期刊
DALTON TRANSACTIONS
卷 50, 期 46, 页码 17181-17193出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1dt03196a
关键词
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资金
- National Natural Science Foundation of China [51902122]
- Natural Science Foundation of Hubei Province [2019CFB262]
- Science and Technology Innovation Team Plan for Youths in the Universities of Hubei Province [T2020021]
The study demonstrated that the three-dimensional hierarchical CoFeP@nickel-manganese sulfide nanoarrays constructed on a flexible carbon cloth have enhanced electrical conductivity and efficient ion diffusion, leading to improved performance for hybrid supercapacitor applications.
Transition metal phosphide electrodes, particularly those with unique morphologies and micro-/nanostructures, have demonstrated desirable capabilities for hybrid supercapacitor applications by virtue of their superior electrical conductivity and high electrochemical activity. Here, three-dimensional hierarchical CoFeP@nickel-manganese sulfide nanoarrays were in situ constructed on a flexible carbon cloth via a hydrothermal method, a phosphorization process, followed by an electrodeposition approach. In this smart nanoarchitecture, CoFeP nanorods grown on carbon cloth act as the conductive core for rapid electron transfer, while the nickel-manganese sulfide nanosheets decorated on the surface of CoFeP serve as the shell for efficient ion diffusion, forming a stable core-shell heterostructure with enhanced electrical conductivity. Benefiting from the synergy of the two components and the generation of a heterointerface with a modified electronic structure, The CoFeP@nickel-manganese sulfide electrodes deliver a high capacity of 260.7 mA h g(-1) at 1 A g(-1), excellent rate capability, and good cycling stability. More importantly, an aqueous hybrid supercapacitor based on CoFeP@nickel-manganese sulfide as a positive electrode and a lotus pollen-derived hierarchical porous carbon as a negative electrode is constructed to display a maximum energy density of 60.1 W h kg(-1) at 371.8 W kg(-1) and a good cycling stability of 85.7% capacitance retention after 10 000 cycles.
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