High-volumetric-capacitance graphene supercapacitors via DEGDE-mediated GO clay process
6 affiliations
- 1College of Intelligent Systems Science and Engineering, Hubei Minzu University, Enshi, China
- 2Materials Science and Engineering, Wuhan Institute of Technology, Wuhan, China
- 3School of Chemistry and Environmental Engineering, Hubei Minzu University, Enshi, China
- 4Jianli High School, Jianli, China
- 5Wuhan Wansu Chemical Co., Ltd, Wuhan, China
- 6Key Laboratory of Green Manufacturing of Super-Light Elastomer Materials of State Ethnic Affairs Commission, Hubei Minzu University, Enshi, China
Abstract
A refined and facile strategy is reported for preparing high-volumetric-capacitance graphene supercapacitor electrodes via a diethylene glycol dimethyl ether (DEGDE)-mediated graphene oxide (GO) clay process. Building upon the GO “pottery” concept from our previous work, this method addresses the critical limitation of solvent evaporation and loss of workability by employing DEGDE—a high-boiling-point, high-molecular-weight organic solvent—as a processing aid. This modification preserves the plasticity and uniformity of the GO clay during calendering and thermal reduction, enabling the direct production of dense, self-supporting reduced graphene oxide (rGO) electrode sheets without binders, conductive additives, or extensive purification. The resulting rGO electrodes exhibit a well-defined layered graphene architecture with high packing density. In a symmetric two-electrode configuration with 5 M KOH electrolyte, the electrode delivers a gravimetric specific capacitance of 119.4 ± 4.4 F g‒1 and a volumetric specific capacitance of 84.0 ± 3.1 F cm‒3 at 1 mA cm‒2, with stable performance across varying currents and excellent reproducibility. This work provides a practical and cost-effective route for high-density graphene electrodes with competitive volumetric performance for compact energy storage applications.
Related
- Mechanically Robust and Highly Conductive Cellulose Nanopaper Electrodes Enabled by Polyaniline-Graphene Hybrid Networks for Flexible Supercapacitors
- Chitosan-poly(ethylene glycol)-NaClO4 solid polymer electrolytes for activated carbon and flexible laser-induced graphene-based all-solid-state supercapacitors
- Iodide-Mediated Charge Storage in Deep Eutectic Solvent Electrolytes for Nontoxic Printed Supercapacitors.
- Study of the Graphene Oxide Reduction Reaction Kinetics: Modeling and Electrical Monitoring of the Process
- Graphene Field-Effect Transistor Process and Analysis Optimization in 200 mm Pilot-Line Environment.
BibTeX
@article{wu2026highvolumetriccapacitance,
title = {{High-volumetric-capacitance graphene supercapacitors via DEGDE-mediated GO clay process}},
author = {Jiawen Wu and Dingtao Cheng and Qiuyan Li and Zhihong Wang and Zhou Li and Yuanyuan Li and Yingru Li},
journal = {Frontiers in Chemistry},
year = {2026},
month = oct,
doi = {10.3389/fchem.2026.1966349},
url = {https://doi.org/10.3389/fchem.2026.1966349},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - High-volumetric-capacitance graphene supercapacitors via DEGDE-mediated GO clay process
AU - Jiawen Wu
AU - Dingtao Cheng
AU - Qiuyan Li
AU - Zhihong Wang
AU - Zhou Li
AU - Yuanyuan Li
AU - Yingru Li
PY - 2026
DA - 2026/10/12
JO - Frontiers in Chemistry
DO - 10.3389/fchem.2026.1966349
UR - https://doi.org/10.3389/fchem.2026.1966349
AB - A refined and facile strategy is reported for preparing high-volumetric-capacitance graphene supercapacitor electrodes via a diethylene glycol dimethyl ether (DEGDE)-mediated graphene oxide (GO) clay process. Building upon the GO “pottery” concept from our previous work, this method addresses the critical limitation of solvent evaporation and loss of workability by employing DEGDE—a high-boiling-point, high-molecular-weight organic solvent—as a processing aid. This modification preserves the plasticity and uniformity of the GO clay during calendering and thermal reduction, enabling the direct production of dense, self-supporting reduced graphene oxide (rGO) electrode sheets without binders, conductive additives, or extensive purification. The resulting rGO electrodes exhibit a well-defined layered graphene architecture with high packing density. In a symmetric two-electrode configuration with 5 M KOH electrolyte, the electrode delivers a gravimetric specific capacitance of 119.4 ± 4.4 F g‒1 and a volumetric specific capacitance of 84.0 ± 3.1 F cm‒3 at 1 mA cm‒2, with stable performance across varying currents and excellent reproducibility. This work provides a practical and cost-effective route for high-density graphene electrodes with competitive volumetric performance for compact energy storage applications.
SN - 2296-2646
ER -