(400b) Polystyrene-Block-Poly(ethylene-ran-butylene)-Block-Polystyrene Triblock Copolymer Separators for a Vanadium-Cerium Redox Flow Battery | AIChE

(400b) Polystyrene-Block-Poly(ethylene-ran-butylene)-Block-Polystyrene Triblock Copolymer Separators for a Vanadium-Cerium Redox Flow Battery

Authors 

Parrondo, J., Washington University in Saint Louis
Ramani, V., Washington University in St. Louis

Polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene
Triblock Copolymer Separators for a Vanadium-cerium Redox Flow Battery

Zhongyang Wang,
Javier Parrondo and Vijay K. Ramani

Department of Energy,
Environmental and Chemical Engineering

Washington
University in Saint Louis

Redox flow batteries (RFBs) are
promising candidates for large-scale energy storage systems since the capacity,
power and energy density parameters can be designed independently and easily
modified even after installation. ADDIN EN.CITE
<EndNote><Cite><Author>Kear</Author><Year>2012</Year><RecNum>109</RecNum><DisplayText><style db-id="rxaveetdnzrfzhezp0s5s5w5ata50z2zv2td">109</key></foreign-keys><ref-type
name="Journal Article">17</ref-type><contributors><authors><author>Gareth
Kear</author><author>Akeel A.
Shah</author><author>Frank C.
Walsh</author></authors></contributors><titles><title>Development
of the all‐vanadium redox flow battery for
energy storage: a review of technological, financial and policy
aspects</title><secondary-title>International Journal of Energy
Research</secondary-title></titles><periodical><full-title>International
Journal of Energy Research</full-title></periodical><pages>1105-1120</pages><volume>36</volume><number>11</number><dates><year>2012</year></dates><urls><related-urls><url>https://onlinelibrary.wiley.com/doi/abs/10.1002/er.1863</url></related-u...1 Original work on the iron/chromium
RFB was performed by NASA researchers in 1970s. ADDIN EN.CITE
<EndNote><Cite><Author>Sum</Author><Year>1985</Year><RecNum>156</RecNum><DisplayText><style Article">17</ref-type><contributors><authors><author>Sum,
E.</author><author>Skyllas-Kazacos,
M.</author></authors></contributors><titles><title>A
study of the V(II)/V(III) redox couple for redox flow cell
applications</title><secondary-title>Journal of Power
Sources</secondary-title></titles><periodical><full-title>Journal
of Power Sources</full-title><abbr-1>J. Power Sources</abbr-1><abbr-2>J
Power
Sources</abbr-2></periodical><pages>179-190</pages><volume>15</volume><number>2</number><dates><year>1985</year><pub-dates><date>1985/06/01</date></pub-dates></dates><isbn>0378-7753</isbn><urls><related-urls><url>http://www.sciencedirect.com/science/article/pii/0378775385800719</url><...(85)80071-9</electronic-resource-num></record></Cite></EndNote>2 Over the past few decades, several
redox couples have been studied for RFB applications: All-vanadium,
all-uranium, iron-vanadium, iron-chromium, zinc-nickel, zinc-cerium, and
zinc-bromine. Among these redox couples, the all-vanadium redox flow battery
(VRFB) has been considered the most reliable RFB system due to its long-life
and mild operating temperature range. Moreover, intermixing of negative and
positive electrolyte does not cause irreversible damage in the VRFB. The
drawbacks of VRFBs include their low standard cell voltage (1.26 V) and the
relatively low solubility of vanadium salts (typically 1.5 M in common acids,
such as sulfuric acid), which limit their specific capacity and energy density.
Besides, hydrocarbon-based membrane separators suffered from oxidative
degradation caused by the vanadium (V) cation. This required the use of
fluorocarbon-based membranes as separators. The expensive vanadium salts and
the high cost of the fluorocarbon-based separators have limited the
commercialization of VRFBs. Alternative redox species / couples could alleviate
some of these issues. By using a polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene-based anion exchange
membrane (AEM)-separator, it is possible to operate “electrode-decoupled” RFBs
with different redox elements at the anode and cathode. The vanadium-cerium
redox flow battery (V-Ce RFB) has relative high cell voltage (Ce4+/Ce3+
has standard potential of 1.44 V vs. SHE compared with V5+/V4+
at 1 V vs. SHE), good reversibility and acceptable energy density. ADDIN EN.CITE <EndNote><Cite><Author>Li</Author><Year>2011</Year><RecNum>155</RecNum><DisplayText><style Hongzhang</author><author>Vankelecom,
Ivo</author></authors></contributors><titles><title>Ion
exchange membranes for vanadium redox flow battery (VRB)
applications</title><secondary-title>Energy &amp; Environmental
Science</secondary-title></titles><pages>1147-1160</pages><volume>4</volume><number>4</number><dates><year>2011</year></dates><publisher>The
Royal Society of
Chemistry</publisher><isbn>1754-5692</isbn><work-type>10.1039/C0EE00770F</work-type><urls><related-urls><url>http://dx.doi.org/10.1039/C0EE00770F</url></related-urls></urls><electro...3

References

 ADDIN EN.REFLIST 1.            Kear
G, Shah AA, Walsh FC. Development of the all‐vanadium redox flow battery for energy storage: a review of
technological, financial and policy aspects. International Journal of Energy Research. 2012;36(11):1105-1120.

2.            Sum E, Skyllas-Kazacos M. A study of
the V(II)/V(III) redox couple for redox flow cell applications. J. Power Sources. 1985/06/01
1985;15(2):179-190.

3.            Li X, Zhang H, Mai Z, Zhang H, Vankelecom
I. Ion exchange membranes for vanadium redox flow battery (VRB) applications. Energy & Environmental Science. 2011;4(4):1147-1160.

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