Ovonic Hydrogen Systems LLC

Melanie Reinhout

Stanford R Ovshinsky

Michael A Fetcenko

Kwo Young

Taihei Ouchi

Feng Li

Jun Su Im

A BCC phase hydrogen storage alloy capable of storing approximately 4.0 wt. % hydrogen and delivering reversibly up to 3.0 wt. % hydrogen at temperatures up to 110&#xb0; C. The hydrogen storage alloys also possess excellent kinetics whereby up to 80% of the hydrogen storage capacity of the hydrogen storage alloy may be reached in 30 seconds and 80% of the total hydrogen storage capacity may be desorbed from the hydrogen storage alloy in 90 seconds. The hydrogen storage alloys also have excellent stability which provides for long cycle life.

Hydrogen storage materials having excellent kinetics, capacity, and cycle stability

A hydrogen storage composite material having a Mg&#x2014;Ni based alloy with a coating of a catalytically active metal deposited on at least a portion of a surface of said Mg&#x2014;Ni based alloy. The coating is less than about 200 angstroms thick and preferably is formed from iron or palladium. The composite material is capable of adsorbing at least 3 weight percent hydrogen and desorbing at least 1 weight percent hydrogen at 30&#xb0; C. The Mg&#x2014;Ni based alloy has a microstructure including both a Mg-rich phase and a Ni-rich phase, micro-tubes having an inner core of Ni-rich material surrounded by a sheathing of Mg-rich material, amorphous structural regions and microcrystalline structural regions.

Mg&#x2014;Ni hydrogen storage composite having high storage capacity and excellent room temperature kinetics

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Shelby Township, MI, United States of America

Melanie Reinhout