The cost-effective fabrication of lightweight, safe, and solid-state supercapacitors with excellent performance, such as high energy and power densities and long cycle life, has recently become a critical issue in next-generation energy storage systems. As a result, current research efforts are focused on developing high-performance advanced electrode materials with high capacitance and outstanding stability, and solid electrolytes that provide flexibility and safety. Herein, the Marsh clay (peat soil) derived silica doped high yield and porous graphitic carbon (MCC) produced by simple pyrolysis and PVA/KOH polymer gel electrolyte are used as innovative components of the all-solid-state symmetric supercapacitor. Various characterizations were used to study the phase, microstructural, thermal, morphological, porosity, surface area, and compositional examination of the materials. An all-solid-state symmetric supercapacitor device based on the MCC and PVA/KOH gel electrolyte is fabricated. The developed supercapacitor device delivers a maximum specific capacitance of 160 F/g (at a scan rate of 10 mV/s) and exhibits a high energy density of ~18 Wh/kg at a power density of ~312 W/kg, and displays low resistance and good cycling stability. Overall, the developed all-solid-state symmetric supercapacitor with the novel MCC and PVA/KOH gel electrolyte represents the potential for high-performance supercapacitors.
Bibliographical noteFunding Information:
The research support provided by the Interdisciplinary Research Center for Hydrogen and Energy Storage ( IRC-HES ), King Fahd University of Petroleum & Minerals, Dhahran , Saudi Arabia, through the project INHE-2105 and King Abdullah City for Atomic and Renewable Energy (K.A. CARE), through the project KACARE211-RFP-03 are highly acknowledged. The authors would like to thank Hatim Dafalla (Core Research Facilities, KFUPM) for his valuable help with the TEM analysis.
© 2022 Elsevier Ltd
- All-solid-state symmetric supercapacitor
- High cyclic stability
- Marsh clay
- Nickel foam substrate
- PVA/KOH gel polymer electrolyte
- Porous graphitic carbon
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering