Porous Fe3O4/carbon composite electrode material prepared from metal-organic framework template and effect of temperature on its capacitance

• Published in: Nano energy 2014-09, Vol.8, p.133-140
• Main Authors: Meng, Wenjun, Chen, Wei, Zhao, Lei, Huang, Yang, Zhu, Minshen, Huang, Yan, Fu, Yuqiao, Geng, Fengxia, Yu, Jie, Chen, Xianfeng, Zhi, Chunyi
• Format: Article
• Language: English
• Subjects: Composite; Fe3O4; Metal organic framework; Supercapacitor; Temperature effect
• ISSN: 2211-2855
• DOI: 10.1016/j.nanoen.2014.06.007

In this paper, we report a porous Fe3O4/carbon composite supercapacitor electrode material possessing great temperature variation-resistive long-term cycle stability. The material is prepared via a facile one-step calcination of an iron-based metal organic framework (Fe-MOF) template and composed of porous Fe3O4 nanoparticles and carbon as a result of a well-controlled incomplete annealing process of the MOF template. With this material as an electrode, a specific capacitance of 139Fg−1 at a discharging current density of 0.5Ag−1 can be achieved. More attractively, the specific capacitance is significantly increased when the working temperature is elevated from 0 to 60°C. Furthermore, even after 4000 cycles of charge–discharge at varied temperatures, 83.3% of the capacitance of the electrode material is retained, showing excellent temperature variation-resistive long-term cycle stability of the prepared composite electrode material. [Display omitted] •Metal organic framework was used as a template to prepare porous Fe3O4/carbon composite supercapacitor electrode materials.•Great capacitance performance of the fabricated electrode was achieved.•Excellent temperature variation-resistive long-term cycle stability was attained.