Robert Hahn, Oren Rosenfeld, Chaim Markheim, Andreas Schamel
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Lifetime of the Gas Evolution Electrode of the Zn–H2 Storage System
A novel electrically chargeable galvanic system is presented that efficiently stores energy in the form of zinc and releases hydrogen and electricity upon discharge. In this concept, oxygen is released at the gas electrode during charging, and zinc oxide is reduced to metallic zinc at the counter electrode. When the cell is discharged on demand, the zinc is converted back to zinc oxide, but the water is reduced at the gas electrode to produce hydrogen. The system can therefore be used not only to store electricity—in combination with a fuel cell—but also as an on‐demand hydrogen generator, for example, for industrial use. When used as an electrical storage system, the overall round‐trip efficiency can approach 50%, significantly exceeding the efficiency of alternative power‐to‐gas technologies. There are no hydrogen storage or transportation losses. The electrochemical cell combines two breakthrough technologies: a bifunctional catalyst for hydrogen and oxygen evolution reaction that survives thousands of oxidation and reduction cycles, and a dendrite‐free deposition of thick, high‐capacity zinc coatings that can be cycled almost indefinitely thanks to pulsed charge current and intelligent electronic control.
期刊介绍:
This journal is only available online from 2011 onwards.
Fuel Cells — From Fundamentals to Systems publishes on all aspects of fuel cells, ranging from their molecular basis to their applications in systems such as power plants, road vehicles and power sources in portables.
Fuel Cells is a platform for scientific exchange in a diverse interdisciplinary field. All related work in
-chemistry-
materials science-
physics-
chemical engineering-
electrical engineering-
mechanical engineering-
is included.
Fuel Cells—From Fundamentals to Systems has an International Editorial Board and Editorial Advisory Board, with each Editor being a renowned expert representing a key discipline in the field from either a distinguished academic institution or one of the globally leading companies.
Fuel Cells—From Fundamentals to Systems is designed to meet the needs of scientists and engineers who are actively working in the field. Until now, information on materials, stack technology and system approaches has been dispersed over a number of traditional scientific journals dedicated to classical disciplines such as electrochemistry, materials science or power technology.
Fuel Cells—From Fundamentals to Systems concentrates on the publication of peer-reviewed original research papers and reviews.