Jump to main content
Jump to site search

Issue 35, 2015
Previous Article Next Article

Facile self-templating large scale preparation of biomass-derived 3D hierarchical porous carbon for advanced supercapacitors

Author affiliations

Abstract

Corn husk, a renewable biomass, has been successfully explored as a low-cost crude carbon source to prepare advanced higher-value 3D HPCs by means of KOH pre-treatment and direct pyrolysis, the synthesis route is simple, self-templating and easy to scale-up for industrialization. The CHHPCs present many advantages for supercapacitor applications, including higher surface area (928 m2 g−1), hierarchical porosity consisting of macro, meso, and micropores, a turbostratic carbon structure, uniform pore size, 3D architecture and rich O-doping (17.1 wt%). The supercapacitor performance of CHHPCs was evaluated in a 6 M KOH electrolyte and 1 M Na2SO4 electrolyte. The CHHPCs exhibit a high specific capacitance of 356 F g−1 and 300 F g−1 at 1 A g−1, 20 A g−1, respectively, ultra-high rate capability with 88% retention rate from 1 to 10 A g−1 and outstanding cycling stability with 95% capacitance retention after 2500 cycles. The CHHPCs symmetric supercapacitor display a high energy density of 21 W h kg−1 at a power density of 875 W kg−1 and retains as high as 11 W h kg−1 at 5600 W kg−1 in 1 M Na2SO4 electrolyte. The facile, efficient and template-free synthesis strategy for novel 3D-HPCs from biomass sources may promote commercial application of 3D-HPCs in the fields of supercapacitors, lithium ion batteries, fuel cells and sorbents.

Graphical abstract: Facile self-templating large scale preparation of biomass-derived 3D hierarchical porous carbon for advanced supercapacitors

Back to tab navigation

Supplementary files

Publication details

The article was received on 25 Jun 2015, accepted on 28 Jul 2015 and first published on 28 Jul 2015


Article type: Paper
DOI: 10.1039/C5TA04721H
Citation: J. Mater. Chem. A, 2015,3, 18154-18162
  •   Request permissions

    Facile self-templating large scale preparation of biomass-derived 3D hierarchical porous carbon for advanced supercapacitors

    S. Song, F. Ma, G. Wu, D. Ma, W. Geng and J. Wan, J. Mater. Chem. A, 2015, 3, 18154
    DOI: 10.1039/C5TA04721H

Search articles by author

Spotlight

Advertisements