Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1608363 | Journal of Alloys and Compounds | 2015 | 7 Pages |
Abstract
The boron-doped MnO2/carbon fiber composite electrode has been prepared via in situ redox reaction between potassium permanganate and carbon fibers in the presence of boric acid. The addition of boron as dopant results in the increase of growth-rate of MnO2 crystal and the formation of worm-like nanostructure. Based on the analysis of binding energy, element boron incorporates into the MnO2 lattice through interstitial mode. The doped electrode with porous framework is beneficial to pseudocapacitive reaction and surface charge storage, leading to higher specific capacitance and superior rate capability. After experienced 1000 cycles, the boron-doped MnO2 still retain a higher specific capacitance by about 80% of its initial value. The fall in capacitance is blamed to be the combination of the formation of soluble Mn2+ and the absence of active site on the outer surface.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Hong Zhong Chi, Hongjie Zhu, Linhui Gao,