Jana Milan, Khanra Partha, Murmu Naresh Chandra, Samanta Pranab, Lee Joong Hee, Kuila Tapas
Surface Engineering & Tribology Division, Council of Scientific and Industrial Research-Central Mechanical Engineering Research Institute, Durgapur - 713209, India.
Phys Chem Chem Phys. 2014 Apr 28;16(16):7618-26. doi: 10.1039/c3cp54510e.
A simple and effective method using 6-amino-4-hydroxy-2-naphthalenesulfonic acid (ANS) for the synthesis of water dispersible graphene has been described. Ultraviolet-visible (UV-vis) spectroscopy reveals that ANS-modified reduced graphene oxide (ANS-rGO) obeys Beers law at moderate concentrations. Fourier transform infrared and X-ray photoelectron spectroscopies provide quantitative information regarding the removal of oxygen functional groups from graphene oxide (GO) and the appearance of new functionalities in ANS-rGO. The electrochemical performances of ANS-rGO have been determined by cyclic voltammetry, charge-discharge and electrochemical impedance spectroscopy analysis. Charge-discharge experiments show that ANS-rGO is an outstanding supercapacitor electrode material due to its high specific capacitance (375 F g(-1) at a current density of 1.3 A g(-1)) and very good electrochemical cyclic stability (∼97.5% retention in specific capacitance after 1000 charge-discharge cycles). ANS-rGO exhibits promising characteristics with a very high power density (1328 W kg(-1)) and energy density (213 W h kg(-1)).
本文描述了一种使用6-氨基-4-羟基-2-萘磺酸（ANS）合成水分散性石墨烯的简单有效方法。紫外可见（UV-vis）光谱表明，ANS修饰的还原氧化石墨烯（ANS-rGO）在中等浓度下符合比尔定律。傅里叶变换红外光谱和X射线光电子能谱提供了有关从氧化石墨烯（GO）中去除氧官能团以及ANS-rGO中新官能团出现的定量信息。通过循环伏安法、充放电和电化学阻抗谱分析测定了ANS-rGO的电化学性能。充放电实验表明，ANS-rGO是一种出色的超级电容器电极材料，因其具有高比电容（在电流密度为1.3 A g(-1)时为375 F g(-1)）和非常好的电化学循环稳定性（1000次充放电循环后比电容保留率约为97.5%）。ANS-rGO具有非常高的功率密度（1328 W kg(-1)）和能量密度（213 W h kg(-1)），展现出良好的特性。
