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, Zhengrong Gu

    Research output: Contribution to journalArticlepeer-review

    29 Scopus citations


    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.

    Original languageEnglish (US)
    Pages (from-to)666-671
    Number of pages6
    StatePublished - Jan 1 2016

    Bibliographical note

    Funding Information:
    This research was funded by USDA-NIFA Agriculture and Food Research Initiative Sustainable Bioenergy Program ( 2011-67009-20030 ) NSF EpsCor Track II Dakota BioCon center and was also partly supported by NSF award #1462389 .

    Publisher Copyright:
    © 2015 Elsevier Ltd.


    • Cyanobacteria
    • Pyrolysis
    • Supercapacitor


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