01524nas a2200157   4500008004100000050001500041245011400056210006900170260003600239490000600275520094200281100001901223700002401242700002701266856007301293       2008                        eng d  aLBNL-1089E00aElectrochromically switched, gas-reservoir metal hydride devices with application to energy-efficient windows0 aElectrochromically switched gasreservoir metal hydride devices w  aEindhoven, Netherlandsc08/20030 v13 a<p>Proof-of-principle gas-reservoir MnNiMg electrochromic mirror devices have been investigated. In contrast to conventional electrochromic approaches, hydrogen is stored (at low concentration) in the gas volume between glass panes of the insulated glass units (IGUs). The elimination of a solid state ion storage layer simplifies the layer stack, enhances overall transmission, and reduces cost. The cyclic switching properties were demonstrated and system durability improved with the incorporation a thin Zr barrier layer between the MnNiMg layer and the Pd catalyst. Addition of 9% silver to the palladium catalyst further improved system durability. About 100 full cycles have been demonstrated before devices slow considerably. Degradation of device performance appears to be related to Pd catalyst mobility, rather than delamination or metal layer oxidation issues originally presumed likely to present significant challenges.</p>1 aAnders, André1 aSlack, Jonathan, L.1 aRichardson, Thomas, J.  uhttps://facades.lbl.gov/publications/electrochromically-switched-gas