The multi-compositional adjustment and distinctively architectural control have been challenging to modulate the electrochemical performance of favorable supercapacitor electrodes. Herein, three-dimensional hollow open frame-like architectures nickel cobalt phosphate with nitrogen doped carbon (Co_2−xNi_xP-N-C-2) converted from a metal-organic framework precursor is utilized as the functional electrode for supercapacitor, which delivers remarkable electrochemical performance in terms of exceptional capacitance reaching ~1374.7 C g⁻¹ (specific capacitance of ~3054.9 F g⁻¹) and ultra-long cycling longevity (a retention of ~91.7% after 10,000 cycles at 5 A g⁻¹). Furthermore, the assembled hybrid supercapacitor (HSC) device displays ultrahigh energy density of ~86 Wh kg⁻¹ at a maximum power density of ~800 W kg⁻¹. The superior performance can be attributed to: (I) 3D hollow open nanostructures provide sufficient electroactive sites and ion-diffusion “short-cuts”; (II) The introduction of phosphorus can adjust the band structure and gain a small band gap; (III) Bimetals enhance rich redox reactions; (IV) Nitrogen doped carbon ensures high conductivity and charge storage kinetics.

多成分调整和独特的结构控制对于调节有利的超级电容器电极的电化学性能具有挑战性。在此，从金属有机骨架前驱体转化而来的具有氮掺杂碳（Co _2-x Ni _x P-NC-2）的三维空心开放框架状结构磷酸镍钴用作超级电容器的功能电极，其提供卓越的电化学性能，在达到 ~1374.7 C g ^{-1 的}特殊电容（~3054.9 F g ^{-1 的}比电容）和超长循环寿命（5 A g ^{-1 下}10,000 次循环后保留 ~91.7%）。此外，组装的混合超级电容器（HSC）装置在~800 W kg ^-1的最大功率密度下显示出~86 Wh kg ^{-1 的}超高能量密度。优越的性能可归因于： (I) 3D 空心开放纳米结构提供足够的电活性位点和离子扩散“捷径”；（二）磷的引入可以调整能带结构，获得较小的带隙；(III) 双金属增强富氧化还原反应；(IV) 掺氮碳确保高导电性和电荷存储动力学。