All-solid-state lithium battery with sulfur/carbon composites as positive electrode materials.

Abstract: Sulfur–carbon composites were investigated as positive electrode materials for all-solid-state lithium ion batteries with an inorganic solid electrolyte (amorphous Li3PS4). The elemental sulfur was mixed with Vapor-Grown Carbon Fiber (VGCF) and with the solid electrolyte (amorphous Li3PS4) by using high-energy ball-milling process. The obtained sulfur–VGVF–solid electrolyte composite was used as positive electrode materials of the all-solid-state battery. The composite showed good electrochemical properties as positive electrode materials. The capacity that was calculated on the base of the weight of sulfur was about 1300mAhg−1 at room temperature, when the all-solid-state battery was discharged and charged in the voltage range of 0.9 to 2.6V at a constant current density of 0.1mAcm−2. The battery kept the capacity more than 1200mAhg−1 even after 50 discharge–charge cycles. [Copyright &y& Elsevier]