Encapsulating MWNTs into hollow porous carbon nanotubes : a tube-in-tube carbon nanostructure for high-performance lithium-sulfur batteries

• Main Authors: Wu, Wangliang, Li, Jiaxin, Xu, Zhichuan, Guan, Lunhui, Zhao, Yi
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2014
• Subjects: DRNTU::Engineering::Materials::Nanostructured materials
• Online Access: https://hdl.handle.net/10356/106060; http://hdl.handle.net/10220/20067
• Institution: Nanyang Technological University

A tube-in-tube carbon nanostructure (TTCN) with multi-walled carbon nanotubes (MWNTs) confined within hollow porous carbon nanotubes is synthesized for Li-S batteries. The structure is designed to enhance the electrical conductivity, hamper the dissolution of lithium polysulfide, and provide large pore volume for sulfur impregnation. As a cathode material for Li-S batteries, the S-TTCN composite with 71 wt% sulfur content delivers high reversible capacity, good cycling performance as well as excellent rate capabilities.