Open Access Nano Express

Synthesis and Characterization of Cobalt-Doped WS2 Nanorods for Lithium Battery Applications

Shiquan Wang14, Guohua Li2, Guodong Du3, Li Li1, Xueya Jiang1, Chuanqi Feng1, Zaiping Guo3* and Seungjoo Kim4

Author Affiliations

1 Department of Chemistry, Hubei University, Wuhan, 430062, People’s Republic of China

2 State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou, 310032, People’s Republic of China

3 School of Mechanical, Materials & Mechatronics, Institute for Superconducting & Electronic Materials, Faculty of Engineering, University of Wollongong, Wollongong, NSW, 2522, Australia

4 Institute of NT-IT Fusion Technology, Division of Energy Systems Research, Ajou University, Suwon, 443-749, Republic of Korea

For all author emails, please log on.

Nanoscale Research Letters 2010, 5:1301-1306  doi:10.1007/s11671-010-9642-x

Published: 23 May 2010

Abstract

Cobalt-doped tungsten disulfide nanorods were synthesized by an approach involving exfoliation, intercalation, and the hydrothermal process, using commercial WS2 powder as the precursor and n-butyllithium as the exfoliating reagent. XRD results indicate that the crystal phase of the sample is 2H-WS2. TEM images show that the sample consists of bamboo-like nanorods with a diameter of around 20 nm and a length of about 200 nm. The Co-doped WS2 nanorods exhibit the reversible capacity of 568 mAh g−1 in a voltage range of 0.01–3.0 V versus Li/Li+. As an electrode material for the lithium battery, the Co-doped WS2 nanorods show enhanced charge capacity and cycling stability compared with the raw WS2 powder.

Keywords:
Tungsten disulfide; Chemical synthesis; Electrochemical properties; Electrode materials; Hydrothermal method