The structure transformation and electrochemical mechanism of cathode material Li_0.86V_0.8O₂
by Fang Hu; Fenghui Gong; Fang Wang; Yinling Jin; Xiang Wu
International Journal of Nanomanufacturing (IJNM), Vol. 12, No. 3/4, 2016

Abstract: Li_0.86V_0.8O₂ cathode materials were prepared by a simple hydrothermal route. The results showed the as-obtained product had a layered hexagonal structure with the Li/V site disorder. The electrochemical tests in the rechargeable lithium batteries presented a capacity fading during the cycling. The crystal structure and local structure of the material during the cycles were also studied by X-ray diffraction and infrared spectrum, which demonstrated the capacity fading during the electrochemical cycling could be attributed to small irreversible structure change in the first charging process, and the loss of the first discharge can be assigned to the short-range disorder of V ions in the oxygen layers.

Online publication date: Fri, 23-Sep-2016

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