Improved Durability of WO3 Nanocomposite Films Using Atomic Layer and Vapor Deposited Coatings

The durability of mesoporous films comprised of tungsten oxide nanoparticles was studied by monitoring their electrochromic performance during extended cycling in lithium perchlorate solution. Standard films rapidly lost charge capacity as nanoparticles detached from the film and were lost to soluti...

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Bibliographic Details
Published inECS electrochemistry letters Vol. 1; no. 5; pp. H24 - H27
Main Authors Li, Chi-Ping, Tenent, Robert C., Dillon, Anne C., Morrish, Rachel M., Wolden, Colin A.
Format Journal Article
LanguageEnglish
Published The Electrochemical Society 01.01.2012
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Summary:The durability of mesoporous films comprised of tungsten oxide nanoparticles was studied by monitoring their electrochromic performance during extended cycling in lithium perchlorate solution. Standard films rapidly lost charge capacity as nanoparticles detached from the film and were lost to solution. This issue was mitigated through the use of protection layers including evaporated LiAlF4 and alumina applied by atomic layer deposition (ALD). Three ALD cycles offered superior protection to 100 nm of LiAlF4, enabling >2500 cycles with no appreciable change in electrochromic performance. Moreover, the addition of these protection layers did not degrade the switching time as evidenced by their transient response to potential step changes.
Bibliography:002206EEL
ISSN:2162-8726
2162-8734
DOI:10.1149/2.002206eel