Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5458290 | Journal of Alloys and Compounds | 2017 | 24 Pages |
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 gâ1) 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 gâ1 at 0.1 A gâ1, and exhibited an excellent cyclic stability with a specific capacitance retention ratio of 95% after 5000 cycles (at 10 A gâ1). 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.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Yani Zhang, Tianyan Mao, Laifei Cheng, Heng Wu, Rui Wu, Lianxi Zheng,