lithium ion secondary battery.SOLUTION: A current collector copper foil 10 of a negative electrode for a lithium ion secondary battery contains 0.15-0.40 wt.% of Cr, with the balance comprising Cu, wherein a Cr solid solution index Z in the following formula (1) is 0.05≤Z≤0.3. (1) Z=(R-R)/(R-R), wherein Ris an actual measured value (%IACS) of conductivity R of the current collector copper foil of a negative electrode, Ris a calculated value (%IACS) of conductivity R of the current collector copper foil 10 of a negative electrode when the entire Cr is solid-soluted, and Ris a calculated value (%IACS) of conductivity R of the current collector copper foil 10 of a negative electrode when the entire Cr is precipitated.