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Issue 28, 2019
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Renewable flexible supercapacitors based on all-lignin-based hydrogel electrolytes and nanofiber electrodes

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Abstract

In the quest for renewable and highly efficient energy storage devices, all-lignin-based flexible supercapacitors are fabricated by integrating chemically cross-linked lignin hydrogel electrolytes with electrospun lignin/polyacrylonitrile nanofiber electrodes. The cross-linked networks of lignin-based hydrogel electrolytes show high ionic conductivity and mechanical integrity, whereas the free-standing flexible composite electrode achieves outstanding charge storage capability and kinetics arising from interconnected porous channels. The resulting devices demonstrate a high capacitance of 129.23 F g−1 and capacitance retention of 95% over 10 000 cycles as well as flexibility and durability under diverse bending angles. Moreover, these renewable flexible supercapacitors deliver a maximum energy and power density of 4.49 W h kg−1 and 2.63 kW kg−1, respectively.

Graphical abstract: Renewable flexible supercapacitors based on all-lignin-based hydrogel electrolytes and nanofiber electrodes

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Supplementary files

Article information


Submitted
03 Apr 2019
Accepted
16 Jun 2019
First published
18 Jun 2019

J. Mater. Chem. A, 2019,7, 16962-16968
Article type
Paper

Renewable flexible supercapacitors based on all-lignin-based hydrogel electrolytes and nanofiber electrodes

J. H. Park, H. H. Rana, J. Y. Lee and H. S. Park, J. Mater. Chem. A, 2019, 7, 16962
DOI: 10.1039/C9TA03519B

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