[18p-PB3-1~95] 17 Nanocarbon Technology (Poster)

▲ [18p-PB3-28] Cationic N-doped carbon wrapping CNT to enhance electrical conductivity

〇SANGWOO CHAE¹, Bratescu Maria Antoaneta², Saito Nagahiro^1,2,3 (1.Nagoya Univ., 2.Innovation for Future Society Inst., 3.Conjoint Research Lab. in Nagoya-Shinshu Univ.)

Keywords:Cationic N-doped carbon wrapping CNT, Solution plasma, Electrical conductivity

Recently, many studies have examined high-performance carbon materials for application in the next-generation of batteries. Cationic N-doped carbon (CN-C) and Cationic N-doped carbon rapping CNT (CN-C@CNT) were easily synthesized via a new route in solution plasma (SP) at ambient temperature and atmospheric pressure. Our approach provides the following major benefits: fast process, simple device configuration, and one-pot process for the synthesis of CN-C and CNC@CNT simultaneously. Plasma was generated between two nickel electrodes immersed into a suspension of CNT in a mixture of aniline and HCl. This electrode was used for discharging for 15 minutes under the conditions of 0.5 mm distance between electrodes, frequency 35 kHz, pulse width 1.0 µs, the CN-C@CNT of hybrid composite was obtained. We have successfully fabricated a very stable hybrid composite structure that wrapping CN-C on CNT for electrocatalytic applications. The morphology of hybrid composite were confirmed by SEM and TEM. This electron microscope images clearly shows that each CNT is uniformly coated with N-doped carbon. The nitrogen content was confirmed to be 7.8% by XPS and the cation nitrogen amount increases 1.6 times in CN-C@SWCNT compared to CN-C. The electrical properties were evaluated by 4 probe method. By using SP-synthesized the CN-C@CNT presented an electrical conductivity of 120 S/cm, which is comparable with that of SP-synthesized CN-C (4 S/cm), N-doped carbon nanofibers (15 S/cm, Ismagilov et al., Carbon, 2009) and N-doped carbon nanotubes (25 S/cm, Fujisawa et al., Nanoscale, 2011).