Engineering the grain boundary: a promising strategy to configure NiCoP4O12/NiCoP nanowire arrays for ultra-stable supercapacitor
Mengqi Cui , Zining Wang , Yuanye Jiang , Hui Wang
Front. Chem. Sci. Eng. ›› 2022, Vol. 16 ›› Issue (8) : 1259 -1267.
Engineering the grain boundary: a promising strategy to configure NiCoP4O12/NiCoP nanowire arrays for ultra-stable supercapacitor
NiCoP4O12/NiCoP nanorod-like arrays with tunable grain boundary density and pores were synthesized by the processes composed of hydrothermal and pyrolysis, in which, the electron structure of Ni and Co atoms characterized by X-ray photoelectron spectroscopy was contemporaneous inverse manipulated. The optimized NiCoP4O12/NiCoP arrays have a high specific capacitance of 507.8 μAh∙cm–2 at 1 mA∙cm–2, and good rate ability of 64.7% retention at 30-folds increased current density. Importantly, an ultra-stable ability, 88.5% of retention after 10000 cycles, was achieved in an asymmetric cell assembled of the NiCoP4O12/NiCoP arrays with activated carbon. In addition, the energy and power densities of an asymmetric cell were higher than those of other work, demonstrating as-prepared NiCoP4O12/NiCoP arrays are promising electrodes for supercapacitors.
NiCo / array electrode / grain boundary / stability / supercapacitor
Higher Education Press
Supplementary files
/
| 〈 |
|
〉 |
PDF
(1897KB)
