| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolytic secondary battery on which an occupying rate of current collectors is reduced and which has high energy density by manufacturing the current collecting bodies on which rolling rupture is not caused and which has a high yield by forming a positive electrode current collector and a negative electrode current collector by using specific metal and specific metallic alloy whose tensile strengths have respectively a specific value. SOLUTION: A nonaqueous electrolytic secondary battery is provided with a chargeable-dischargeable positive electrode, nonaqueous electrolyte and a chargeable- dischargeable negative electrode. A positive electrode current collector of this positive electrode is formed of Al alloy whose tensile strength is not less than 100N/mm<2> . On the other hand, a negative electrode current collector is formed of Cu or Cu alloy whose tensile strength is not less than 250N/mm<2> or Ni alloy whose tensile strength is not less than 350N/mm<2> . Then, since tensile strength is large, at manufacturing time, the current collectors can be manufactured with a high yield without causing rolling rupture, and when these current collectors are used, since tensile strength is large, the nonaqueous electrolyte secondary battery on which an occupying rate of the current collectors is reduced and which has high energy density can be formed. |
