1. Construction of MnO2@NH4MnF3 core-shell nanorods for asymmetric supercapacitor.
- Author
-
Li, Bin, Zhang, Xihua, Dou, Jinhe, and Zhang, Pengxiang
- Subjects
- *
POWER density , *ENERGY density , *NANORODS , *CONSTRUCTION , *SUPERCAPACITOR electrodes , *CHEMICAL templates - Abstract
In this research, a facile method to produce the core-shell MnO 2 @NH 4 MnF 3 nanorods of 50–80 nm in diameter from the manganese silicate particles was introduced. The α-MnO 2 and NH 4 MnF 3 samples were synthesized and their electrochemical performances were also measured for comparison. TEM and EDS results show the ∼6 nm NH 4 MnF 3 shell is well coated on the α-MnO 2 core. This novel nanocomposite has less Mn(II) and more Mn(IV) content, better conductivity, as well as moderate capacitive contribution. Besides, the specific capacitance of MnO 2 @NH 4 MnF 3 nanorods reaches 240 F g−1 and could retain 98.0% of initial after 1000 cycles galvanostatic charge/discharge. The asymmetric supercapacitor AC//MnO 2 @NH 4 MnF 3 with 1.7 V working potential range has been fabricated. It performs an energy density of 11.2 Wh kg−1 at the power density of 10 kW kg−1. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF