Multifunction web-like polymeric network bacterial cellulose derived from SCOBY as both electrodes and electrolytes for pliable and low-cost supercapacitor
Document Type
Article
Publication Date
8-1-2022
Abstract
In this work, bacterial cellulose (BC)-based polymer derived from a symbiotic culture of bacteria and yeast (SCOBY) are optimized as both electrodes and electrolytes to fabricate a flexible and free-standing supercapacitor. BC is a multifunction and versatile polymer. Montmorillonite (MMT) and sodium bromide (NaBr) are used to improve mechanical strength and as the ionic source, respectively. From XRD analysis, it is found that the addition of MMT and NaBr has reduced the crystallinity of the electrolyte. Most interaction within the electrolyte happens in the region of the OH band, as verified using FTIR analysis. A maximum room temperature conductivity of (1.09 +/- 0.02) x 10(-3) S/cm is achieved with 30 wt.% NaBr. The highest conducting SCOBY-based electrolytes have a decompose voltage and ionic transference number of 1.48 V and 0.97, respectively. The multiwalled carbon nanotube is employed as the active material held by the fibrous network of BC. Cyclic voltammetry shows a rectangular shape CV plot with the absence of a redox peak. The supercapacitor is charged and discharged in a zig-zag-shaped Perspex plate for 1000 cycles with a decent performance.
Keywords
EDLC, Supercapacitor, Bacterial cellulose, Biopolymer, Green energy, Electrolyte
Divisions
PHYSICS
Funders
Centre for Research Management and Innovation, Universiti Pertahanan Nasional Malaysia (UPNM)
Publication Title
Polymers
Volume
14
Issue
15
Publisher
MDPI
Publisher Location
ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND