|
|||||
|
|
Synthesis and lithium storage property of high-performance N-doped reduced graphene oxide |
|
| Authors: | SHEN Jinran GUO Cuijing CHEN He ZHOU Shuqin XU Bin GUAN Yibiao |
| Affiliation: | 1 China Electric Power Research Institute, Beijing 100192, China; 2 College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China; 3 State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems, China Electric Power Research Institute, Beijing 100192, China |
| Abstract: | Graphene is a two-dimensional carbon material with high conductivity, good chemical stability and excellent electrochemical performance, which has promising prospects in energy storage field. Nitrogen doping can not only create structural defects, but also change the electronic distribution for graphene, which is beneficial for the electrochemical energy storage properties. In our work, the nitrogendoped graphene (N-rGO) was prepared using low cost nitrogen source (urea) and graphene oxide solution by freeze-drying and the subsequent high-temperature thermal reduction. The effects of thermal reduction temperature on the chemical composition, structure and electrochemical properties of the N-rGO were also studied. The results show that with the increase of thermal reduction temperature, the nitrogen content decreases, while the graphitization degree and the conductivity increases (72.3 S·cm-1), indicating the improved lithium storage performance. Tested in half-cell as anode material, the N-rGO-800 exhibits a high reversible capacity of 876 mA·h·g-1 at 0.05 A·g-1, superior to the values reported previously. Meanwhile, the specific capacity can retain 584 mA·h·g-1 at 1 A·g-1 and remains stable after 850 cycles, indicating excellent cyclic stability and good rate performance. |
| Keywords: | nitrogen doped reduced graphene oxide anode materials lithium ion battery |
| 点击此处可从《储能科学与技术》浏览原始摘要信息 | |
| 点击此处可从《储能科学与技术》下载免费的PDF全文 | |