A top-down approach for fabricating free-standing bio-carbon supercapacitor electrodes with a hierarchical structure.

ABSTRACT: Biomass has delicate hierarchical structures, which inspired us to develop a cost-effective route to prepare electrode materials with rational nanostructures for use in high-performance storage devices. Here, we demonstrate a novel top-down approach for fabricating bio-carbon materials with stable structures and excellent diffusion pathways; this approach is based on carbonization with controlled chemical activation. The developed free-standing bio-carbon electrode exhibits a high specific capacitance of 204 F g(-1) at 1 A g(-1); good rate capability, as indicated by the residual initial capacitance of 85.5% at 10 A g(-1); and a long cycle life. These performance characteristics are attributed to the outstanding hierarchical structures of the electrode material. Appropriate carbonization c

SUBMITTER: Li Y 

PROVIDER: S-EPMC4585789 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature