Porous NiCo₂O₄/C nanofibers replicated by cotton template as high-rate electrode materials for supercapacitors

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• 作者：Liang HuangAuthor Vitae ; Wei Zhang ; Jinwei Xiang ; Yunhui Huang ; ^{huangyh@hust.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Porous NiCo2O4/C nanofibers ; Hydrothermal reaction ; Cotton fiber ; Supercapacitor
• 刊名：Journal of Materiomics
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：2
• 期：3
• 页码：248-255
• 全文大小：2837 K

文摘

Nanostructured binary transition oxides have been extensively developed as high-performance electrode materials for supercapacitors. The rational design of microstructure plays a decisive role of the electrochemical performance of fabricated electrode materials such as high specific surface area (SSA), meso-porous, short ion transferring path and high electrical and ion conductivity. Besides, the low manufacture cost is necessary for the mass production. In this paper, porous NiCo₂O₄/C nanofibers are replicated with cotton as template via hydrothermal route followed by annealing in air. As the electrode of supercapacitor, the porous NiCo₂O₄/C nanofibers show a high specific capacitance of 1029 F g⁻¹ at a current density of 1 A g⁻¹. Remarkably, such electrode material exhibits excellent rate capability. Even at a current density as high as 60 A g⁻¹, its specific capacitance still maintains 771 F g⁻¹. This high rate performance can be attributed to the porous structure, facilitating the ion transport in the electrode material.