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Preparation and Capacitive Performance of Graphene/Nanocellulose Composite Conductive Paper
Received:May 07, 2024  
DOI：10.11980/j.issn.0254-508X.2024.08.013
Key Words:graphene  nanocellulose  flexible electrode  supercapacitor
Fund Project:河北省高等学校科学技术研究项目（Z2019098）；河北机电职业技术学院教科研规划项目自然重点项目（ZD22003）。
Author NameAffiliationPostcode
ZHANG Changjun Hebei Institute of Mechanical and Electrical Technology， Xingtai， Hebei Province， 054000
Hebei Province Electromechanical Equipment Intelligent Perception and Advanced Control Technology Innovation Center， Xingtai， Hebei Province， 054000 		054000
GAO Jian Hebei Institute of Mechanical and Electrical Technology， Xingtai， Hebei Province， 054000 054000
LI Guanhui School of Electronic and Information Engineering， South China University of Technology， Guangzhou， Guangdong Province， 510640 510640
YANG Hui* Institute of Semiconductors， Guangdong Academy of Sciences， Guangzhou， Guangdong Province， 510650 510650
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Abstract:In this study， taking carbon sphere （GS） as the intercalating agent， reduced graphene oxide （rGO） as conductive matrix， and cellulose nanofibril （CNF） as green and flexible substrate， the graphene/cellulose nanofiber composite conductive paper （rGO/GS/CNF） with sandwich structure was prepared and the effects of adding GS and CNF on rGO/GS/CNF were explored. The results showed that compared with pure graphene conductive paper， the presence of CNF and GS could change the microstructure of the composite paper， giving rGO/GS/CNF better mechanical strength （53.7 MPa）， and the embedding of GS could also increase the interlayer distance of rGO， effectively improving the multiplicity and capacitive performance of rGO/GS/CNF. At the current density of 0.5 mA/cm2， the area specific capacitance of the rGO/GS/CNF electrode was 227.8 mF/cm2， and the capacitance retention rate was 82.1% after 1 000 charge-discharge cycles， with exhibiting large energy density （62.0 μWh/cm2）， and power density （2 080 μW/cm2）， which indicated good application potential in the field of flexible supercapacitors.
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