The Impact of Surface Chemistry on Bio-derived Carbon Performance as Supercapacitor Electrodes

Abstract
In this study, we demonstrate that highly functionalized and porous carbons can be derived from palm-leaf waste using the template-free facile synthesis process. The derived carbons have high content of nitrogen dopant, high surface area, and various defects. Moreover, these carbons exhibit a high electrical conductivity (107 S m−1). Thanks to the high content of edge N (64.3%) and highly microporous nature (82% of microspores), these biomass-derived carbons show promising performance when used as supercapacitor electrodes. To be specific, these carbonaceous materials show a specific capacitance as high as 197 and 135 F g−1 at 2 and 20 A g−1 in three-electrode configuration, respectively. Furthermore, the symmetrical cells using palm-leaf-derived carbon show an energy density of 8.4 Wh Kg−1 at a power density of 0.64 kW Kg−1, with high cycling life stability (∼8% loss after 10,000 continuous charge–discharge cycles at 20 A g−1). Interestingly, as the power density increases from 4.4 kW kg−1 to 36.8 kW kg−1, the energy density drops slowly from 8.4 Wh kg−1 to 3.4 Wh kg−1. Getting such extremely high power density without significant loss of energy density indicates that these palm-leaf-derived carbons have excellent electrode performance as supercapacitor electrodes.

Citation
Alshareef NH, Whitehair D, Xia C (2016) The Impact of Surface Chemistry on Bio-derived Carbon Performance as Supercapacitor Electrodes. Journal of Electronic Materials. Available: http://dx.doi.org/10.1007/s11664-016-5206-x.

Acknowledgements
Research reported in this publication has been supported by King Abdullah University of Science and Technology (KAUST). NHA would like to thank the KAUST High School staff, particularly Dr. Christos N. Hadjichristidis for several useful discus- sions, and Ms. Edwige Thivin-Boutry for her kind advice throughout the personal project research.

Publisher
Springer Nature

Journal
Journal of Electronic Materials

DOI
10.1007/s11664-016-5206-x

Additional Links
http://link.springer.com/article/10.1007%2Fs11664-016-5206-x

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