|Budget Amount *help
¥22,620,000 (Direct Cost: ¥17,400,000、Indirect Cost: ¥5,220,000)
Fiscal Year 2009: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2008: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
Fiscal Year 2007: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Development of all-solid-state lithium secondary batteries with high safety and reliability is highly demanded. In the present study, phosphorus-based anode materials and sulfur-based cathode materials with high capacity were mechanochemically synthesized. The mechanchemical process was also applied to the formation of a favorable contact among the active materials, a sulfide electrolyte and a conductive additive. It was found that surface modification of high-voltage cathodes with oxide and sulfide thin-films with lithium conductivity was effective in enhancing rate capability and energy density of solid-state batteries.