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Erschienen in: Cellulose 1/2022

18.11.2021 | Original Research

Scalable synthesis of γ-Fe2O3–based composite films as freestanding negative electrodes with ultra-high areal capacitances for high-performance asymmetric supercapacitors

verfasst von: Jincy Parayangattil Jyothibasu, Ruei-Hong Wang, Kenneth Ong, Juping Hillary Lin Ong, Rong-Ho Lee

Erschienen in: Cellulose | Ausgabe 1/2022

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Abstract

This paper reports a simple, cost-effective, and environmentally friendly procedure for the synthesis of cellulose/functionalized carbon nanotube (f-CNT)/Fe2O3 (CCF) composite films and their performance as freestanding negative electrodes in supercapacitors. A facile chemical precipitation process was performed at room temperature within a short reaction time without requiring any of the special processing conditions used in the conventional hydrothermal synthesis, making it the most cost-efficient method for the bulk-scale production of sustainable supercapacitors. The binder-free negative electrode with ultra-high active material loading exhibited outstanding areal (9107.1 mF cm–2) and volumetric (314 F cm–3) capacitances, which were much greater than the values reported previously in the literature for negative electrodes. Moreover, an asymmetric supercapacitor cell featuring cellulose/f-CNT/MnO2 (CCM) and CCF as its positive and negative electrodes, respectively, achieved superior electrochemical performances. Therefore, on account of the economic and environmental superiority of this method and its bulk scalability, this paper provides a simple, eco-friendly, and cost-effective approach for the development of sustainable supercapacitors for practical use.

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Metadaten
Titel
Scalable synthesis of γ-Fe2O3–based composite films as freestanding negative electrodes with ultra-high areal capacitances for high-performance asymmetric supercapacitors
verfasst von
Jincy Parayangattil Jyothibasu
Ruei-Hong Wang
Kenneth Ong
Juping Hillary Lin Ong
Rong-Ho Lee
Publikationsdatum
18.11.2021
Verlag
Springer Netherlands
Erschienen in
Cellulose / Ausgabe 1/2022
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-021-04298-4

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