Sulfonated poly (ether ether ketone)-based proton exchange membranes for vanadium redox battery applications
Sulfonated poly (ether ether ketone)-based proton exchange membranes for vanadium redox battery applications
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DOI：
10.1016/j.memsci.2013.09.024
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发表时间：
2014-01
影响因子：
9.5
通讯作者：
Suminto Winardi;S. Raghu;M. O. Oo;Q. Yan;N. Wai;T. Lim;T. Lim;M. Skyllas-Kazacos
中科院分区：
文献类型：
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作者：
Suminto Winardi;S. Raghu;M. O. Oo;Q. Yan;N. Wai;T. Lim;T. Lim;M. Skyllas-Kazacos
采用流延法制备了低成本的磺化聚醚醚酮膜，并对磺化条件进行了优化。优化的SPEEK膜在G1钒氧化还原电池（VRB）中进行了初步测试，然后在G2溴化钒氧化还原液流电池（V/Br）中进行了评估，并将性能与Nafion 117进行了比较。从G1 VRB性能测试中发现，该膜的能量效率为77%，略高于Nafion 117，其在电流密度40 mA cm−2时的能量效率为73%。对于第一次，SPEEK膜在G2 V/Br在两个不同的溴络合剂的比例进行了评估，并从测量的电池效率的性能进行了评估。在4 mA cm−2时，在0.19 M MEM和0.56 M MEP存在下使用SPEEK的最佳能量效率为76%，而使用Nafion 117获得的最佳能量效率为75%。与Nafion 117类似，SPEEK在高氧化性电解质中也具有优异的化学稳定性。因此，SPEEK膜似乎是G1和G2 VRB应用的有前途的候选者。
Low cost sulfonated poly (ether ether ketone) membranes have been successfully prepared and optimized at various sulfonation conditions by casting method for vanadium redox battery applications. The optimized SPEEK membrane was initially tested in the G1 vanadium redox battery (VRB) before being evaluated in the G2 vanadium bromide redox flow battery (V/Br), and the performance was compared to that of Nafion 117. From the G1 VRB performance tests, the energy efficiency of the membrane was found to be 77%, slightly higher than Nafion 117 which gave 73% at current density 40 mA cm−2. For the first time, the SPEEK membrane was evaluated in the G2 V/Br at two different ratios of bromine complexing agents and the performance was assessed from the measured cell efficiencies. At 4 mA cm−2, the optimum energy efficiency was 76% using SPEEK in the presence of 0.19 M MEM and 0.56 M MEP, when compared to 75% obtained with Nafion 117. Similar to Nafion 117, SPEEK also exhibits excellent chemical stability in the highly oxidizing electrolytes. The SPEEK membrane thus appears to be a promising candidate for both G1 and G2 VRB applications.