Abstract Herein, the phosphorus-substituted nickel cobalt sulfides nanosheet arrays growth on nitrogen doped carbonic nanofibers (donated as Ni–Co–S–P) are prepared by an electrodeposition method. The morphologies and chemical composition of Ni–Co–S–P are investigated by SEM, TEM, XPS and EDS. The electrochemical properties of Ni–Co–S–P are tested by CV, GCD and EIS technologies. And the sample Ni–Co–S–P-4 displays the most outstanding electrochemical properties including electrocatalytic activity, rate capability and specific capacitance. In addition, the iron oxide nanosheets growth on N-CNFs (Fe–O/N-CNFs) are prepared by the same electrodepositing route. And they can serve as a negative electrode according to the electrochemical performances analysis. A hybrid supercapacitor based on the obtained electrodes is further assembled by using Fe–O/N-CNFs as negative electrode and Ni–Co–S–P as positive electrode. The as-fabricated hybrid supercapacitor show outstanding energy storage performance, it possesses a high energy density at 55.8 Wh·kg−1 corresponding to a power density at 402.9 W kg−1.

中文翻译：

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在用于高性能混合超级电容器的 N 掺杂碳纳米纤维上生长磷取代的 Ni-Co-S 和氧化铁纳米片

摘要 在此，通过电沉积方法制备了磷取代镍钴硫化物纳米片阵列生长在氮掺杂碳纳米纤维（以 Ni-Co-S-P 形式捐赠）上。Ni-Co-S-P 的形貌和化学成分通过 SEM、TEM、XPS 和 EDS 进行研究。Ni-Co-S-P 的电化学性能通过 CV、GCD 和 EIS 技术进行测试。并且样品 Ni-Co-S-P-4 显示出最出色的电化学性能，包括电催化活性、倍率性能和比电容。此外，在 N-CNFs (Fe-O/N-CNFs) 上生长的氧化铁纳米片是通过相同的电沉积途径制备的。根据电化学性能分析，它们可以用作负极。通过使用 Fe-O/N-CNFs 作为负极和 Ni-Co-S-P 作为正极，进一步组装基于所获得电极的混合超级电容器。制成的混合超级电容器显示出出色的储能性能，它具有 55.8 Wh·kg-1 的高能量密度，对应于 402.9 W kg-1 的功率密度。