| abstract |
(57) [Summary] [PROBLEMS] To suppress the occurrence of burrs at the time of cutting, and to easily cope with the creation of an electrode material having a complicated shape. SOLUTION: A negative electrode 11 is manufactured through a cutting step of cutting a sheet-like raw material 11A on which an active material layer 12 and an electrolyte layer 13 are formed into a predetermined electrode shape using a laser. |