Ni/Co selenide (NCSe), which has a high theoretical capacity and a lot of redox activity, is a candidate for high-performance supercapacitor electrode materials. With its poor reaction kinetics, it performs electrochemically much less efficiently than it should. Herein, we first synthesized MOF-derived zero-dimensional (0D)/two-dimensional (2D) (Ni, Co)Se₂ @CoP/CNFs@CF (carbon and nitrogen framework) hierarchical heterogeneous nanosheet arrays. The charge transport is accelerated by the Coulomb forces of the built-in electric field created by the electron rearrangement at the heterointerface of (Ni, Co) Se₂ @CoP/CNFs@CF. Moreover, the 0D/2D micro-nanostructure promotes interlayer shuttling and the penetration of electrolyte ions while combining the benefits of 0D and 2D materials. The two synergistically accelerate the reaction kinetics of the electrode. As expected, (Ni, Co)Se₂ @CoP/CNFs@CF has an excellent specific capacity (431.7 mAh g⁻¹, 1 A g⁻¹). In addition, the hybrid supercapacitor (Ni, Co)Se₂ @CoP/CNFs@CF//AC (activated carbon) has an ultra-high energy density (85.31 Wh kg⁻¹, 800 W kg⁻¹) and cycling stability (10,000 cycles, 113.72%). This is the P/Se hybrid metal compound electrode's best electrochemical performance to date. This work offers a method for fabricating electrodes with heterostructures for high energy density hybrid supercapacitors by enhancing the attributes of the electrode structure and interface.

Ni/Co硒化物（NCSe）具有很高的理论容量和大量的氧化还原活性，是高性能超级电容器电极材料的候选材料。由于反应动力学较差，它的电化学性能远低于应有的效率。在此，我们首先合成了 MOF 衍生的零维 (0D)/二维 (2D) (Ni, Co)Se 2 @ _CoP /CNFs@CF（碳和氮框架）分层异质纳米片阵列。_{由 (Ni, Co) Se 2}的异质界面处的电子重排产生的内置电场的库仑力加速了电荷传输@CoP/CNFs@CF。此外，0D/2D微纳结构促进了层间穿梭和电解质离子的渗透，同时结合了0D和2D材料的优点。两者协同加速电极的反应动力学。正如预期的那样，(Ni, Co)Se ₂ @CoP/CNFs@CF 具有优异的比容量（431.7 mAh g ^-1 , 1 A g ^-1）。此外，混合超级电容器(Ni, Co)Se ₂ @CoP/CNFs@CF//AC（活性炭）具有超高能量密度（85.31 Wh kg ⁻¹ , 800 W kg ⁻¹) 和循环稳定性（10,000 次循环，113.72%）。这是迄今为止 P/Se 混合金属复合电极的最佳电化学性能。这项工作提供了一种通过增强电极结构和界面的属性来制造高能量密度混合超级电容器异质结构电极的方法。