TY - JOUR
AU1 - Mao, Lu
AU2 - Zhang, Yu
AU3 - Hu, Yating
AU4 - Ho, Kuan Hung
AU5 - Ke, Qingqing
AU6 - Liu, Huajun
AU7 - Hu, Zhigang
AU8 - Zhao, Dan
AU9 - Wang, John
AB - Mesoporous carbons were prepared from carbon spheres derived from hydrothermal carbonization of sucrose, followed by KOH activation. The porous structure was tuned by adjusting the ratio of KOH to sucrose-derived carbon spheres. Activated carbons exhibited bi-modal pore size distribution consisting of both micropores and mesopores within 1–5 nm in size, and high surface areas up to 2823 m2 g−1 can be achieved. The activated porous carbons derived from an optimal KOH/carbon weight ratio of 2.5 demonstrated the highest specific capacitance of 316 F g−1 with excellent high-rate performance and good cycling stability. A high power density of 151.8 kW kg−1 with a reasonable energy density of 10.7 W h kg−1 in 6 M KOH aqueous electrolyte could be achieved. Similarly, a high energy density of 32.8 W h kg−1 at a decent power density of 52.5 kW kg−1 in organic electrolyte can be realized, attributed to the high surface area and micro/mesoporous structure. The current study provides a simple, low cost and effective method for the preparation of electrode materials for supercapacitors from biomass.
TI - Activation of sucrose-derived carbon spheres for high-performance supercapacitor electrodes
JF - RSC Advances
DO - 10.1039/c4ra11028e
DA - 2015-01-07
UR - https://www.deepdyve.com/lp/royal-society-of-chemistry/activation-of-sucrose-derived-carbon-spheres-for-high-performance-piGGG3R0bZ
SP - 9307
EP - 9313
VL - 5
IS - 12
DP - DeepDyve
ER -