Issue 1, 2014

Human hair-derived carbon flakes for electrochemical supercapacitors

Abstract

Heteroatom doped porous carbon flakes were prepared via carbonization of Chinese human hair fibers and employed for high-performance supercapacitor electrode materials. The morphology and chemical composition of the resultant carbon materials were characterized by electron microscopy (EM), energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS) measurements. Human hair carbonized at 800 °C exhibited high charge storage capacity with a specific capacitance of 340 F g−1 in 6 M KOH at a current density of 1 A g−1 and good stability over 20 000 cycles. The specific capacitance of 126 F g−1 is also verified in a 1 M LiPF6 ethylene carbonate/diethyl carbonate (EC/DEC) organic electrolyte at a current density of 1 A g−1. The high supercapacitor performance could be due to the micro/mesoporosity combined with high effective surface area and heteroatom doping effects, combining double layer and Faradaic contributions.

Graphical abstract: Human hair-derived carbon flakes for electrochemical supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
16 Sep 2013
Accepted
08 Nov 2013
First published
12 Nov 2013

Energy Environ. Sci., 2014,7, 379-386

Human hair-derived carbon flakes for electrochemical supercapacitors

W. Qian, F. Sun, Y. Xu, L. Qiu, C. Liu, S. Wang and F. Yan, Energy Environ. Sci., 2014, 7, 379 DOI: 10.1039/C3EE43111H

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