NONAQUEOUS-ELECTROLYTE BATTERY AND METHOD FOR PRODUCING THE SAME

摘要

Provided are a Li-ion battery (nonaqueous-electrolyte battery) 100 that includes a positive-electrode active-material layer 12, a negative-electrode active-material layer 22, and a sulfide-solid-electrolyte layer 40 disposed between the active-material layers 12 and 22. The sulfide-solid-electrolyte layer 40 includes a sulfur-added layer 43 in an intermediate portion in the thickness direction of the sulfide-solid-electrolyte layer 40. The sulfur-added layer 43 has a higher content of elemental sulfur than any other portion of the sulfide-solid-electrolyte layer 40. The sulfur-added layer 43 substantially does not have any pin holes. The sulfur-added layer 43 is formed by laminating a positive-electrode body 1 and a negative-electrode body 2 that are individually prepared and subjecting the electrode bodies 1 and 2 to a heat treatment so that a positive-electrode-side sulfur-added layer 14 of the positive-electrode body 1 and a negative-electrode-side sulfur-added layer 24 of the negative-electrode body 2 are softened and integrated.