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Paper Supercapacitor Developed Using a Manganese Dioxide/Carbon Black Composite and a Water Hyacinth Cellulose Nanofiber-Based Bilayer Separator

Beg, Mustehsan; Alcock, Keith M.; Titus Mavelil, Achu; O’Rourke, Dominic; Sun, Dongyang; Goh, Keng; Manjakkal, Libu; Yu, Hongnian

Authors

Achu Titus Mavelil

Dominic O’Rourke



Abstract

Flexible and green energy storage devices have a wide range of applications in prospective electronics and connected devices. In this study, a new eco-friendly bilayer separator and primary and secondary paper supercapacitors based on manganese dioxide (MnO2)/carbon black (CB) are developed. The bilayer separator is prepared via a two-step fabrication process involving freeze–thawing and nonsolvent-induced phase separation. The prepared bilayer separator exhibits superior porosity of 46%, wettability of 46.5°, and electrolyte uptake of 194% when compared with a Celgard 2320 trilayer separator (39%, 55.58°, and 110%). Moreover, lower bulk resistance yields a higher ionic conductivity of 0.52 mS cm–1 in comparison to 0.22 mS cm–1 for the Celgard separator. Furthermore, the bilayer separator exhibits improved mean efficiency of 0.44% and higher specific discharge capacitance of 13.53%. The anodic and cathodic electrodes are coated on a paper substrate using MnO2/CB and zinc metal-loaded CB composites. The paper supercapacitor demonstrates a high specific capacitance of 34.1 mF cm–2 and energy and power density of 1.70 μWh cm–2 and 204.8 μW cm–2 at 500 μA, respectively. In summary, the concept of an eco-friendly bilayer cellulose separator with paper-based supercapacitors offers an environmentally friendly alternative to traditional energy storage devices.

Journal Article Type Article
Acceptance Date Oct 15, 2023
Online Publication Date Oct 28, 2023
Publication Date 2023-10
Deposit Date Nov 4, 2023
Publicly Available Date Nov 7, 2023
Journal ACS Applied Materials & Interfaces
Print ISSN 1944-8244
Electronic ISSN 1944-8252
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 15
Issue 44
Pages 51100-51109
DOI https://doi.org/10.1021/acsami.3c11005
Keywords eco-friendly, cellulose, separator, supercapacitor, paper energy storage, flexible
Public URL http://researchrepository.napier.ac.uk/Output/3367797

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