Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
ACS Appl Mater Interfaces. 2013 Feb;5(3):686-90. doi: 10.1021/am302164e. Epub 2013 Jan 28.
Composite materials including NiS active materials, sulfide-based solid electrolytes (SE), and conductive additives (VGCF: vapor grown carbon fiber) were prepared by coating a highly conductive Li(2)S-P(2)S(5) solid electrolyte onto NiS-VGCF composite using pulsed laser deposition (PLD). From scanning electron microscopy, NiS nanoparticles were on VGCF surface after coating of solid electrolytes using PLD. All-solid-state cells using the SE-coated NiS-VGCF composite and the uncoated NiS-VGCF composite were fabricated, and then the coating effects on the electrochemical performance by forming the SE thin film onto the NiS-VGCF composite were investigated. At a high current density of 3.8 mA cm(-2) (corresponding to ca. 1 C), an all-solid-state cell fabricated using the SE-coated NiS-VGCF composite as a working electrode showed the initial discharge capacity of 300 mA h g(-1), and exhibited better cycle performance than the cell using the uncoated NiS-VGCF composite.
采用脉冲激光沉积（PLD）法，将高导电性的 Li(2)S-P(2)S(5) 固体电解质涂覆到 NiS-VGCF 复合电极上，制备了包含 NiS 活性材料、基于硫化物的固体电解质（SE）和导电添加剂（VGCF：气相生长碳纤维）的复合材料。通过扫描电子显微镜观察，发现 PLD 涂覆固体电解质后，NiS 纳米颗粒附着在 VGCF 表面。制备了使用 SE 涂覆的 NiS-VGCF 复合电极和未涂覆的 NiS-VGCF 复合电极的全固态电池，研究了通过在 NiS-VGCF 复合电极上形成 SE 薄膜对电化学性能的影响。在 3.8 mA cm(-2)（约为 1 C）的高电流密度下，使用 SE 涂覆的 NiS-VGCF 复合电极为工作电极的全固态电池的初始放电容量为 300 mA h g(-1)，表现出比使用未涂覆的 NiS-VGCF 复合电极的电池更好的循环性能。
