Al-Si alloy current collector used for positive electrode for nonaqueous electrolyte secondary battery and method for producing the same, positive electrode for nonaqueous electrolyte secondary battery using the current collector and method for producing the same, and non-electrode using the positive electrode Water electrolyte secondary battery

摘要

PROBLEM TO BE SOLVED: To provide a positive electrode for a nonaqueous electrolytic secondary battery which is arranged so that the irreversible capacity of a negative electrode can be controlled with a stable charging potential in order to suppress the decrease in battery capacity owing to the irreversible capacity.SOLUTION: Provided are an aluminum-silicon alloy current collector used for a nonaqueous electrolytic secondary battery positive electrode and a manufacturing method thereof, a nonaqueous electrolytic secondary battery positive electrode having such current collector and a manufacturing method thereof, and a nonaqueous electrolytic secondary battery with such positive electrode. The Al-Si alloy current collector comprises an Al-Si alloy including 0.5-13 mass% of Si, and the balance consisting of Al and inevitable impurities, and has pores defined by metal walls. Of the difference in capacity between a charged state and a discharged state in initial charge and discharge, the current collector contributes to 5 mAh/g per unit mass or more.