Pyrolytic cyanobacteria derived activated carbon as high performance electrode in symmetric supercapacitor

Keliang Wang, Yuhe Cao, Xiaomin Wang, Qihua Fan, William Gibbons, Tylor Johnson, Bing Luo and Zhengrong Gu

Energy, 2016, vol. 94, issue C, 666-671

Abstract: Cyanobacteria, as a renewable source of carbon, was used to prepare activated carbon electrodes in supercapacitors. The activation includes a pre-carbonization at 400 °C followed by KOH heat treatment at 800 °C, leading to efficient and high degree of graphitization. The activated carbon electrode consisted primarily of carbon and oxygen, and possessed a large specific surface area of 2184 m2 g−1, with pore size centered at 27 nm. In 6 mol L−1 KOH electrolyte, the electrode exhibited superior specific capacitance of 271 F g−1 and 222 F g−1 at a charge/discharge current density of 0.1 A g−1 and 5.0 A g−1, respectively. The results demonstrated that the activated carbon derived from cyanobacteria can serve as promising electrode material for electrical double-layer capacitors.

Keywords: Cyanobacteria; Pyrolysis; Supercapacitor (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:94:y:2016:i:c:p:666-671

DOI: 10.1016/j.energy.2015.10.047

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