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Human hair-derived carbon flakes for electrochemical supercapacitors

Wenjing Qian,^a   Fengxia Sun,^b   Yanhui Xu,^b   Lihua Qiu,^a   Changhai Liu,^c   Suidong Wang^c and   Feng Yan*^a （严锋） 

^a Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, China

^b Institute of Chemical Power Sources, Soochow University, Suzhou, China

^c Jiangsu Key Laboratory of Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, China

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

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.

链接： //pubs.rsc.org/en/Content/ArticleLanding/2014/EE/c3ee43111h#!divAbstract