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Engineering the grain boundary: a promising strategy to configure NiCoP4O12/NiCoP nanowire arrays for ultra-stable supercapacitor
Frontiers of Chemical Science and Engineering ( IF 4.5 ) Pub Date : 2022-02-27 , DOI: 10.1007/s11705-021-2132-0
Mengqi Cui 1 , Zining Wang 1 , Yuanye Jiang 1 , Hui Wang 1, 2
Affiliation  

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.



中文翻译:

设计晶界:为超稳定超级电容器配置 NiCoP4O12/NiCoP 纳米线阵列的有前景的策略

采用水热法和热解法合成了具有可调晶界密度和孔的NiCoP 4 O 12 /NiCoP纳米棒状阵列,其中通过X射线光电子能谱表征的Ni和Co原子的电子结构被同时逆向操纵. 优化后的NiCoP 4 O 12 /NiCoP阵列在1 mA·cm -2下具有507.8 µAh·cm -2的高比电容,以及在电流密度增加30倍时保持64.7%的良好倍率能力。重要的是,在由 NiCoP 4 O 12组装的不对称电池中实现了超稳定的能力,在 10000 次循环后保持 88.5%/NiCoP 阵列与活性炭。此外,不对称电池的能量和功率密度高于其他工作,表明所制备的NiCoP 4 O 12 /NiCoP阵列是用于超级电容器的有前途的电极。

更新日期:2022-02-27
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