Green self-assembly synthesis of porous lignin-derived carbon quasi-nanosheets for high-performance supercapacitors

Fangbao Fu, Dongjie Yang, Wenli Zhang, Wenli Zhang, Xueqing Qiu

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133 Scopus citations


Two-dimensional porous carbon materials are very promising for energy storage/conversion due to their unique microstructure, reasonable pore structure and excellent electrochemical properties. A green and facile in-situ carbonization technique is innovated to prepare a unique porous lignin-derived carbon quasi-nanosheets (PLC) with rational pore distribution, large surface area, and excellent conductivity. The lignosulfonate/zinc oxalate composite was firstly self-assembled by hydrophobic bond of the amphiphilic structure in lignosulfonate using ethanol/water solvent without the need to use any toxic material, followed by co-pyrolysis at a high temperature with gas-exfoliation and in-situ templating of zinc oxalate. The resulting PLC exhibits a very high specific capacitance of 320 F/g at 1.0 A/g and long cycling stability (remains 93.5% after 10,000 cycles at 5.0 A/g). In addition, when assembling into symmetric supercapacitors in PVA/KOH gel electrolytes, PLC also shows a high specific capacitance of 274 F/g at 0.5 A/g with excellent rate capability and a high specific energy density (9.75 W h/kg at 6157.9 W/kg). These excellent electrochemical performances indicate that the as-prepared PLC should hold great promise for the energy storage devices, opening a new path for the preparation of advanced carbon electrode material and high-value-added utilization of biomass.
Original languageEnglish (US)
Pages (from-to)123721
JournalChemical Engineering Journal
StatePublished - Dec 6 2019

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The authors would like to acknowledge the National Key Research and Development Program of China (2018YFB1501503), the National Natural Science Foundation of China (NSFC) (No. 21878114, 21690083, 21908071), and Natural Science Foundation of Guangdong Province (2018B030311052, 2017B090903003). Fu F. B. and Yang D. J. have contributed equally to this work.


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