Tian Jingyu, Zhang Jingjia, Li Xiaofeng
College of Chemical and Chemistry, Harbin Normal University Harbin 150025 P. R. China.
RSC Adv. 2024 Mar 21;14(14):9587-9593. doi: 10.1039/d4ra00361f. eCollection 2024 Mar 20.
Transition metal sulfides have been considered as promising electrode materials for future super-capacitors due to their spinel structures and environmentally friendly properties. Among these materials, NiCoS compounds exhibit high theoretical specific capacity but poor cycling performance. To address this issue, we synthesize several NiCoS urchin balls. The NCS-1.5 nanospheres demonstrate a specific capacitance of 1352.2 F g at a current density of 1 A g, and maintain high specific capacity after 10 000 charge-discharge cycles. An asymmetric capacitor assembled with the NCS-1.5 sample as the cathode and activated carbon as the anode achieve an energy density of 45.5 W h kg at 2025 W kg. The urchin-like nanospheres also facilitate the combination with other materials, providing potential insights for the synthesis of supercapacitor electrode materials.
过渡金属硫化物因其尖晶石结构和环境友好特性，被认为是未来超级电容器很有前景的电极材料。在这些材料中，NiCoS化合物展现出高理论比容量，但循环性能较差。为解决这一问题，我们合成了几种NiCoS海胆球。NCS-1.5纳米球在1 A g的电流密度下表现出1352.2 F g的比电容，并在10000次充放电循环后保持高比容量。以NCS-1.5样品为阴极、活性炭为阳极组装的不对称电容器在2025 W kg时实现了45.5 W h kg的能量密度。这种海胆状纳米球也便于与其他材料结合，为超级电容器电极材料的合成提供了潜在的见解。
