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Black Charcoal for Green and Scalable Wooden Electrodes for Supercapabatteries
Author(s) -
Liu Lianlian,
Masich Sergej,
Björk Emma M.,
Solin Niclas,
Inganäs Olle
Publication year - 2022
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202101072
Subject(s) - charcoal , electrode , carbon black , materials science , cyclic voltammetry , carbon fibers , graphite , adsorption , electrochemistry , capacitance , composite material , chemical engineering , chemistry , metallurgy , organic chemistry , composite number , engineering , natural rubber
A green, though black, sustainable and low‐cost carbon material—charcoal produced from wood—is developed for electricity storage. Charcoal electrodes are fabricated by ball‐milling charcoal and adding protein nanofibril binders. The charcoal electrode presents a capacitance of 360 F g −1 and a conductivity of 0.2 S m −1 . A pair of redox peaks is observed in the cyclic voltammetry and assigned to originate from quinone groups. Compared with other wooden electrodes, these charcoal electrodes display better cycling stability with 88% capacity retention after 1000 cycles. Their discharge capacity is 2.5 times that of lignosulfonate/graphite hybrid electrodes.