Abstract
Mesoporous vanadium oxide thin films have been deposited electrochemically from a water/ethanol solution of vanadyl sulfate and a nonionic polymer surfactant. Aggregates of the polymer surfactant serve as templates that result in the formation of a mesoporous structure. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) indicate the presence of both macroporosity and mesoporosity in the electrodeposited film. Chemochromic behavior of mesoporous vanadium oxide is demonstrated in a palladium/vanadium oxide thin-film device, which colors when exposed to hydrogen gas. A comparison of results with evaporated vanadium oxide reveals that the mesoporous film displays an improved kinetic performance, which is most likely attributable to its highly porous structure. Also, the electrochemical properties have been explored in a lithium-battery configuration. Mesoporous vanadium oxide exhibits a very high lithium storage capacity and greatly enhanced charge-discharge rate. In situ optical measurements show that the film exhibits a multicolor electrochromic effect.
| Original language | American English |
|---|---|
| Pages (from-to) | 223-228 |
| Number of pages | 6 |
| Journal | Solid State Ionics |
| Volume | 165 |
| Issue number | 1-4 |
| DOIs | |
| State | Published - 2003 |
| Event | Fifth International Meeting on Electrochromism - Golden, CO, United States Duration: 5 Aug 2002 → 9 Aug 2002 |
NREL Publication Number
- NREL/JA-590-35470
Keywords
- Chemochromic
- Electrochromic
- Electrodeposition
- Mesoporous
- Vanadium oxide