Willow bark for sustainable energy storage systems

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2020-02-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
Materials, Volume 13, issue 4
Abstract
Willow bark is a byproduct from forestry and is obtained at an industrial scale. We upcycled this byproduct in a two-step procedure into sustainable electrode materials for symmetrical supercapacitors using organic electrolytes. The procedure employed precarbonization followed by carbonization using different types of KOH activation protocols. The obtained electrode materials had a hierarchically organized pore structure and featured a high specific surface area (>2500 m2 g-1) and pore volume (up to 1.48 cm3 g-1). The assembled supercapacitors exhibited capacitances up to 147 F g-1 in organic electrolytes concomitant with excellent cycling performance over 10,000 cycles at 0.6 A g-1 using coin cells. The best materials exhibited a capacity retention of 75% when changing scan rates from 2 to 100 mV s-1.
Description
Keywords
carbon activation, electrode formation, organic electrolytes, supercapacitors, upcycling, willow bark
Other note
Citation
Hobisch, M A, Phiri, J, Dou, J, Gane, P, Vuorinen, T, Bauer, W, Prehal, C, Maloney, T & Spirk, S 2020, ' Willow bark for sustainable energy storage systems ', Materials, vol. 13, no. 4, 1016 . https://doi.org/10.3390/ma13041016