物理化学学报Issue(11)：2077-2084,8.DOI:10.3866/PKU.WHXB201409152
水热反应温度对三维还原氧化石墨烯的形貌、结构和超级电容性能的影响
Effect of the Hydrothermal Reaction Temperature on Three-Dimensional Reduced Graphene Oxide′s Appearance, Structure and Super Capacitor Performance
摘要
Abstract
Three-dimensional reduction of graphene oxide with a series of different degrees of reduction was performed by the hydrothermal method in the temperature range from 120 to 220 °C, with graphene oxide sols as the precursor and prepared by graphite oxide gels. The effect of the temperature of the hydrothermal reaction on the materials¹ appearance, structure, and super capacitor performance was investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and electrochemical measurements. The results show that the prepared three dimensional reduction of graphene oxide was porous and reticulated, and its volume and inner mesh aperture gradual y decreased with increasing temperature, while its degree of reduction and order increased at the same time, and its structure gradual y transformed to the graphite oxide structure. However, the materials′specific capacitance and energy density showed the tendency of first increasing and then decreasing, with the electric double-layer capacitor mainly remaining. The three-dimensional reduction of graphene oxide materials at 180 °C resulted in the best super capacitor performance, with a specific capacitance of 315 F∙g−1 when the current density was 0.5 A∙g−1 and 212 F∙g−1 when the current density was 10 A∙g−1. Its energy density was 40.5 Wh∙kg−1 and its specific capacitance was 86%after 5000 cycles, with al these properties indicating its good super capacitor performance.关键词
氧化石墨凝胶/水热法/多孔网状/超级电容器/比电容Key words
Graphite oxide gel/Hydrothermal method/Porous and reticulated/Supercapacitor/Specific capacitance分类
化学化工引用本文复制引用
汪建德,彭同江,孙红娟,侯云丹..水热反应温度对三维还原氧化石墨烯的形貌、结构和超级电容性能的影响[J].物理化学学报,2014,(11):2077-2084,8.基金项目
The project was supported by the National Natural Science Foundation of China (41272051), Dr Fund Project of Southwest University of Science and Technology, China (11ZX7135), Postgraduate Innovation Fund Project of Southwest University of Science and Technology, China (14ycx003).国家自然科学基金(41272051),西南科技大学博士基金(11ZX7135)及西南科技大学研究生创新基金(14ycx003)资助项目 （41272051）
