Abstract Binary transition metal phosphides have been considered as promising electrode materials for high-performance supercapacitors. Herein, NiCoP/carbon nanoparticles (NiCoP/CNPs) hollow microspheres electrode material has been rationally prepared by using a facile and efficient strategy, and the synergistic effect of NiCoP and CNPs on the enhanced electrochemical performance is explored. The optimized NiCoP/CNPs electrode with capacitive dominated feature can deliver a high specific capacitance of 2599.8 F g −1 at 1 A g −1 and as well as a long cycling life with 89.4% retention after 6000 cycles at 20 A g −1. Charge storage analysis reveals that the capacitive dominated feature of NiCoP/CNPs electrode is observed. Additionally, the as-synthesized asymmetric supercapacitor by using NiCoP/CNPs electrode exhibited a maximum energy density of 54.7 Wh kg−1 at 794.7 W kg−1 and a maximum power density of 16,040.0 W kg−1 (for an energy density of 4.1 Wh kg−1). Besides, it displays excellent cyclic stability with 90.6% capacity retention after 10,000 cycles at 20 A g−1. These remarkable electrochemical performances demonstrate that NiCoP/CNPs composite has excellent potential applications in high efficient electrochemical supercapacitor.

中文翻译：

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用于高性能非对称超级电容器的模板辅助合成空心球状NiCoP/碳纳米粒子复合材料

摘要 二元过渡金属磷化物被认为是用于高性能超级电容器的有前途的电极材料。在此，采用简便高效的策略合理制备了NiCoP/碳纳米颗粒（NiCoP/CNPs）空心微球电极材料，并探讨了NiCoP和CNPs对增强电化学性能的协同作用。具有电容主导特性的优化的 NiCoP/CNPs 电极在 1 A g -1 下可提供 2599.8 F g -1 的高比电容，并且在 20 A g -1 下 6000 次循环后具有 89.4% 的长循环寿命。电荷存储分析表明，观察到 NiCoP/CNPs 电极的电容主导特征。此外，使用 NiCoP/CNPs 电极合成的非对称超级电容器的最大能量密度为 54。7 Wh kg-1 在 794.7 W kg-1 和 16,040.0 W kg-1 的最大功率密度（能量密度为 4.1 Wh kg-1）。此外，它显示出优异的循环稳定性，在 20 A g-1 下循环 10,000 次后容量保持率为 90.6%。这些卓越的电化学性能表明，NiCoP/CNPs 复合材料在高效电化学超级电容器中具有出色的潜在应用。