Biochar activated by oxygen plasma for supercapacitors

Biochar, also known as black carbon, is a byproduct of biomass pyrolysis. As a low-cost, environmental-friendly material, biochar has the potential to replace more expensive synthesized carbon nanomaterials (e.g. carbon nanotubes) for use in future supercapacitors. To achieve high capacitance, bioch...

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Bibliographic Details
Published in:Journal of power sources 2015-01, Vol.274 (C), p.1300-1305
Main Authors: Gupta, Rakesh Kumar, Dubey, Mukul, Kharel, Parashu, Gu, Zhengrong, Fan, Qi Hua
Format: Article
Language:English
Subjects:
Activation
Capacitance
Capacitors
Carbon
Charge
Energy consumption
Microstructure
Oxygen plasma
Supercapacitors
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Summary:Biochar, also known as black carbon, is a byproduct of biomass pyrolysis. As a low-cost, environmental-friendly material, biochar has the potential to replace more expensive synthesized carbon nanomaterials (e.g. carbon nanotubes) for use in future supercapacitors. To achieve high capacitance, biochar requires proper activation. A conventional approach involves mixing biochar with a strong base and baking at a high temperature. However, this process is time consuming and energy inefficient (requiring temperatures >900 [degrees]C). This work demonstrates a low-temperature (
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2014.10.169