Chlorine-doped reduced graphene oxide nanosheets as an efficient and stable electrode for supercapacitor in acidic medium
详细信息 查看全文
- 作者：Karim Kakaei ; kakaei@maragheh.ac.ir" class="auth_mail" title="E-mail the corresponding author ; k_kakaei56@yahoo.com" class="auth_mail" title="E-mail the corresponding author ; Milad Hamidi ; Somayeh Husseindoost
- 关键词：Electro-synthesis ; Reduced graphene oxide ; Chlorine-doped ; Supercapacitor ; Electrochemical performance
- 刊名：Journal of Colloid and Interface Science
- 出版年：2016
- 出版时间：1 October 2016
- 年：2016
- 卷：479
- 期：Complete
- 页码：121-126
- 全文大小：1643 K
文摘
We demonstrate the efficient doping of reduced graphene oxide (RGO) by Chlorine and its capacitive performance was calculated by cyclic voltammetry and charge–discharge cycling in 1 M H2SO4 solution. In this regard, we are prepared RGO nanosheets through a simple, eco-friendly and efficient electrochemical method, with selectively functionalized edges by chlorine which involves added the RGO to the halogen-containing acid solution and dispersed by ultrasonic. After synthesis, Cl-RGO is characterized using X-ray diffraction, Raman spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, Energy-dispersive X-ray (EDX) spectroscopy and tunneling electron microscopy. FTIR spectra show the chlorine-containing functional groups. Energy-dispersive X-ray spectroscopy analysis confirmed the presence of doped chlorine in RGO. Raman spectroscopy shows a high density of defects in the RGO layer. Electrochemical characteristics of Cl-RGO are characterized by cyclic voltammetery, galvanostatic charge/discharge and electrochemical impedance spectroscopy. According to the galvanostatic charge/discharge analysis, Cl-RGO represents specific capacitance (Cs) of 178.4 F g−1 at current density of 1 A g−1, which is higher than that of RGO (100.5 F g−1) in H2SO4 solution.