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Choosing the metal oxide for an electro-chemo-mechanical actuator working body.
- Source :
-
Solid State Ionics . Jun2022, Vol. 379, pN.PAG-N.PAG. 1p. - Publication Year :
- 2022
-
Abstract
- The term "electro-chemo-mechanical (ECM) effect" describes mechanical deformation driven by an electrochemical reaction. Recently, an all-solid-state ECM device operating at room temperature was demonstrated. The device comprised a 20 mol% Gd-doped ceria (20GDC) self-supported electrolyte membrane placed between two mixed ionic/electronic conducting (MIEC) working bodies (WBs) constructed with TiO x /20GDC nanocomposites. Actuation derived from volume change occurring upon oxidation/reduction of the WB. This raised the question of whether or not metal oxides other than TiO x could be valuable components in MIEC nanocomposites functioning as WBs in ECM actuation. Here we examine the microstructure, crystal phase, oxidation state, chemical composition and ECM functionality of V-, Nb-, Mo-, Cu- and Ag-oxide/20GDC composite WBs prepared by co-sputtering. Of these, only the V-based composite was shown to be suitable for ECM actuation. According to X-ray absorption spectroscopy, the composition of the nanocomposite corresponds to VO x /20GDC. Electrical characterization suggests that the formation of several coexisting VO x nano-oxide phases is responsible for the longer response times as compared to TiO x /20GDC WBs. ECM actuation demonstrated in the V-based system does indicate that composite WB based ECM is not unique to Ti and that this type of actuation constitutes a significant contribution to development of microelectromechanical systems. • nanocrystalline composites of V-, Nb-, Mo-, Cu- and Ag-oxide/20GDC were prepared. • structure, crystal phase, oxidation state, composition and ECM functionality examined. • V-based composite was shown to be suitable for ECM actuation. • composition of the nanocomposite corresponds to VO x /20GDC. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01672738
- Volume :
- 379
- Database :
- Academic Search Index
- Journal :
- Solid State Ionics
- Publication Type :
- Academic Journal
- Accession number :
- 156268315
- Full Text :
- https://doi.org/10.1016/j.ssi.2022.115913