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

• Main Authors: Li Guohua, Kim Seungjoo, Du Guodong, Guo Zaiping, Wang Shiquan, Li Li, Jiang Xueya, Feng Chuanqi
• Format: Article
• Language: English
• Published: SpringerOpen 2010-01-01
• Series: Nanoscale Research Letters
• Subjects: Tungsten disulfide; Chemical synthesis; Electrochemical properties; Electrode materials; Hydrothermal method
• Online Access: http://dx.doi.org/10.1007/s11671-010-9642-x

<p>Abstract</p> <p>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 <it>n</it>-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^&#8722;1 in a voltage range of 0.01&#8211;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.</p>