CURRENT COLLECTOR COPPER FOIL OF NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, METHOD OF MANUFACTUING THE CURRENT COLLECTOR COPPER FOIL OF NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, METHOD OF MANUFACTURING NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY
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United States of America Patent
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Issued Date -
Sep 5, 2013
app pub date -
Dec 27, 2012
filing date -
Mar 1, 2012
priority date (Note) -
Abandoned
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Abstract
There is provided a current collector copper foil of negative electrode for lithium ion secondary battery, including: at least 0.15 wt % or more and 0.40 wt % or less of Cr; and Cu as a remaining portion, wherein a Cr solid solution index Z is in a range of 0.05≦Z≦0.3 and represented by the following formula: Z=(RM−RS)/(RP−RS) . . . (1), wherein RM indicates an actually measured conductivity R (% IACS) of a negative battery current collector copper foil, and RS indicates a calculated value (% IACS) of conductivity R of the negative electrode current collector copper foil 10 in a case that a total content of Cr is solid-soluted, and conductivity RP indicates a calculated conductivity R (% IACS) of the negative electrode current collector copper foil 10 in a case that the total content of Cr is separated.
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