Next Article in Journal
Enhanced Electroluminescence from Silicon Quantum Dots Embedded in Silicon Nitride Thin Films Coupled with Gold Nanoparticles in Light Emitting Devices
Next Article in Special Issue
Sandwich-Type Nitrogen and Sulfur Codoped Graphene-Backboned Porous Carbon Coated Separator for High Performance Lithium-Sulfur Batteries
Previous Article in Journal
Optimization of Iron Oxide Tracer Synthesis for Magnetic Particle Imaging
Previous Article in Special Issue
New Three-Dimensional Porous Electrode Concept: Vertically-Aligned Carbon Nanotubes Directly Grown on Embroidered Copper Structures
Article

Converting Corncob to Activated Porous Carbon for Supercapacitor Application

by 1,2 and 1,2,*
1
Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Kowloon, Hong Kong, China
2
Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518057, China
*
Author to whom correspondence should be addressed.
Nanomaterials 2018, 8(4), 181; https://doi.org/10.3390/nano8040181
Received: 6 January 2018 / Revised: 7 February 2018 / Accepted: 15 February 2018 / Published: 21 March 2018
(This article belongs to the Special Issue Carbon nanostructure for energy storage and conversion)
Carbon materials derived from biomass are promising electrode materials for supercapacitor application due to their specific porosity, low cost and electrochemical stability. Herein, a hierarchical porous carbon derived from corncob was developed for use as electrodes. Benefitting from its hierarchical porosity, inherited from the natural structure of corncob, high BET surface area (1471.4 m2·g−1) and excellent electrical conductivity, the novel carbon material exhibited a specific capacitance of 293 F·g−1 at 1 A·g−1 in 6 M KOH electrolyte and maintained at 195 F·g−1 at 5 A·g−1. In addition, a two-electrode device was assembled and delivered an energy density of 20.15 Wh·kg−1 at a power density of 500 W·kg−1 and an outstanding stability of 99.9% capacitance retention after 4000 cycles. View Full-Text
Keywords: biowaste; hierarchical porous carbon; KOH activation; symmetric supercapacitor biowaste; hierarchical porous carbon; KOH activation; symmetric supercapacitor
Show Figures

Graphical abstract

MDPI and ACS Style

Yang, S.; Zhang, K. Converting Corncob to Activated Porous Carbon for Supercapacitor Application. Nanomaterials 2018, 8, 181. https://doi.org/10.3390/nano8040181

AMA Style

Yang S, Zhang K. Converting Corncob to Activated Porous Carbon for Supercapacitor Application. Nanomaterials. 2018; 8(4):181. https://doi.org/10.3390/nano8040181

Chicago/Turabian Style

Yang, Shaoran, and Kaili Zhang. 2018. "Converting Corncob to Activated Porous Carbon for Supercapacitor Application" Nanomaterials 8, no. 4: 181. https://doi.org/10.3390/nano8040181

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop