In Situ Chemical Synthesis of MnO2/HMCNT Nanocomposite with a Uniquely Developed Three-Dimensional Open Porous Architecture for Supercapacitors
- 5 Downloads
The successful application of supercapacitors in energy conversion and storage hinges on the development of highly efficient and stable electrode materials. While a fast and facile synthesis of superior performance of supercapacitors is still a challenge. Motivated by this, MnO2/heteroatom-doped mesoporous carbon nanotubes (HMCNTs) with a uniquely developed three-dimensional open porous system containing mesopores and micropores are synthesized by a facile one-step chemical coprecipitation method for supercapacitor electrodes. The HMCNTs in the composite serve not only as the template for the growth of MnO2 particles, but also as the electrically conductive channel for electrochemical performance enhancement. The MnO2/HMCNTs nanocomposite electrode exhibits much larger specific capacitance compared with both the HMCNTs electrode and the pure MnO2 electrode and significantly improves rate capability compared to the pure MnO2 electrode. The superior supercapacitive performance of the MnO2/HMCNTs nanocomposite electrode is due to its high specific surface area and unique hierarchy architecture which facilitate fast electron and ion transport. Moreover, the MnO2/HMCNTs also shows superior cycling stability with only 3.7% capacitance drop after 5000 cycles. The enhanced electrochemical performance of the MnO2/HMCNTs makes them a promising electrode material for application in supercapacitors and potentially other energy storage devices.
KeywordsSupercapacitors Facile MnO2/HMCNTs nanocomposite Electrochemical
This work was supported by Natural Science Foundation of China (Grant Nos. 21274092, 91441205), and Shanghai Science & Technology Committee (Grant No. 10ZR1416100).
- 3.Y. Zhou, R. Ma, S.L. Candelaria, J. Wang, Q. Liu, E. Uchaker, P. Li, Y. Chen, G. Cao, Phosphorus/sulfur Co-doped porous carbon with enhanced specific capacitance for supercapacitor and improved catalytic activity for oxygen reduction reaction. J. Power Sources 314, 39–48 (2016)CrossRefGoogle Scholar
- 10.A.K. Das, S.K. Karan, B.B. Khatua, High energy density ternary composite electrode material based on polyaniline (PANI), molybdenum trioxide (MoO3) and graphene nanoplatelets (GNP) prepared by sono-chemical method and their synergistic contributions in superior supercapacitive performance. Electrochim. Acta 180, 1–15 (2015)CrossRefGoogle Scholar