An environment-friendly route to synthesize reduced graphene oxide as a supercapacitor electrode material
An environment-friendly route to synthesize reduced graphene oxide as a supercapacitor electrode material
复制标题
DOI：
10.1016/j.electacta.2012.03.024
复制
发表时间：
2012-05
影响因子：
6.6
通讯作者：
Dacheng Zhang;Xiong Zhang;Yao Chen;Changhui Wang;Yanwei Ma
中科院分区：
文献类型：
--
作者：
Dacheng Zhang;Xiong Zhang;Yao Chen;Changhui Wang;Yanwei Ma
以谷胱甘肽为还原剂和稳定剂，开发了一种大规模、环境友好的水溶性还原氧化石墨烯的制备方法。紫外-可见吸收光谱、X射线光电子能谱、原子力显微镜和透射电子显微镜的结果表明，氧化石墨烯被还原为单层石墨烯纳米片，在水中具有良好的分散性。提出了反应机理。通过循环伏安法和恒流充放电测试研究了石墨烯纳米片作为超级电容器电极材料的电化学性能。在1 M H2SO 4电解液中获得了238 Fg − 1的最大比电容。同时，该材料显示出优异的长期循环稳定性，沿着，在1000次循环测试后，比电容保持率为97%。
A large-scale, environment-friendly method to produce water-soluble reduced graphene oxide by using glutathione as a reducing and stabilization agent has been developed. The results of UV–visible absorption spectroscopy, X-ray photoelectron spectroscopy, atomic force microscopy, and transmission electron microscopy indicate that graphene oxide is reduced to graphene nanosheets which are single-layers and exhibit good dispersion in water. A reaction mechanism is proposed. The electrochemical properties of the graphene nanosheets as electrode materials for supercapacitors are studied by cyclic voltammetry and galvanostatic charge/discharge tests. A maximum specific capacitance of 238Fg−1in a 1M H2SO4electrolyte has been obtained. Meanwhile, the material shows excellent long-term cycle stability along with the retention of 97% for specific capacitance after 1000cycle tests.