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.
Highlights
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
Due to its distinctive layer structure and electronic properties, the inorganic fullerene-like structure of MS2(M = Mo, W) has been attracting considerable attention and has been investigated extensively for various applications
The selected area electron diffraction (SAED) pattern reveals that the raw WS2 consists of single crystals of 2H-WS2
Summary
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. Bamboo-like Co-doped WS2 nanorods were synthesized on a large scale by an approach involving exfoliation–intercalation–hydrothermal treatment, using lamellar tungsten disulfide as the precursor, and the morphology, chemical components, and Raman spectrum are reported. The cobalt-doped WS2 nanorods can reversibly store lithium with a capacity of 568 mAh g-1 over a voltage range of 0.01–3.0 V versus Li/Li?
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