School of Physics and Astronomy, Yunnan University, Kunming 650091, Yunnan Province, People's Republic of China.
Nanotechnology. 2020 Jan 17;31(4):045403. doi: 10.1088/1361-6528/ab4d0a. Epub 2019 Oct 11.
A high-performance supercapacitor electrode NiCoS (NCS) nanosheet on SiO@C core-shell nanospheres (SiO@C-NCS nanocomposite) is prepared via simple an effective solution-based method. Benefiting from compositional and structural advantages, the as-prepared SiO@C-NCS nanocomposite exhibits a high specific capacitance (625 F g at 1 mA cm) and a stable cycling performance. An asymmetric supercapacitor (ASC) assembled with SiO@C-NCS nanocomposite as a positive electrode and carbon nanotube paper as a negative electrode in aqueous KOH solution demonstrated a high energy density of 16 Wh kg at an ultra-high specific power of 7200 W kg. These promising results suggest the possible application of mixed transition metal sulfides-based composites as advanced electrode materials for high-performance ASCs.
通过简单有效的溶液法制备了一种高性能超级电容器电极 NiCoS（NCS）纳米片/SiO@C 核壳纳米球（SiO@C-NCS 纳米复合材料）。得益于组成和结构优势，所制备的 SiO@C-NCS 纳米复合材料表现出高比电容（在 1 mA cm 时为 625 F g）和稳定的循环性能。在水性 KOH 溶液中，以 SiO@C-NCS 纳米复合材料作为正极，碳纳米管纸作为负极组装的非对称超级电容器（ASC）在超高比功率 7200 W kg 时表现出 16 Wh kg 的高能量密度。这些有前景的结果表明，基于混合过渡金属硫化物的复合材料作为先进的超级电容器电极材料具有潜在的应用前景。
