Room Temperature Ultrafast Synthesis Of N- And O-Rich Graphene Films With An Expanded Interlayer Distance For High Volumetric Capacitance Supercapacitors
NANOSCALE(2019)
摘要
An electrochemical functionalization method is developed to fabricate N- and O-rich graphene films (F-RGO-60) with an expanded interlayer distance. In particular, the functionalization process could be completed within 60 seconds at room temperature, which is conducive to large-scale commercial applications. Electrochemical synthesis of F-RGO-60 leads to two synergetic effects simultaneously: (1) the expansion of the interlayer distance caused by a bubble effect, which leads to more exposure of the active surface area and (2) the introduction of N-doped sites and oxygen-containing functional groups, which not only improves the hydrophilicity of F-RGO-60 but also provides extra pseudocapacitance. It is worth mentioning that after electrochemical functionalization, F-RGO-60 can still maintain a high density of 1.47 g cm(-3). Due to their optimal surface area, good electrolyte wettability and massive redox-active sites, the specific capacitance of F-RGO-60 films can reach up to 319.4 F cm(-3) (217.3 F g(-1)) at 1 A g(-1) in a three-electrode system, which is about 3.6 times larger than that of RGO films (60 F g(-1)). The integration of the low-cost preparation method and outstanding performance suggests that F-RGO-60 has great development prospects as supercapacitor electrode materials.
更多查看译文
关键词
ultrafast synthesis,o-rich
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要