NOVELTY - An electrolyte sheet comprises electrolyte layer containing electrolyte particles and binder and base material laminated on electrolyte layer. Ionic conductivity of electrolyte particles is greater than or equal to 1x 10-5 S/cm. Ratio of weight of electrolyte particles with respect to total weight of binder is 50-99.5 wt.%. Electrolyte particles and binder do not remain in base material after transfer of electrolyte layer. A 100 mu m-thick positive electrode layer is manufactured by coating positive electrode slurry to 20 mu m-thick aluminum sheet and drying at 80 degrees C for 10 minutes on hot plate.    USE - An electrolyte sheet for battery used for apparatus (all claimed) e.g. power supply apparatus.    ADVANTAGE - Electrolyte layer can be easily formed in battery.    DETAILED DESCRIPTION - An electrolyte sheet comprises electrolyte layer containing electrolyte particles and binder and base material laminated on electrolyte layer. Ionic conductivity of electrolyte particles is greater than or equal to 1x 10-5 S/cm. Ratio of weight of electrolyte particles with respect to total weight of binder is 50-99.5 wt.%. Electrolyte particles and binder do not remain in base material after transfer of electrolyte layer. A 100 mu m-thick positive electrode layer is manufactured by coating positive electrode slurry to 20 mu m-thick aluminum sheet, drying at 80 degrees C for 10 minutes on hot plate, and vacuum-drying laminated body of positive electrode layer and aluminum at 80 degrees C for 4 hours. Positive electrode slurry contains positive electrode active material, electrolyte particles, binder, and solvent at weight ratio of 19:19:2:60. Positive electrode active material is obtained by mixing 0.4 g sulfur and 0.4 g porous carbon in sealed stainless steel container, heating from room temperature to 150 degrees C at 10 degrees C/minute, maintaining temperature to 150 degrees C for 6 hours, maintaining temperature to 300 degrees C, heating at 10 degrees C/minute, and naturally cooling for 2.75 hours. Transfer test involves allowing electrolyte sheet with radius of 16.5 mm phi and positive electrode sheet with radius of 16.5 mm phi to accumulate so that electrolyte layer and positive electrode layer may contact, inserting sheets inside metal mold, pressurizing at 270 MPa for 10 s, taking out electrolyte sheet and positive electrode sheet from metal mold, peeling base material of electrolyte sheet, peeling joint surface of electrolyte layer, and observing positive electrode layer. INDEPENDENT CLAIMS are included for:    (1) battery provided with electrolyte layer of electrolyte sheet; and    (2) electrolyte slurry containing electrolyte particles, binder, and solvent, wherein average particle diameter (D50) of electrolyte particle is 5-50 nm, slurry contains 20-90 wt.% solid, and weight ratio of electrolyte particle with respect to solid is 50-99.5 wt.%.