Ferritic stainless steel sheet for current collectors for sulfide-based solid-state batteries, and method for manufacturing same

A ferritic stainless steel sheet for a current collector in a sulfide-based solid-state battery, wherein the ferritic stainless steel sheet has a chemical composition containing Cr in an amount in a range of 16 to 32 mass %;

• wherein the chemical composition further comprises:
• 0.001 to 0.050 mass % of C,
• 0.01 to 0.60 mass % of Si,
• 0.01 to 0.60 mass % of Mn,
• 0.050 mass % or less of P,
• 0.010 mass % or less of S,
• 0.01 to 0.50 mass % of Ni,
• 0.001 to 0.150 mass % of Al, and
• 0.050 mass % or less of N,
• wherein a surface of the ferritic stainless steel sheet has an uneven structure including recesses and protrusions, the protrusions having an average height of 29 nm or more and 32 nm or less and an average interval of 134 nm or more and 173 nm or less between the protrusions;
• wherein [Cr]/[Fe] that is a ratio of an atomic concentration of Cr present in a form other than a metal on the surface of the ferritic stainless steel sheet to an atomic concentration of Fe present in a form other than a metal on the surface of the ferritic stainless steel sheet is within a range of 1.2 to 1.5;
• and
• wherein the ferritic stainless steel sheet has a thickness of 5 μm or more and 30 μm or less.