Cobalt-manganese oxide/hydroxide nanostructure on flexible carbon cloth as a binder-free electrode for quasi-solid-state symmetric supercapacitor
In this study, cobalt hydroxide, manganese oxide, and cobalt-manganese oxide/hydroxide with different manganese-cobalt ratios are grown in-situ on a carbon cloth (CC) through a one-step hydrothermal process. These materials serve as self-supporting electrodes for flexible supercapacitors. This metho...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
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| Series: | Heliyon |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844025013738 |
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| Summary: | In this study, cobalt hydroxide, manganese oxide, and cobalt-manganese oxide/hydroxide with different manganese-cobalt ratios are grown in-situ on a carbon cloth (CC) through a one-step hydrothermal process. These materials serve as self-supporting electrodes for flexible supercapacitors. This method enables the growth of porous nanostructures on the surface of carbon cloth fibers at relatively low temperatures using inexpensive and environmentally friendly materials. Various methods are utilized to characterize the fabricated samples, and the results confirm the formation of metal oxide/hydroxide on the CC surface. Electrochemical analysis is conducted using two- and three-electrode systems. According to the electrochemical results, the best cobalt-manganese oxide-hydroxide/CC electrode (CM2/CC sample) shows the best performance, achieving 183.5 mF/cm2 specific capacitance at 1.3 mA/cm2. Additionally, a flexible solid-state supercapacitor is fabricated using the CM2/CC electrode as both positive and negative electrode. This configuration achieves a maximum energy density of 40.52 μWh/cm2 (with a power density of 500 μW/cm2) and an ultra-high capacity retention of 96.5 % after 10000 long charge-discharge cycles, indicating the great application potential of this supercapacitor in next-generation flexible and portable devices. |
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| ISSN: | 2405-8440 |