Controllable morphologies and electrochemical performances of self-assembled nano-honeycomb WS2 anodes modified by graphene doping for lithium and sodium ion batteries

• Published in: Carbon (New York) 2019-02, Vol.142, p.697-706
• Main Authors: Song, Yaochen, Liao, Jiaxuan, Chen, Cheng, Yang, Jian, Chen, Jinchen, Gong, Feng, Wang, Sizhe, Xu, Ziqiang, Wu, Mengqiang
• Format: Article
• Language: English
• Subjects: Analytical chemistry; Anodes; Batteries; Doping; Electric properties; Graphene; Honeycomb construction; Honeycomb structures; Hybrid structures; Lithium; Morphology; Nanowires; Self-assembly; Semiconductor doping; Sodium-ion batteries
• ISSN: 0008-6223; 1873-3891
• DOI: 10.1016/j.carbon.2018.07.060

Self-assembled nano-honeycomb WS2 modified by graphene doping were prepared by improved one step hydrothermal method. In this hybrid structure, graphene plays a key role of transferring the morphology from the nanowire microporous spheres to graphene-supported nano-honeycomb plane structure, which has the larger the specific surface area and higher conductivity. This anode delivers the superb electrochemical performances of lithium/sodium ion batteries with high specific charge capacity (953.1/522.3 mAh·g−1 at 0.1 A·g−1), long cycling life (more than 350/200 cycles at 1 A·g−1), and high charge/discharge rates (up to 10/5 A·g−1). This nano-honeycomb structure WS2 composite anode with facile hydrothermal process, as well as superb electrochemical performances, makes it attractive for the potential applications in lithium/sodium ion batteries. [Display omitted]