Redox flow battery concept

The redox flow battery (RFB) concept was first proposed by L. H. Thaller at the NASA Lewis Research Center, Cleveland, Since then, it... 

Moro LMS (2013) Trends in redox flow battery technology and project REDOX2015. 2013 International conference on new concepts in smart cities fostering public and private alliances (SmartMILE). IEEE, Spain, pp 1 ... 

Redox flow batteries have been studied for almost 40 years, ever since the first concept reported by Thaller in 1976 [6]. NASA-Lewis Research Centre developed the first complete redox energy storage system based on the Fe(III)/Fe(II) and Cr(III)/Cr (II) redox couples as the positive and negative active species, respectively. Since then, redox flow batteries have been significantly developed, leading to various systems. Generally, two major principles can classify RFBs. 

An extension of hybrid redox flow batteries is the double hybrid soluble lead-acid flow batteries (SLFBs) where deposition and dissolution of redox active compounds are involved in both high potential and low potential electrode reactions. Fletcher et al. explored the concept of SLFBs in 2004 [112], and have reported their systematic study in a series of papers [113-120]. The electrode reactions of a SLFB are ... 

Anode — Electrode where -> oxidation occurs and electrons flow from electrolyte to electrode. At the other electrode, which is called a - cathode, electrons flow from electrode to electrolyte. It follows that in a -> battery, the anode is the negative electrode. In - electrolysis, to the contrary, the anode is the positive electrode. Note that the concepts of anode and cathode are related only to the direction of electron flow, not to the polarity of the electrodes. The terms anode and cathode as well as anion , cation electrolyte etc. were introduced by - Faraday, who considered that anions migrated toward the anode, while cations migrated toward the cathode (see also - Whewell). However, it should be noted that the redox species, which gives electrons to the anode, is not necessarily an anion. 

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