Highly Porous Willow Wood-Derived Activated Carbon for High-Performance Supercapacitor Electrodes
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2019-11-05
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en
Pages
10
18108-18117
18108-18117
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ACS Omega, Volume 4, issue 19
Abstract
In this study, we present willow wood as a new low-cost, renewable, and sustainable biomass source for the production of a highly porous activated carbon for application in energy storage devices. The obtained activated carbon showed favorable features required for excellent electrochemical performance such as high surface area (∼2 800 m2 g-1) and pore volume (1.45 cm3 g-1), with coexistence of micropores and mesopores. This carbon material was tested as an electrode for supercapacitor application and showed a high specific capacitance of 394 F g-1 at a current density of 1 A g-1 and good cycling stability, retaining ∼94% capacitance after 5000 cycles (at a current density of 5 A g-1) in 6 M KOH electrolyte. The prepared carbon material also showed an excellent rate performance in a symmetrical two-electrode full cell configuration using 1 M Na2SO4 electrolyte, in a high working voltage of 1.8 V. The maximum energy density and power density of the fabricated symmetric cell reach 23 W h kg-1 and 10 000 W kg-1, respectively. These results demonstrate that willow wood can serve as a low-cost carbon feedstock for production of high-performance electrode material for supercapacitors.Description
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Phiri, J, Dou, J, Vuorinen, T, Gane, P A C & Maloney, T C 2019, ' Highly Porous Willow Wood-Derived Activated Carbon for High-Performance Supercapacitor Electrodes ', ACS Omega, vol. 4, no. 19, pp. 18108-18117 . https://doi.org/10.1021/acsomega.9b01977
