Morphology tuning of porous CoO nanowall towards enhanced electrochemical performance as supercapacitors electrodes
Morphology tuning of porous CoO nanowall towards enhanced electrochemical performance as supercapacitors electrodes
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多孔 CoO 纳米墙的形态调整以增强超级电容器电极的电化学性能
DOI:
10.1016/j.cattod.2018.03.024
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发表时间:
2019-06
期刊:
影响因子:
5.3
通讯作者:
Zhang Lei
中科院分区:
文献类型:
--
作者:
Tang Ning;Wang Wei;You Huihui;Zhai Zhangjie;Hilario Jonas;Zeng Liang;Zhang Lei
CoO with porous nanowall structure is fabricated by a combined solvothermal and annealing process. The micromorphology of CoO is fine-tuned by controlling the annealing temperature. Nano-sized pores below ∼50 nm are achieved at 400 °C annealing with a high specific surface area of 65 m2g−1. The unique porous nanowall structure leads to large surface areas and increase electrolyte/electrode interfaces, benefiting enhanced electrochemical performance of CoO. High specific capacitance of 352 F g−1has been obtained at 1 A g−1with good rate capability (72.7% capacitance retention from 1 to 20 A g−1) and good cycling stability (92.9% of initial capacitance after 5000 cycles), making it a promising electrode for supercapacitor.
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