TY - JOUR
T1 - Cycling performance and efficiency of sulfonated poly(sulfone) membranes in vanadium redox flow batteries
AU - Kim, Soowhan
AU - Yan, Jingling
AU - Schwenzer, Birgit
AU - Zhang, Jianlu
AU - Li, Liyu
AU - Liu, Jun
AU - Yang, Zhenguo
AU - Hickner, Michael A.
N1 - Funding Information:
The work is supported by the Office of Electricity (OE Delivery & Energy Reliability (OE), U.S. Department of Energy (DOE) under contract DE-AC05-76RL01830 . M. A. Hickner thanks Solvay Advanced Polymers for the donation of Radel polymer.
PY - 2010/11
Y1 - 2010/11
N2 - As an alternative to Nafion® ion exchange membrane, an inexpensive commercially-available Radel® polymer was sulfonated, fabricated into a thin membrane, and evaluated for its performance in a vanadium redox flow battery (VRFB). The sulfonated Radel (S-Radel) membrane showed almost an order of magnitude lower permeability of VO2+ ions (2.07 × 10 -7 cm2/min), compared to Nafion 117 (1.29 × 10 -6 cm2/min), resulting in better coulombic efficiency (~ 98% vs. 95% at 50 mA/cm2) and lower capacity loss per cycle. Even though the S-Radel membrane had a slightly higher membrane resistance, the energy efficiency of the VRFB with the S-Radel membrane was comparable to that of Nafion because of its better coulombic efficiency resulting from the lower vanadium ion crossover. The S-Radel membrane exhibited good performance up to 40 cycles, but a decline in performance at later cycles was observed, likely as a result of membrane degradation.
AB - As an alternative to Nafion® ion exchange membrane, an inexpensive commercially-available Radel® polymer was sulfonated, fabricated into a thin membrane, and evaluated for its performance in a vanadium redox flow battery (VRFB). The sulfonated Radel (S-Radel) membrane showed almost an order of magnitude lower permeability of VO2+ ions (2.07 × 10 -7 cm2/min), compared to Nafion 117 (1.29 × 10 -6 cm2/min), resulting in better coulombic efficiency (~ 98% vs. 95% at 50 mA/cm2) and lower capacity loss per cycle. Even though the S-Radel membrane had a slightly higher membrane resistance, the energy efficiency of the VRFB with the S-Radel membrane was comparable to that of Nafion because of its better coulombic efficiency resulting from the lower vanadium ion crossover. The S-Radel membrane exhibited good performance up to 40 cycles, but a decline in performance at later cycles was observed, likely as a result of membrane degradation.
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U2 - 10.1016/j.elecom.2010.09.018
DO - 10.1016/j.elecom.2010.09.018
M3 - Article
AN - SCOPUS:78049296471
SN - 1388-2481
VL - 12
SP - 1650
EP - 1653
JO - Electrochemistry Communications
JF - Electrochemistry Communications
IS - 11
ER -
