ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND BATTERY PACK
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United States of America Patent
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Mar 17, 2014
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Mar 26, 2012
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Abstract
An electrode for a nonaqueous electrolyte secondary battery of an embodiment has an active material layer containing an active material and a binder containing fluorine, and a current collector bound to the active material layer. When a thermal decomposition start temperature of the binder is T1° C. and a thermal decomposition end temperature of the binder is T2° C., one or more peaks are present in an ion chromatogram of any mass number selected at least from 81, 100, 132, and 200 in a thermal decomposition gas chromatography mass analysis at the thermal decomposition temperature of (T1+T2)/2° C. When a peak area at T1° C. is X, and a peak area at T2° C. is Y, the X and Y satisfy a relation of 2X≧Y.
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