Waste materials as precursors for supercapacitor electrodes

Rufford, T., Jurcakova, D., Fiset, E., Zhu, Z. and Lu, G. Q. (2009). Waste materials as precursors for supercapacitor electrodes. In: Engineering our future: Are we up to the challenge. CHEMECA 2009, Perth, Australia, (1-11). 27-30 September.

Author Rufford, T.
Jurcakova, D.
Fiset, E.
Zhu, Z.
Lu, G. Q.
Title of paper Waste materials as precursors for supercapacitor electrodes
Conference name CHEMECA 2009
Conference location Perth, Australia
Conference dates 27-30 September
Convener Heyns, T.
Proceedings title Engineering our future: Are we up to the challenge
Place of Publication Perth
Publisher Engineers Australia
Publication Year 2009
Year available 2009
Sub-type Fully published paper
Start page 1
End page 11
Collection year 2010
Language eng
Abstract/Summary This work highlights the potential to use waste biomass to produce electrodes for cost-effective energy storage systems based on renewable resources. Porous carbon electrodes for supercapacitors were prepared from waste coffee grounds, sugar cane bagasse, pine wood sawdust, and sucrose by activation with ZnCl2. The double-layer capacitances of these carbon electrodes were evaluated in two-electrode supercapacitor cells with 1 M H2SO4. The choice of carbon precursor and activation conditions determine the electrochemical performance, with surface area, pore size distribution, electrical conductivity, and electrochemically active surface functional groups all affecting specific capacitance. The activated carbons from sucrose, pinewood and coffee grounds all exhibited good electrochemical capacitance and stable cycling performance in H2SO4. The activated carbon from coffee grounds achieved the highest specific capacitances at low current loads, with capacitances as high as 368 F g-1 in H2SO4. The good electrochemical performance of the carbons from sucrose, pinewood and coffee grounds is predominantly attributed to well developed pore structures. Although the bagasse carbon has a surface area of 1155 m2 g-1, the bagasse carbons achieved lower specific capacitance and poor stability due to residue silica and ash content.
Subjects E1
850602 Energy Storage (excl. Hydrogen)
829805 Management of Water Consumption by Plant Production
Keyword Waste materials, Supercapacitor Electrodes
Q-Index Code E1
Q-Index Status Confirmed Code

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Created: Fri, 12 Mar 2010, 16:14:30 EST by Vicki Thompson on behalf of School of Chemical Engineering