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Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
3D printed interdigitated supercapacitor using reduced graphene oxide-MnO /Mn3O4 based electrodes.
Mahshid Mokhtarnejad1,2,3, Erick L Ribeiro1,2,3, Dibyendu Mukherjee1,2,3
1Department of Chemical & Biomolecular Engineering, University of Tennessee Knoxville Tennessee 37996 USA bkhomami@utk.edu dmukherj@utk.edu.
This study introduces novel manganese oxide/reduced graphene oxide hybrid nanocomposites synthesized using Laser Ablation Synthesis in Solution (LASiS) for advanced energy storage devices. These materials demonstrate superior supercapacitance and charge storage capacity compared to commercial alternatives.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Developing high-performance electrode materials is crucial for advancing energy storage devices.
- Hybrid nanocomposites offer synergistic properties for enhanced electrochemical performance.
- Manganese oxides and reduced graphene oxide are promising candidates for supercapacitors.
Purpose of the Study:
- To synthesize and characterize novel hybrid nanocomposites (HNCs) of manganese oxides (MnO/Mn3O4) and reduced graphene oxide (rGO) using the Laser Ablation Synthesis in Solution (LASiS) technique.
- To investigate the correlation between HNC composition, morphology, and electrochemical performance for energy storage applications.
- To demonstrate the potential of LASiS-synthesized HNCs in inkjet-printed electrodes for superior supercapacitance.
Main Methods:
- Synthesis of MnO/Mn3O4-rGO hybrid nanocomposites via Laser Ablation Synthesis in Solution (LASiS).
- Structural characterization using advanced techniques to confirm material composition and morphology.
- Electrochemical characterization, including galvanostatic charge-discharge (GCD) and specific capacitance measurements.
- Fabrication of functional electrodes using sequential inkjet printing.
Main Results:
- LASiS successfully produced MnO/Mn3O4 nanorods and nanoparticles embedded in rGO nanosheets.
- Electrode performance was strongly correlated with the MnO/Mn3O4 to rGO ratio and nanostructure morphology.
- LASiS-synthesized MnO/Mn3O4-rGO electrodes exhibited significantly higher specific capacitance (325 F g-1) than commercial counterparts (189 F g-1).
- Inkjet-printed electrodes using LASiS materials demonstrated superior supercapacitance.
Conclusions:
- The LASiS technique is effective for synthesizing high-performance MnO/Mn3O4-rGO hybrid nanocomposites for energy storage.
- Optimized HNCs and inkjet printing enable the fabrication of advanced, all-printed electronics with enhanced electrochemical performance.
- This approach offers a promising pathway for next-generation energy storage solutions.
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