All-Solid-State Lithium Battery with LiCo[sub 0.3]Ni[sub 0.7]O[sub 2] Fine Powder as Cathode Materials with an Amorphous Sulfide Electrolyte

An all-solid-state battery was fabricated with fine powder as cathode materials. The fine powder was synthesized with oxalate decomposition methods and the average particle size of the powder was 2 μm diam. In the all-solid-state battery, powder, which was prepared by a mechanical milling process, was used as the solid electrolyte. The anode was metallic indium foil 0.127 mm thick. The charge-discharge cycling test of the battery was carried out under a constant current density of 64 μA cm −2 with a 3.8 and 2.0 V charge-discharge criteria. The battery showed a rechargeable specific capacity of 98 mAh g −1 based on the cathode materials. The charge-discharge cycle efficiency of the battery was almost unity after the second cycle.