Chapter 12

Vanadium Redox Flow Batteries

Christian Doetsch
Jens Burfeind    Fraunhofer Institute for Environmental, Safety, and Energy Technology UMSICHT, Oberhausen, Germany

Abstract

A redox flow battery (RFB) is a special type of electrochemical storage device. Electric energy is stored in electrolytes which are in the form of bulk fluids stored in two vessels. Power conversion is realized in a stack, made of electrodes, membranes, and bipolar plates. In contrast to conventional lead–acid or lithium-ion batteries, the energy conversion unit and energy storage unit are separate devices. From this point of view RFBs are more like reversible fuel cells in that the stack is the power conversion unit and is built in a filter press design; or, compared ...

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