Xie Yanqiu, Wang Haoze, Garcia Nuñez Carlos, Gao Xin, Jiang Fan, Li Qian, Bai He, Yao Fei, Yue Hongyan
School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, People's Republic of China.
Electronics and Nanoscale Engineering, James Watt School of Engineering, University of Glasgow, Glasgow G12 8QQ, United Kingdom.
ACS Appl Mater Interfaces. 2025 Jul 9;17(27):39011-39021. doi: 10.1021/acsami.5c04503. Epub 2025 Jun 25.
Metal-organic frameworks (MOFs) and their derived heterostructures show significant potential in supercapacitors due to their unique electronic properties and interfacial effects. Here, Fe-doped NiV-MOF nanoflowers are synthesized on nickel foam (NF) via a solvothermal method, followed by in situ decoration of Ni-V-Fe phosphides (NiVFe-P) on the nanosheets to construct the island-like heterostructure (NiVFe-P@NiVFe-MOF/NF) through partial phosphorization. This island-like heterostructure possesses excellent electrical conductivity and adsorption performance, which are beneficial to enhance the rapid transfer efficiency of electrons/ions and the capability of charge storage. Therefore, NiVFe-P@NiVFe-MOF/NF delivers a high specific capacity (2319.3 C g at 1 A g) and a remarkable stability (87.2% retention after 10,000 cycles). The assembled hybrid supercapacitor (NiVFe-P@NiVFe-MOF/NF//AC/NF) achieves an energy density of 109.4 Wh kg at 1.16 kW kg with an outstanding cycle life (93.4% retention after 10,000 cycles). This work highlights the potential of island-like heterostructures as a promising strategy for developing advanced supercapacitor electrodes.
金属有机框架材料（MOFs）及其衍生的异质结构由于其独特的电子性质和界面效应，在超级电容器中显示出巨大的潜力。在此，通过溶剂热法在泡沫镍（NF）上合成了铁掺杂的镍钒-MOF纳米花，随后在纳米片上原位装饰镍钒铁磷化物（NiVFe-P），通过部分磷化构建岛状异质结构（NiVFe-P@NiVFe-MOF/NF）。这种岛状异质结构具有优异的导电性和吸附性能，有利于提高电子/离子的快速转移效率和电荷存储能力。因此，NiVFe-P@NiVFe-MOF/NF具有高比容量（在1 A g时为2319.3 C g）和显著的稳定性（10000次循环后保留率为87.2%）。组装的混合超级电容器（NiVFe-P@NiVFe-MOF/NF//AC/NF）在1.16 kW kg时实现了109.4 Wh kg的能量密度，具有出色的循环寿命（10000次循环后保留率为93.4%）。这项工作突出了岛状异质结构作为开发先进超级电容器电极的一种有前途策略的潜力。
