Waste-Wood-Isolated Cellulose-Based Activated Carbon Paper Electrodes with Graphene Nanoplatelets for Flexible Supercapacitors

Waste wood, which has a large amount of cellulose fibers, should be transformed into useful materials for addressing environmental and resource problems. Thus, this study analyzed the application of waste wood as supercapacitor electrode material. First, cellulose fibers were extracted from waste wo...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2023-11, Vol.28 (23), p.7822
Main Authors: Lee, Jung Jae, Chae, Su-Hyeong, Lee, Jae Jun, Lee, Min Sang, Yoon, Wonhyung, Kwac, Lee Ku, Kim, Hong Gun, Shin, Hye Kyoung
Format: Article
Language:English
Subjects:
Activated carbon
activated carbon paper
Adsorption
Batteries
Capacitors
Carbon fibers
Cellulose
cellulose fiber
Cellulose fibers
Computer storage devices
Electrochemistry
electrode
Electrodes
Electrolytes
Energy consumption
Energy storage
Environmental impact
Graphene
graphene nanoplatelet
Graphite
Lignin
Morphology
Pore size
Porous materials
Rice
Scanning electron microscopy
supercapacitor
waste wood
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Summary:Waste wood, which has a large amount of cellulose fibers, should be transformed into useful materials for addressing environmental and resource problems. Thus, this study analyzed the application of waste wood as supercapacitor electrode material. First, cellulose fibers were extracted from waste wood and mixed with different contents of graphene nanoplatelets (GnPs) in water. Using a facile filtration method, cellulose papers with GnPs were prepared and converted into carbon papers through carbonization and then to porous activated carbon papers containing GnPs (ACP-GnP) through chemical activation processes. For the morphology of ACP-GnP, activated carbon fibers with abundant pores were formed. The increase in the amount of GnPs attached to the fiber surfaces decreased the number of pores. The Brunauer-Emmett-Teller surface areas and specific capacitance of the ACP-GnP electrodes decreased with an increase in the GnP content. However, the galvanostatic charge-discharge curves of ACPs with higher GnP contents gradually changed into triangular and linear shapes, which are associated with the capacitive performance. For example, ACP with 15 wt% GnP had a low mass transfer resistance and high charge delivery of ions, resulting in the specific capacitance value of 267 Fg owing to micropore and mesopore formation during the activation of carbon paper.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules28237822