Cycling performance and efficiency of sulfonated poly(sulfone) membranes in vanadium redox flow batteries
Cycling performance and efficiency of sulfonated poly(sulfone) membranes in vanadium redox flow batteries
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DOI：
10.1016/j.elecom.2010.09.018
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发表时间：
2010-11-01
影响因子：
5.4
通讯作者：
Hickner, Michael A.
中科院分区：
文献类型：
--
作者：
Kim, Soowhan;Yan, Jingling;Hickner, Michael A.
作为离子交换膜的替代品，将廉价的市售Radel聚合物磺化，制成薄膜，并评价其在钒氧化还原液流电池（VRFB）中的性能。磺化Radel（S-Radel）膜显示VO（2+）离子的渗透率（2.07 x 10（-7）cm（2）/min）比Nafion 117（1.29 x 10（-6）cm（2）/min）低近一个数量级，从而获得更好的库仑效率（50 mA/cm（2）时为-98% vs. 95%）和更低的每次循环容量损失。尽管S-Radel膜具有略高的膜电阻，但具有S-Radel膜的VRFB的能量效率与Nafion的能量效率相当，因为其更好的库仑效率由更低的钒离子交叉产生。S-Radel膜在长达40次循环时表现出良好的性能，但在随后的循环中观察到性能下降，这可能是膜降解的结果。出版社：Elsevier BM
As an alternative to Nafion (R) ion exchange membrane, an inexpensive commercially-available Radel (R) 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 VO(2+) ions (2.07 x 10(-7) cm(2)/min), compared to Nafion 117 (1.29 x 10(-6) cm(2)/min), resulting in better coulombic efficiency (-98% vs. 95% at 50 mA/cm(2)) 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. Published by Elsevier BM.