✦ LIBER ✦

Preparation and electrochemical lithium intercalation of V2O5 porous lump with large surface area

✍ Scribed by Kalyan Adhikary; Shinichi Kikkawa

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 892 KB
Volume: 99
Category: Article
ISSN: 0167-2738
DOI: 10.1016/s0167-2738(97)00268-3

No coin nor oath required. For personal study only.

✦ Synopsis

A porous V O lump with a very large surface area could be prepared by removal of B O from a melt quenched 2 5 2 3 2 21 V O -B O binary mixture of 4:1 molar ratio. The surface area reached 34.75 m g and a very interesting gathering 2 5 2 3 texture of V O tiny needle crystals was observed with a lot of vacant space for electrolyte solvent to soak in. A lithium 2 5 22 rechargeable cell using the porous V O showed superior electrochemical performances with current drain | 400 mA cm 2 5 21

and discharge capacity | 114 mA hr g . Several cycles were carried out between 2 to 4 V limits using the porous samples. However this was not possible when commercially available and only melt quenched V O samples were used. A porous 2 5

sample was discharged to around x 5 0.8 in Li V O through ato ´-phases and cycled in the latter range.

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