NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, ITS MANUFACTURING METHOD, AND POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To suppress generation of a short circuit on the inside of a nonaqueous electrolyte secondary battery without decreasing the capacity of the nonaqueous electrolyte secondary battery by increasing tensile elongation of a positive electrode even when the nonaqueous electrolyte secondary battery is collapsed by crushing.

SOLUTION: The nonaqueous electrolyte secondary battery includes a positive electrode having a positive active material layer containing a positive active material and a binder on a positive current collector, a negative electrode, a porous insulating layer arranged between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The tensile elongation of the positive electrode is not less than 3.0%. The positive current collector is made of aluminum containing iron.

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