title: A rechargeable hydrogen battery based on Ru catalysis.
abstract: Apart from energy generation, the storage and liberation of energy are among the major problems in establishing a sustainable energy supply chain. Herein we report the development of a rechargeable H2 battery which is based on the principle of the Ru-catalyzed hydrogenation of CO2 to formic acid (charging process) and the Ru-catalyzed decomposition of formic acid to CO2 and H2 (discharging process). Both processes are driven by the same catalyst at elevated temperature either under pressure (charging process) or pressure-free conditions (discharging process). Up to five charging-discharging cycles were performed without decrease of storage capacity. The resulting CO2/H2 mixture is free of CO and can be employed directly in fuel-cell technology.
authors.affiliation: Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart (Germany).
authors.forename: Shih-Fan
authors.initials: SF
authors.lastname: Hsu
authors.forename: Susanne
authors.initials: S
authors.lastname: Rommel
authors.forename: Philipp
authors.initials: P
authors.lastname: Eversfield
authors.forename: Keven
authors.initials: K
authors.lastname: Muller
authors.forename: Elias
authors.initials: E
authors.lastname: Klemm
authors.forename: Werner R
authors.initials: WR
authors.lastname: Thiel
authors.forename: Bernd
authors.initials: B
authors.lastname: Plietker
keywords: Ru catalysis; batteries; carbon dioxide; energy; hydrogenation