TY - JOUR
AU - Thomas J Richardson
AU - Jonathan L Slack
AU - Robert D Armitage
AU - Robert Kostecki
AU - Baker Farangis
AU - Michael D Rubin
AB - <p>An electrochromic mirror electrode based on reversible uptake of hydrogen in nickel magnesium alloy films is reported. Thin, magnesium-rich Ni-Mg films prepared on glass substrates by cosputtering from Ni and Mg targets are mirror-like in appearance and have low visible transmittance. Upon exposure to hydrogen gas or on cathodic polarization in alkaline electrolyte, the films take up hydrogen and become transparent. When hydrogen is removed, the mirror properties are recovered. The transition is believed to result from reversible formation of Mg<sub>2</sub>NiH<sub>4</sub> and MgH<sub>2</sub>. A thin overlayer of palladium was found to enhance the kinetics of hydrogen insertion and extraction, and to protect the metal surface against oxidation.</p>
BT - Applied Physics Letters
C1 - <p>Windows and Daylighting Group</p>
C2 - LBNL-47180
DA - 05/2001
DO - 10.1063/1.1371959 
IS - 20
LA - eng
M1 - 20
N2 - <p>An electrochromic mirror electrode based on reversible uptake of hydrogen in nickel magnesium alloy films is reported. Thin, magnesium-rich Ni-Mg films prepared on glass substrates by cosputtering from Ni and Mg targets are mirror-like in appearance and have low visible transmittance. Upon exposure to hydrogen gas or on cathodic polarization in alkaline electrolyte, the films take up hydrogen and become transparent. When hydrogen is removed, the mirror properties are recovered. The transition is believed to result from reversible formation of Mg<sub>2</sub>NiH<sub>4</sub> and MgH<sub>2</sub>. A thin overlayer of palladium was found to enhance the kinetics of hydrogen insertion and extraction, and to protect the metal surface against oxidation.</p>
PY - 2001
SP - 3047
EP - 3049
T2 - Applied Physics Letters
TI - Switchable Mirrors Based on Nickel-Magnesium Films
VL - 78
ER -