| 학회 | 한국재료학회 |
| 학술대회 | 2017년 봄 (05/17 ~ 05/19, 목포 현대호텔) |
| 권호 | 23권 1호 |
| 발표분야 | C. 에너지 재료 분과 |
| 제목 | Enhanced electrochemical performance of N-doped carbon-coated SnO2 hollow nanofibers for Li battery anodes |
| 초록 | SnO2 hollow nanofibers (SnO2 hNFs) are prepared through electrospinning and annealing processes. The polypyrrole layers coated onto the surface of the SnO2 hNFs are annealed in a nitrogen atmosphere. The nitrogen-doped carbon-coated SnO2 hNFs (SnO2/NC hNFs) are composed of SnO2 hNFs with a wall thickness of 60-80 nm and a nitrogen-doped carbon layer ~10 nm thick. We also systematically investigated the microstructure and chemical bonding states of SnO2 hNFs and SnO2/NC hNFs, focusing on the behavior of N-doped carbon in electrically conductive supporting materials. The nitrogen content in the carbon layer is approximately 7.95%. Owing to the nitrogen-doped carbon shell layers, the specific reversible capacity of SnO2/NC hNFs at a current density of 0.2 A/ g after 100 cycles is 1648 mAh/g, which is 427% higher than that of (386 mAh/g) SnO2 hNFs. This result might be considered due to the trapping phenomenon of Li+ in N-doped carbon-coated layers and the high efficiency carrier transport effect of the carbon-coated hNFs. Therefore, this study suggests that SnO2/NC hNFs could be a promising anode material with a high energy density and enhanced cycle stability for LIB applications. This strategy may open new avenues for the design of other composite architectures as electrode materials in order to achieve high-performance lithium ion batteries. *This research is supported by "The Project of Conversion by the Past R&D Results" through the Ministry of Trade, Industry and Energy (MOTIE) (N0002136) and This work was supported by a research program (grant NRF- 2015R1D1A3A01018611) through the Ministry of Education. |
| 저자 | De Pham-Cong, Su Jae Kim, Cheul-Eon Park, Yang Hang, Hyun Woo Choi, Chae-Ryong Cho |
| 소속 | Pusan National Univ. |
| 키워드 | N-doped carbon; SnO<SUB>2</SUB> hollow nanofiber; Li battery; |
