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

Author:
Song, Yaochen, Liao, Jiaxuan, Chen, Cheng, Yang, Jian, Chen, Jinchen, Gong, Feng, Wang, Sizhe, Xu, Ziqiang, Wu, Mengqiang
Source:
Carbon 2019 v.142 pp. 697-706
ISSN:
0008-6223
Subject:
anodes, batteries, electrochemistry, graphene, hot water treatment, lithium, nanowires, porous media, surface area
Abstract:
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.
Agid:
6103190