Enhanced electrochemical performance of ball milled CoO for supercapacitor applications
Enhanced electrochemical performance of ball milled CoO for supercapacitor applications
复制标题
增强球磨 CoO 的电化学性能,用于超级电容器应用
DOI:
10.1039/c4ta02885f
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发表时间:
2014-09
影响因子:
11.9
通讯作者:
Hou Jianhua
中科院分区:
文献类型:
--
作者:
Zheng Chunrui;Cao Chuanbao;Ali Zulfiqar;Hou Jianhua
In the present work, we report the enhanced electrochemical performance of ball milled CoO nanoparticles for supercapacitor applications. The mechanical ball milling provides clean physical processes to prepare nanoparticles from CoO micropowders for excellent electrochemical performances. The performances of CoO samples at different milling times have been researched. With the increase of milling time the specific capacitance of CoO samples increases. The average size of CoO nanoparticles which have been milled for 96 h is estimated to be 5–20 nm by Transmission Electron Microscopy (TEM) analysis showing clear edges having superior boundary crystallinity. This clear edge superior boundary crystalline shape favours rapid electron and ion transport. The electrochemical behaviour is analyzed in a three electrode system using 1 M KOH solution as the electrolyte in terms of cyclic voltammetry, cyclic charge–discharge, and electrochemical impedance spectra. The CoO nanoparticle electrode exhibits a specific capacitance of 600 F g−1 at 0.5 A g−1 constant discharge current density. The high specific capacitance and the stability of the CoO nanoparticle electrode are attributed to good crystallinity and large specific surface area. The specific capacity retention is 96.6% at a current density of 2 A g−1 and 95.3% at a current density of 4 A g−1 over 2000 charge–discharge cycles. The excellent cyclic stability indicates that nanocrystalline CoO is an excellent supercapacitor electrode material.
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影响因子:
17.1
作者:
Peng, Chengxin;Chen, Bingdi;Yang, Jinhu
通讯作者:
Yang, Jinhu
DOI:
10.1039/c2ta00160h
发表时间:
2013
期刊:
Journal of Material Chemistry A
影响因子:
--
作者:
王斐;杨平雄;王连卫;Paul K. Chu
通讯作者:
Paul K. Chu
影响因子:
3.5
作者:
Li, Qunqing;Jiang, Kaili;Zhou, Ruifeng;Meng, Chuizhou;Zhu, Feng;Liu, Changhong;Fan, Shoushan
通讯作者:
Fan, Shoushan
影响因子:
6.7
作者:
S. Meher;P. Justin;G. R. Rao
通讯作者:
S. Meher;P. Justin;G. R. Rao
影响因子:
11.9
作者:
Zhi, Jian;Deng, Sheng;Zhang, Yuxuan;Wang, Youfu;Hu, Aiguo
通讯作者:
Hu, Aiguo