Cellulose-derived carbon aerogels: A novel porous platform for supercapacitor electrodes

With the coming of the green chemistry era, the tunable porosity and superb environmental friendliness accompanied by outstanding electrical conductivity of cellulose-derived carbon aerogels (CDCAs) have remarkably promoted the development of high-performance green supercapacitor electrodes. In this review, a detailed overview on the preparation strategies of CDCAs and their precursors (regenerated cellulose aerogels and nanofibrillated cellulose aerogels) are presented. Two crucial approaches for the improvement of energy storage ability, i.e., hetero-atom doping and integration with pseudocapacitive materials, are summarized. Moreover, the role of CDCAs in the energy storage ability is analyzed from the view of structure-response relationship. A comprehensive overview of the fundamental aspects related to the configuration and energy storage mechanism of supercapacitors and the synthesis, structure, and property of cellulose is provided. Finally, this review presents a brief summary, challenges, and perspectives of CDCA-based supercapacitor electrodes and devices. (c) 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/).

Automated summary

This review provides a detailed overview of cellulose-derived carbon aerogels (CDCAs) and their precursors in the field of high-performance green supercapacitor electrodes. The preparation strategies of CDCAs and their precursors are presented, and two crucial approaches for improving energy storage ability, hetero-atom doping and integration with pseudocapacitive materials, are summarized. The role of CDCAs in energy storage ability is analyzed from the perspective of structure-response relationship.