CURRENT COLLECTOR, ELECTRODE, SECONDARY BATTERY, AND CAPACITOR
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United States of America Patent
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Oct 22, 2015
app pub date -
Nov 18, 2013
filing date -
Nov 19, 2012
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Abstract
A current collector which can realize sufficient safety function even when the cell is deformed by external force or when the internal pressure is increased; and an electrode, a secondary battery, and a capacitor using the current collector; are provided. A current collector, including: a metal foil; and a conductive layer formed on a surface of the metal foil; is provided. Here, regarding the current collector, a temperature-resistance curve of the current collector obtained by sandwiching the current collector in between brass electrodes of 1 cm diameter, the measurement of resistance being performed with conditions of 15N of load between the electrodes and temperature being raised from ambient temperature at a rate of 10° C./min satisfies a relation of R(Ta+5)/R(Ta−5)≧1, R(Ta+5) being resistance at temperature Ta+5° C. and R(Ta−5) being resistance at temperature Ta−5° C., Ta being a temperature higher than a temperature satisfying a relation of (R(T)/R(T−5))>2.0 and first satisfying a relation of (R(T)/R(T−5))<2.0.
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