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. 2012 Jun 19;2(2):275-306.
doi: 10.3390/membranes2020275.

Membranes for Redox Flow Battery Applications

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Free PMC article

Membranes for Redox Flow Battery Applications

Helen Prifti et al. Membranes (Basel). .
Free PMC article

Abstract

The need for large scale energy storage has become a priority to integrate renewable energy sources into the electricity grid. Redox flow batteries are considered the best option to store electricity from medium to large scale applications. However, the current high cost of redox flow batteries impedes the wide spread adoption of this technology. The membrane is a critical component of redox flow batteries as it determines the performance as well as the economic viability of the batteries. The membrane acts as a separator to prevent cross-mixing of the positive and negative electrolytes, while still allowing the transport of ions to complete the circuit during the passage of current. An ideal membrane should have high ionic conductivity, low water intake and excellent chemical and thermal stability as well as good ionic exchange capacity. Developing a low cost, chemically stable membrane for redox flow cell batteries has been a major focus for many groups around the world in recent years. This paper reviews the research work on membranes for redox flow batteries, in particular for the all-vanadium redox flow battery which has received the most attention.

Figures

Figure 1
Figure 1
Schematic of a Vanadium redox flow battery (Adapted from [2]).
Figure 2
Figure 2
Schematic representation of an ion exchange process.
Scheme 1
Scheme 1
Structure of the precursor of perfluorinated ion exchange membranes [31].
Figure 3
Figure 3
Schematic showing water transfer test cell (Adapted from [15])
Figure 4
Figure 4
Expected movement of water and ions for Anion and Cation exchange membranes (Adapted from [15]).

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References

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