Pumpkin-Derived Porous Carbon for Supercapacitors with High Performance
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- 作者：Suying Bai ; Dr. Guangqun Tan ; Dr. Xiaoqin Li ; Dr. Qian Zhao ; Yan Meng ; Yujue Wang ; Dr. Yongzhi Zhang and Prof. Dan Xiao
- 刊名：Chemistry – An Asian Journal
- 出版年：2016
- 出版时间：June 21, 2016
- 年：2016
- 卷：11
- 期：12
- 页码：1828-1836
- 全文大小：2010K
- ISSN：1861-471X
文摘
Pumpkin has been employed for the first time as a renewable, low-cost precursor for the preparation of porous carbon materials with excellent performance. Unlike most other precursors, pumpkin is rich in sugars and starch, and it has advantageous properties for large-scale production. The as-prepared materials adopted a unique morphology that consisted of numerous fused sphere-like carbon grains with a high specific surface area (2968 m2 g−1), abundant micro and mesopores, and excellent electrochemical properties. The pumpkin-derived activated carbon (PAC) material not only exhibited a high specific capacitance of 419 F g−1, but also showed considerable cycling stability, with 93.6 % retention after 10 000 cycles. Moreover, a symmetrical supercapacitor that was based on PAC showed a high energy density of 22.1 W h kg−1 in aqueous electrolyte. These superior properties demonstrate that PAC holds great promise for applications in electrochemical energy-storage devices.