Synthesis of TiNb6O17/C composite with enhanced rate capability for lithium ion batteries. Issue 15 (15th November 2016)

• Record Type: Journal Article
• Authors: Mao, Wutao; Bao, Keyan; Wang, Lin; Liu, Guangyin; Xie, Haiquan; Zhang, Ruixue; Zheng, Shaolong; Guo, Jiali; Li, Beibei; Wang, Weibo
• Is Part Of: Ceramics international. Volume 42:Issue 15(2016)
• Page Start: 16935
• Page End: 16940
• Publication Date: 2016-11-15
• Subjects: Lithium ion battery -- TiNb6O17/C composite -- Solid-state reaction -- Electrochemical property; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.07.193
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: TiNb6 O17 /C composites were obtained via a facile solid-state reaction with TiO2, Nb2 O5 and glucose as the starting materials. The lattice structure and morphology of the composite were investigated by X-ray diffraction, scanning electronic microscopy and transmission electron microscopy. The electrochemical properties were characterized by rate charge/discharge measurements and cyclic voltammetry. Electrochemical measurements demonstrate that the TiNb6 O17 /C composite exhibits electrochemical properties superior to those of pure TiNb6 O17, especially at high current rates. The initial discharge capacities of TiNb6 O17 /C are 239, 225.1 and 199.8 mAh g −1 at 1, 5 and 10 C, respectively. Even after 500 cycles at 10 C, the capacity still remains 165.1 mAh g −1, while the capacity of TiNb6 O17 is only 74.8 mAh g −1 . The excellent electrochemical performance of TiNb6 O17 /C is attributed to the improvement of the electrical conductivity resulting from carbon coating.