Citation: LI Dao-Yan, ZHANG Ji-Chen, WANG Zhi-Yong, JIN Xian-Bo. Preparation of Activated Carbon from Honeycomb-Like Porous Gelatin for High-Performance Supercapacitors[J]. Acta Physico-Chimica Sinica, ;2017, 33(11): 2245-2252. doi: 10.3866/PKU.WHXB201705241 shu

Preparation of Activated Carbon from Honeycomb-Like Porous Gelatin for High-Performance Supercapacitors

College of Chemistry and Molecular Sciences, Hubei Key Laboratory of Electrochemical Power Sources, Wuhan University, Wuhan 430072, P. R. China

Received Date: 27 March 2017
Revised Date: 15 May 2017

Fund Project: The project was supported by the National Natural Science Foundation of China (21673164).

Recently, preparation of carbon materials using biomass as precursors has received much attention owning to their merits of low cost, abundance, renewability, and environmental benignity. In this study, honeycomb-like porous gelatin was synthesized and subsequently used as the precursor to prepare activated carbon through carbonization followed by activation. The prepared activated carbon had a higher specific surface area (up to 3692 m²·g^-1) and supercapacitor performance than that of activated carbon derived from commercial gelatin. In a 6 mol·L^-1 KOH solution, the activated carbon prepared from porous gelatin through 600℃ carbonization and 700℃ activation delivered high specific capacitances of 357 and 227 F·g^-1 at current densities of 1 and 100 A·g^-1, respectively. In addition, after 7500 charge/discharge cycles at a current density of 10 A·g^-1, it showed 93.0% retention of the initial capacitance, demonstrating excellent cycling stability. Moreover, a symmetric supercapacitor was assembled, which delivered an energy density of 10.3, 9.7, and 8.2 Wh·kg^-1 at power densities of 250, 2500, and 25000 W·kg^-1, respectively. Furthermore, a capacity retention as high as 97.6% was achieved after 10000 cycles at 10 A·g^-1 using this symmetric supercapacitor. This work has demonstrated that the activated carbon derived from honeycomb-like porous gelatin has great potential for application in high-performance supercapacitors.
- Porous gelatin,
- Honeycomb-like,
- Activated carbon,
- Supercapacitor
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