Enhanced cycle stability of polypyrrole-derived nitrogen-doped carbon-coated tin oxide hollow nanofibers for lithium battery anodes. (January 2017)

• Record Type: Journal Article
• Authors: Pham-Cong, De; Park, Jung Soo; Kim, Jae Hyun; Kim, Jinwoo; Braun, Paul V.; Choi, Jun Hee; Kim, Su Jae; Jeong, Se Young; Cho, Chae Ryong
• Is Part Of: Carbon. Volume 111(2017)
• Page Start: 28
• Page End: 37
• Publication Date: 2017-01
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2016.09.057
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: 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. 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 −1 after 100 cycles is 1648 mAh g −1, which is 427% higher than that of (386 mAh g −1 ) SnO2 hNFs. 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. Graphical abstract: