Zhao Liang, Lei Shuijin, Tang Changcun, Tu Qunying, Rao Lihui, Liao Huanxi, Zeng Weihang, Xiao Yanhe, Cheng Baochang
School of Materials Science and Engineering, Nanchang University, Nanchang, Jiangxi 330031, PR China.
School of Materials Science and Engineering, Nanchang University, Nanchang, Jiangxi 330031, PR China.
J Colloid Interface Sci. 2022 Jun 15;616:401-412. doi: 10.1016/j.jcis.2022.02.089. Epub 2022 Feb 22.
Two-dimensional (2D) layered materials hold great promise for electrochemical energy storage due to their unique structure. It is always desirable to explore new-type high-performance 2D structured electrode materials in energy field. In this work, layered transition-metal chalcogenophosphite is developed as the electrode material for supercapacitors for the first time. NiPS nanosheet arrays are successfully in-situ grown on carbon cloth via a chemical vapor deposition method, and then directly used as the self-supported electrode for supercapacitors. The fabricated carbon cloth supported NiPS nanosheet arrays offer obviously superior electrochemical performance to the powdery NiPS nanosheets sample. The self-supported NiPS electrode exhibits a high specific capacitance of 1148F g at a current density of 1 A g, and a good cycling stability with capacitance retention of 81.4% over 5000 cycles at 10 A g. Moreover, the assembled asymmetric supercapacitor device delivers a specific capacitance of 61.3F g at a current density of 1 A g, and an energy density of 19.2 Wh kg at a power density of 750 W kg with a voltage window of 1.5 V. This work is of great significance for pioneering the application of 2D transition-metal chalcogenophosphites in supercapacitors.
二维（2D）层状材料因其独特的结构在电化学储能方面具有巨大潜力。在能源领域探索新型高性能二维结构电极材料一直是人们所期望的。在这项工作中，层状过渡金属硫代亚磷酸盐首次被开发用作超级电容器的电极材料。通过化学气相沉积法成功地在碳布上原位生长出NiPS纳米片阵列，然后直接用作超级电容器的自支撑电极。所制备的碳布负载NiPS纳米片阵列展现出明显优于粉末状NiPS纳米片样品的电化学性能。自支撑NiPS电极在电流密度为1 A g时表现出1148F g的高比电容，并且在10 A g下经过5000次循环具有良好的循环稳定性，电容保持率为81.4%。此外，组装的不对称超级电容器装置在电流密度为1 A g时提供61.3F g的比电容，在功率密度为750 W kg、电压窗口为1.5 V时具有19.2 Wh kg的能量密度。这项工作对于开拓二维过渡金属硫代亚磷酸盐在超级电容器中的应用具有重要意义。
