Abstract
We report on investigations of V2O5 thin film cathodes prepared by pulsed laser deposition and the phase transformations which occur during electrochemical cycling. Our experimental results on PLD-grown, textured V2O5 crystalline films concur with reports in the literature that there is a voltage threshold above which, cycling appears to be completely reversible and below which, cycling appears to be irreversible. Crystalline films discharged beyond the threshold to 2.0 V vs. Li exhibited an immediate and continuous fade in capacity as well as a approximately 90% decrease in XRD peak intensity and a similar decrease in Raman signal intensity in as few as 10 cycles. We have made ω-phase material by both electrochemically discharging virgin, crystalline V2O5 and by further discharging previously cycled films which showed irreversible structural changes.
| Original language | American English |
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| Pages | 373-378 |
| Number of pages | 6 |
| State | Published - 1998 |
| Event | Materials for Electrochemical Energy Storage and Conversion II Batteries, Capacitors and Fuel Cells: Materials Research Society Symposium - Boston, Massachusetts Duration: 1 Dec 1997 → 5 Dec 1997 |
Conference
| Conference | Materials for Electrochemical Energy Storage and Conversion II Batteries, Capacitors and Fuel Cells: Materials Research Society Symposium |
|---|---|
| City | Boston, Massachusetts |
| Period | 1/12/97 → 5/12/97 |
NLR Publication Number
- NREL/CP-590-25596