Three-dimensional hierarchical interwoven nitrogen-doped carbon nanotubes/CoxNi1-x-layered double hydroxides ultrathin nanosheets for high-performance supercapacitors
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- 作者：Jian Wua ; b ; 1 ; Wei-Wei Liua ; 1 ; Yu-Xuan Wua ; Ting-Cha Weia ; Dongsheng Gengb ; Jun Meib ; Hao Liub ; mliuhao@gmail.com" class="auth_mail" title="E-mail the corresponding author ; Woon-Ming Laua ; b ; llau22@uwo.ca" class="auth_mail" title="E-mail the corresponding author ; Li-Min Liua ; limin.liu@csrc.ac.cn" class="auth_mail" title="E-mail the corresponding author
- 关键词：Layered double hydroxides ; Carbon nanotubes ; Nitrogen doping ; Supercapacitor ; First-principles calculations
- 刊名：Electrochimica Acta
- 出版年：2016
- 出版时间：10 June 2016
- 年：2016
- 卷：203
- 期：Complete
- 页码：21-29
- 全文大小：4072 K
文摘
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A facile, low-cost and scalable route has been developed to design and fabricate 3D hierarchical Ni foam/N-CNTs/CoxNi1-x-LDHs NSs electrodes.
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The Ni foam/N-CNTs/Co0.5Ni0.5-LDHs NSs electrode possesses the maximum specific capacitance of 2170 F g−1 (1 A g−1) and areal capacitance of 1.62 F cm−2 (1 mA cm−2).
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First-principles calculations further reveal that the Co doping can effectively reduce the band gap of Ni(OH)2 and increase the conductivity.