Enhanced cycleability of LiCoO2 coated with vanadium oxides

✍ Scribed by Jae-Won Lee; Sun-Min Park; Hae-Jin Kim

• Book ID: 104025489
• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 873 KB
• Volume: 188
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2008.11.124

✦ Synopsis

Vanadium oxide (V 2 O 5 /V 2 O 5 hydrates) sol-gel coatings on lithium cobalt oxide (LiCoO 2 ) are investigated as a means are prepared to improve the cycleability at a high-charge cut-off voltage. The V 2 O 5 sol was prepared by a melt-quenching method. The crystal structure and morphology of the samples are examined by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The charge and discharge characteristics, including cycleability, are measured at room temperature, and the electrochemical properties of bare and coated LiCoO 2 are compared. Overall, a vanadium oxide coating on LiCoO 2 improves the cycleability at a high-charge cut-off voltage.