| abstract |
PROBLEM TO BE SOLVED: To provide a high-capacity flat battery having a package which is thin, has a sufficient sealing function and mechanical strength, and does not corrode even when applied to a positive electrode having a noble potential. provide. SOLUTION: The flat battery according to the present invention has a package and current collector of a positive electrode, a clad material of aluminum and stainless steel, aluminum is disposed inside and stainless steel is disposed outside, and a package and current collector of a negative electrode are provided. Is a clad material of a metal selected from copper, iron or nickel and stainless steel, and copper, iron or nickel is inside and stainless steel is outside. |