Direct electrochemical N-doping to carbon paper in molten LiCl-KCl-Li3N
来源期刊：International Journal of Minerals Metallurgy and Materials2020年第12期
论文作者：Dong-hua Tian Zhen-chao Han Ming-yong Wang Shu-qiang Jiao
摘 要：Graphite materials are widely used as electrode materials for electrochemical energy storage. N-doping is an effective method for enhancing the electrochemical properties of graphite. A novel one-step N-doping method for complete and compact carbon paper was proposed for molten salt electrolysis in the Li Cl-KCl-Li3 N system. The results show that the degree of graphitization of carbon paper can be improved by the electrolysis of molten salts, especially at 2.0 V. Nitrogen gas was produced at the anode and nitrogen atoms can substitute carbon atoms of carbon paper at different sites to create nitrogen doping during the electrolysis process. The doping content of N in carbon paper is up to 13.0 wt%. There were three groups of nitrogen atoms, i.e. quaternary N（N-Q）, pyrrolic N（N-5）, and pyridinic N（N-6） in N-doping carbon paper. N-doping carbon paper as an Al-ion battery cathode shows strong charge-recharge properties.
Dong-hua Tian，Zhen-chao Han，Ming-yong Wang，Shu-qiang Jiao
State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing
摘 要：Graphite materials are widely used as electrode materials for electrochemical energy storage. N-doping is an effective method for enhancing the electrochemical properties of graphite. A novel one-step N-doping method for complete and compact carbon paper was proposed for molten salt electrolysis in the Li Cl-KCl-Li3 N system. The results show that the degree of graphitization of carbon paper can be improved by the electrolysis of molten salts, especially at 2.0 V. Nitrogen gas was produced at the anode and nitrogen atoms can substitute carbon atoms of carbon paper at different sites to create nitrogen doping during the electrolysis process. The doping content of N in carbon paper is up to 13.0 wt%. There were three groups of nitrogen atoms, i.e. quaternary N（N-Q）, pyrrolic N（N-5）, and pyridinic N（N-6） in N-doping carbon paper. N-doping carbon paper as an Al-ion battery cathode shows strong charge-recharge properties.
关键词：
