The design of realistic bi-metallic hybrid electrodes with high performance and rich defects for high energy density supercapacitors is greatly desired. Herein, we report a novel bi-metallic heterogeneous electrode, Ni_x:V_y–Se/Zn–Co–P NWAs, made by a simple and practical process. The Zn–Co–P NWs, as the base materials, are synthesized through a two-step process: hydrothermal reaction and phosphorization via chemical vapor deposition (CVD). The high electrochemical performance Ni_x:V_y–Se nanoparticles are uniformly deposited via a simple electrodeposition technique to form a Ni_x:V_y–Se/Zn–Co–P NWA heterogeneous porous electrode structure. Owing to the high conductivity of the bimetallic selenide nanoparticles and phosphide-based material, the optimal Ni_x:V_y–Se/Zn–Co–P NWA electrode displays enhanced specific and areal capacity. Most significantly, an asymmetric supercapacitor (ASC) assembled with Ni_x:V_y–Se/Zn–Co–P NWAs (positive electrode) and an Fe₂O₃@CNFs/N-rGO aerogel (negative electrode) exhibits a wider operating potential range of 1.7 V, a superb energy storage capacity of 123.6 W h kg⁻¹ at 1050.2 W kg⁻¹, and excellent cycling properties with a retention capacity of 95.8% after 10 000 cycles.

中文翻译：

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用于高能量密度不对称超级电容器的 Nix:Vy–Se 纳米粒子装饰的分层多孔 Zn–Co–P 纳米线阵列电极


非常需要为高能量密度超级电容器设计具有高性能和丰富缺陷的现实双金属混合电极。在此，我们报道了一种新型双金属异质电极，Ni _x :V _y –Se/Zn-Co-P NWA，该电极通过简单实用的工艺制成。 Zn-Co-P NWs 作为基础材料，通过两步过程合成：水热反应和化学气相沉积（CVD）磷化。高电化学性能的 Ni _x :V _y –Se 纳米粒子通过简单的电沉积技术均匀沉积，形成 Ni _x :V _y –Se/Zn-Co-P NWA 异质多孔电极结构。由于双金属硒化物纳米颗粒和磷化物基材料的高电导率，最佳的 Ni _x :V _y –Se/Zn-Co-P NWA 电极表现出增强的比容量和面积容量。最重要的是，由 Ni _x :V _y –Se/Zn–Co–P NWAs（正极）和 Fe ₂ O ₃ @CNFs/N-rGO 气凝胶（负极）组装的不对称超级电容器（ASC）表现出更广泛的工作范围电位范围为1.7 V，在1050℃时具有123.6 W h kg ^-1的卓越储能容量。2 W kg ^-1 ，以及优异的循环性能，10 000次循环后容量保持率为95.8%。