Issue 2, 2021

Ultralight and robust carbon nanofiber aerogels for advanced energy storage

Abstract

Currently, it still remains a grand challenge to simultaneously enhance the mechanical and electrochemical properties of carbon materials for advanced energy storage and conversion. Herein, we reported the exploration of a carbon nanofiber aerogel with a unique spider-web-like 3D network structure based on the welding effect rather than interfibrous entanglements, via the carbonization of bacterial cellulose (BC) nanofibers assisted by surface carboxylation treatment. The as-prepared carbon aerogel had an ultralow density of ∼2.7 mg cm−3, and exhibited high flexibility (ε > 90%) and robust repetitive compressive duration (only a 3% decrease after 100 cycles at ε = 90%). Moreover, it showed a specific capacitance of 268 F g−1 at 0.5 A g−1, which was among the best values of self-supporting carbon materials ever reported. The as-constructed solid-state supercapacitors (SSSCs) achieved a specific capacitance of 104 F g−1 at 0.5 A g−1 with excellent rate performance and cycling stability, which were much higher than those of most carbon-based SSSCs ever reported. More interestingly, such SSSCs showed great potential to be applied as flexible energy storage devices.

Graphical abstract: Ultralight and robust carbon nanofiber aerogels for advanced energy storage

Supplementary files

Article information

Article type
Communication
Submitted
26 Sep 2020
Accepted
07 Dec 2020
First published
09 Dec 2020

J. Mater. Chem. A, 2021,9, 900-907

Ultralight and robust carbon nanofiber aerogels for advanced energy storage

Y. Ma, Q. Liu, W. Li, Y. Zheng, Q. Shi, Z. Zhou, G. Shao, W. Yang, D. Chen and X. Fang, J. Mater. Chem. A, 2021, 9, 900 DOI: 10.1039/D0TA09466H

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