Highly stable performance of supercapacitors from phosphorus-enriched carbons.
Phosphorus-rich microporous carbons (P-carbons) prepared by a simple H(3)PO(4) activation of three different carbon precursors exhibit enhanced supercapacitive performance in 1 M H(2)SO(4) when highly stable performance can be achieved at potentials larger than the theoretical decomposition potential of water. This ability of P-carbons greatly enhances the energy density of supercapacitors that are capable of delivering 16 Wh/kg compared to 5 Wh/kg for the commercial carbon. An intercept-free multiple linear regression model confirms the strongest influence of phosphorus on capacitance together with micropores 0.65-0.83 nm in width that are the most effective in forming the electric double layer.
Hulicova-Jurcakova
Denisa
D
The University of Queensland, ARC Centre of Excellence for Functional Nanomaterials, School of Engineering and Australian Institute for Bioengineering and Nanotechnology, 4072 Queensland, Australia. d.jurcakova@uq.edu.au
Puziy
Alexander M
AM
Poddubnaya
Olga I
OI
Suárez-García
Fabian
F
Tascón
Juan M D
JM
Lu
Gao Qing
GQ