Next Article in Journal
Correction: G. Papari et al. Terahertz Spectroscopy of Amorphous WSe2 and MoSe2 Thin Films. Materials 2018, 11, 1613
Previous Article in Journal
Strength Development and Elemental Distribution of Dolomite/Fly Ash Geopolymer Composite under Elevated Temperature
Open AccessArticle

Willow Bark for Sustainable Energy Storage Systems

1
Institute of Paper, Pulp and Fibre Technology, Graz University of Technology, Inffeldgasse 23, 8010 Graz, Austria
2
Department of Bioproducts and Biosystems, Aalto University, Vuorimiehentie 1, 02150 Espoo, Finland
3
Institute for Chemistry and Technology of Materials, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(4), 1016; https://doi.org/10.3390/ma13041016
Received: 10 December 2019 / Revised: 4 February 2020 / Accepted: 11 February 2020 / Published: 24 February 2020
(This article belongs to the Section Biomaterials)
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. View Full-Text
Keywords: willow bark; upcycling; carbon activation; electrode formation; supercapacitors; organic electrolytes willow bark; upcycling; carbon activation; electrode formation; supercapacitors; organic electrolytes
Show Figures

Graphical abstract

MDPI and ACS Style

Hobisch, M.A.; Phiri, J.; Dou, J.; Gane, P.; Vuorinen, T.; Bauer, W.; Prehal, C.; Maloney, T.; Spirk, S. Willow Bark for Sustainable Energy Storage Systems. Materials 2020, 13, 1016.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop