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ChemInform Abstract: Electrochemical and Spectroelectrochemical Properties of SnO2 and SnO2/Mo Transparent Electrodes with High Ion-Storage Capacity.

✍ Scribed by U. O. KRASOVEC; B. OREL; S. HOCEVAR; I. MUSEVIC

Publisher
John Wiley and Sons
Year
2010
Weight
38 KB
Volume
29
Category
Article
ISSN
0931-7597

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✦ Synopsis

Electrochemical and Spectroelectrochemical Properties of SnO 2 and SnO 2 /Mo Transparent Electrodes with High Ion-Storage Capacity.

-Thin SnO 2 and SnO 2 /Mo (2:1 and 1:1) films, deposited by dip coating using the sol-gel route, exhibit an ion-storage capacity of 20 to 30 mC/cm 2 and weak cathodic electrochromism. Characterization of films heat treated for 5 min at 500 β€’ C by BET, XRD, and IR measurements reveal a nanocrystalline cassiterite structure with a grain size of β‰ˆ30 Γ… and a surface area of 60 to 70 m 2 /g. The coloring/bleaching changes of 10 to 15% for SnO 2 /Mo (1:1), which accompany the Li + insertion/extraction processes, further decrease for SnO 2 /Mo (2:1) films. Two different redox processes Sn 4+ /Sn 2+ and Mo 6+ /Mo 5+ are confirmed by low-scan-rate CV and ex situ IR spectroelectrochemical measurements. Due to their low coloring efficiency, heat treated SnO 2 /Mo (2:1) films, which contain Broensted acid sites, are promising as counterelectrodes in EC devices with light reflective modulation. -(KRASOVEC, U. O.;

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