Abstract
There is an increasing demand of low cost, flexible, stable, and environmentally benign power sources for emerging wearable electronic equipment. Herein, we develop electrochemical capacitor electrodes based on MnO2/carbonized cotton textile with high mass-loading and tunable morphology. After a simple carbonization process, the cotton cloth with high surface area (585 m2 g−1) served as 3D binder-free and flexible scaffolds to anchor MnO2 nanostructures. The morphology of MnO2 nanostructures was tuned and optimized into curled sheet-like, which provided large surface area and could also release large local stress. Electrochemical measurements showed that the curled sheet-like MnO2 had a specific capacitance of 465 F g−1 at 0.1 A g−1, and exhibited an excellent cyclic stability with a specific capacitance retention ratio of 95% after 5000 cycles (at 10 A g−1). Due to the flexible nature of cotton textile, the hybrid electrodes could be bent freely, and the capacitance and cyclability almost remained unchanged even at a bending angle of 150°. Such flexible and stable electrodes from low cost and environmentally benign biomass offer new development potentials for energy storage and wearable electronic applications.
Original language | British English |
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Pages (from-to) | 655-662 |
Number of pages | 8 |
Journal | Journal of Alloys and Compounds |
Volume | 729 |
DOIs | |
State | Published - 2017 |
Keywords
- Capacitors
- Carbonized cotton textile
- Cyclability
- MnO
- Tunable morphology