3D flower-structured graphene from CO2 for supercapacitors with ultrahigh areal capacitance at high current density
Document Type
Article
Publication Date
5-21-2015
Department
Department of Materials Science and Engineering
Abstract
© The Royal Society of Chemistry 2015. The widespread application of supercapacitors, which store electrical charge on high-surface-area conducting materials, is limited by their small accessible area and low areal mass loading of active materials due to their microporous structures. Herein, we report that 3D cauliflower-fungus-like graphene (CFG) with hierarchical mesoporous-structure and large fully accessible surface area, which was synthesized directly from CO2via the one-step exothermic approach, exhibited an ultrahigh areal capacitance up to 1.16 F cm-2 at a high current density up to 10 A g-1. The excellent performance remained almost unchanged with increasing temperature to 55 °C. Furthermore, the 3D CFG electrode can reach a high efficient-mass-loading of 11.16 mg cm-2, which meets the current commercial requirement (about 10 mg cm-2). This solves a critical issue that the enhancement of mass loading usually sacrifices the mass capacitance.
Publication Title
Journal of Materials Chemistry A
Recommended Citation
Chang, L.,
Wei, W.,
Sun, K.,
&
Hu, Y.
(2015).
3D flower-structured graphene from CO2 for supercapacitors with ultrahigh areal capacitance at high current density.
Journal of Materials Chemistry A,
3(19), 10183-10187.
http://doi.org/10.1039/c5ta01055a
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/2124