College of Chemistry, Guangdong University of Petrochemical Technology, Maoming, 525000, China.
College of Chemistry and Chemical Engineering, Harbin Normal University, Harbin, 150025, China.
Dalton Trans. 2023 May 22;52(20):6823-6830. doi: 10.1039/d3dt00390f.
Transition metal sulfides (TMSs) are considered as one of the promising electrode materials due to their fascinating redox reversibility and electronic conductivity. However, volume expansion during the charge/discharge process impedes their practical applications. The reasonable design of TMS electrode materials with unique morphology can improve the energy storage performance. Herein, we prepared the NiS/CoS/NiS composite that is grown on Ni foam (NF) a one-step electrodeposition process. The optimized NiS/CoS/NiS-7 shows a superhigh specific capacity of 2785.3 F g at 1 A g and remarkable rate capability. Furthermore, the as-assembled device displays a high energy density of 40.1 W h kg at a power density of 799.3 W kg and a satisfactory stability of 96.6% retention after 5000 cycles. This work provides a facile way to fabricate new TMS electrode materials for high-performance supercapacitors.
过渡金属硫化物（TMSs）由于其迷人的氧化还原可逆性和电子导电性，被认为是有前途的电极材料之一。然而，在充放电过程中的体积膨胀阻碍了它们的实际应用。通过合理设计具有独特形态的 TMS 电极材料，可以提高储能性能。在这里，我们通过一步电沉积过程制备了生长在 NF 上的 NiS/CoS/NiS 复合材料。优化后的 NiS/CoS/NiS-7 在 1 A g 下具有超高的比容量 2785.3 F g-1，并且具有出色的倍率性能。此外，组装后的器件在 799.3 W kg 的功率密度下具有 40.1 W h kg 的高能量密度，在 5000 次循环后保持了 96.6%的优异稳定性。这项工作为高性能超级电容器提供了一种制造新型 TMS 电极材料的简便方法。
