Jump to main content
Jump to site search

Issue 11, 2016
Previous Article Next Article

Preparation of eggplant-derived macroporous carbon tubes and composites of EDMCT/Co(OH)(CO3)0.5 nano-cone-arrays for high-performance supercapacitors

Author affiliations

Abstract

A novel biomass-derived interconnected macroporous carbon tube structure was prepared for the first time by the freeze drying technique followed by carbonization of eggplant under N2. Unique Co(OH)(CO3)0.5 nano-cone arrays were grown on both sides of the thin walls of the macroporous carbon tubes by a simple one-step hydrothermal method without any additives. The obtained composites were used for supercapacitors, and showed high performance. The composite electrode exhibited an improved specific capacitance (2.6 times of the pure Co(OH)(CO3)0.5), good rate capability (retention up to 56% even at 40 A gāˆ’1), and cycle stability. It is speculated that the synergistic effect of highly graphitized macroporous carbon tubes and nano-array structures contributes to the fast electron transport and ion diffusion, thus improving the electrochemical performance. The composites prove to be promising materials for supercapacitors due to their easy availability, low cost and high performance.

Graphical abstract: Preparation of eggplant-derived macroporous carbon tubes and composites of EDMCT/Co(OH)(CO3)0.5 nano-cone-arrays for high-performance supercapacitors

Back to tab navigation

Supplementary files

Article information


Submitted
06 Dec 2015
Accepted
12 Feb 2016
First published
18 Feb 2016

J. Mater. Chem. A, 2016,4, 4296-4304
Article type
Paper

Preparation of eggplant-derived macroporous carbon tubes and composites of EDMCT/Co(OH)(CO3)0.5 nano-cone-arrays for high-performance supercapacitors

Y. Qu, G. Zan, J. Wang and Q. Wu, J. Mater. Chem. A, 2016, 4, 4296
DOI: 10.1039/C5TA09948J

Social activity

Search articles by author

Spotlight

Advertisements