Nitrogen doped carbon nanotubes and nanofibers: Composition, structure, electrical conductivity and capacity properties. (October 2017)

• Record Type: Journal Article
• Authors: Podyacheva, Olga Yu.; Cherepanova, Svetlana V.; Romanenko, Anatoly I.; Kibis, Lidiya S.; Svintsitskiy, Dmitry A.; Boronin, Andrei I.; Stonkus, Olga A.; Suboch, Arina N.; Puzynin, Andrei V.; Ismagilov, Zinfer R.
• Is Part Of: Carbon. Volume 122(2017)
• Page Start: 475
• Page End: 483
• Publication Date: 2017-10
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2017.06.094
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Structurally different nitrogen doped nanotubes and nanofibers (N-CNTs and N-CNFs) synthesized by a standard method of decomposing ethylene-ammonia mixtures on metal catalysts were studied. In N-CNTs the uniform distribution of nitrogen and the formation of the ordered defects were registered. The ordered defects comprise four carbon vacancies and pyridine-like nitrogen, according to the performed structural simulation. On the contrary, N-CNFs were found to have the non-uniform distribution of nitrogen; their structural defects are disordered and also contain the pyridine-like nitrogen. An increase in the nitrogen content in N-CNTs, and hence in the amount of ordered defects, leads to a monotonic decrease in conductivity. For N-CNFs the dependence of conductivity on the nitrogen content is non-monotonic and is characterized by the extremum due to the competition of electron doping and structure disordering. A similar enhancement of the electrode capacity with raising the nitrogen content both in N-CNTs and N-CNFs was observed and explained by improved hydrophilic properties of the nitrogen doped carbon nanomaterials. Graphical abstract: