Journal ArticleDOI
Optical switching properties of RCo2-type alloy hydride based solid state device
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TLDR
In this article, the optical switching properties of a solid state device based on Ho0.6Mm0.4Co2 (HMC) alloy thin film as a switching active layer, water pretreated Nafion membrane as a solid electrolyte, and a transparent conducting indium tin oxide (ITO) as a counterelectrode are investigated.Abstract:
The optical switching properties of a solid state device based on Ho0.6Mm0.4Co2 (HMC) alloy thin film as a switching active layer, water pretreated Nafion membrane as a solid electrolyte, and a transparent conducting indium tin oxide (ITO) as a counterelectrode are investigated. The device is simple and has a reduced layer sequence of HMC/Pd/Nafion/ITO. The reversible optical switching of this device has been studied during electrochemical galvanostatic charging-discharging as well as cyclic voltammetric measurements. Further, the optical switching durability of the device has been tested by repeated electrochemical hydrogenation-dehydrogenation, and the variations in the optical switching properties are discussed. The special characteristic of the device is that it can reversibly switch between a metallic reflecting state and a semiconducting transparent state by a small reversible applied current/voltage indicating the potential substitution for conventional electrochromic devices.read more
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Journal ArticleDOI
Correlation of structural differences between Nafion/polyaniline and Nafion/polypyrrole composite membranes and observed transport properties
TL;DR: In this paper, the performance of selected polypyrrole/Nafion composite membranes is tested in a static vanadium redox cell and the results show that polyaniline and polypryrole interact differently with Nafion.
Journal ArticleDOI
Electromagnetic wave propagation in spatially homogeneous yet smoothly time-varying dielectric media
Armen G. Hayrapetyan,Jörg B. Götte,K.K. Grigoryan,Stephan Fritzsche,Stephan Fritzsche,R.G. Petrosyan +5 more
TL;DR: In this paper, the propagation and transformation of electromagnetic waves through spatially homogeneous yet smoothly time-dependent media within the framework of classical electrodynamics is explored. But the authors do not consider the effect of the time-varying permittivity of the media.
Book ChapterDOI
Hydrogen Storage Materials
TL;DR: In this paper, metal hydrides have been extensively studied for their hydrogen storage capacity, reversibility, kinetics and cyclic stability, and they find applications in Ni-MH (metal hydride) batteries, on-board energy supply, hydrogen isotope separation, gas purification, heat pumps, sensors and actuators.
Journal ArticleDOI
Density functional calculations of Ti nanoclusters in the metastable Mg-Ti system
TL;DR: Gremaud et al. as mentioned in this paper investigated the microstructure of Mg-Ti-H thin films and found that the formation enthalpy per Ti atom was lowered by up to 0.5
Journal Article
Optical switching of Y-hydride thin film electrodes: a remarkable electrochromic phenomenon.
TL;DR: The optical appearance of yttrium thin film electrodes can be electrochemically switched from mirrorlike to highly transparent by making use of the hydride-forming properties of Y as discussed by the authors.
References
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Book
Handbook of inorganic electrochromic materials
TL;DR: In this paper, a case study on tungsten oxide is presented, where the authors discuss the preparation, structure, and composition of sputter-deposited tungstern oxide films.
Journal ArticleDOI
Yttrium and lanthanum hydride films with switchable optical properties
J. N. Huiberts,R.P. Griessen,J.H. Rector,Rinke J. Wijngaarden,Jan P. Dekker,D.G. de Groot,N.J. Koeman +6 more
TL;DR: In this article, thin films of yttrium and lanthanum with a layer of palladium through which hydrogen can diffuse are used to simulate metal-to-insulator transitions.
Journal ArticleDOI
Switchable mirrors based on nickel–magnesium films
TL;DR: A new type of electrochromic mirror electrode based on reversible uptake of hydrogen in nickel magnesium alloy films is reported in this paper, where a thin overlayer of palladium was found to enhance the kinetics of hydrogen insertion and extraction, and to protect the metal surface against oxidation.
Journal ArticleDOI
Optical switches based on magnesium lanthanide alloy hydrides
TL;DR: In this paper, it was shown that thin layers of palladium coated magnesium lanthanide alloys reversibly go through an optical transition by variation of the hydrogen concentration, just as has recently been shown for pure lanthanides.
Journal ArticleDOI
Optical switching of Mg-rich Mg–Ni alloy thin films
TL;DR: In this article, the optical transmittance of these Mg-rich MgNi thin films in the hydride state is much improved compared with that of Mg2Ni thin film.