Crosslinkable sulfonated poly (diallyl-bisphenol ether ether ketone) membranes for vanadium redox flow battery application
Crosslinkable sulfonated poly (diallyl-bisphenol ether ether ketone) membranes for vanadium redox flow battery application
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DOI：
10.1016/j.jpowsour.2012.06.030
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发表时间：
2012-11
影响因子：
9.2
通讯作者：
Hongzhang Zhang;Huamin Zhang;Xianfeng Li;Z. Mai;Wenping Wei;Yun Li
中科院分区：
文献类型：
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作者：
Hongzhang Zhang;Huamin Zhang;Xianfeng Li;Z. Mai;Wenping Wei;Yun Li
制备了具有不同磺化度（DS）的可交联磺化聚（二烯丙基双酚醚醚酮）（SDPEEK）膜，并首次在钒氧化还原液流电池（VFB）应用中进行了研究。 DS 为 80% (SD4-6-100) 的 SDPEEK 膜比目前使用的 Nafion 115 的 VO2+ 离子渗透率低一个数量级（2.4 × 10−8vs. 1.04 × 10−6cm2min−1）。使用 SD4-6-100 膜组装的 VFB 电池表现出更高的库伦效率（在 然而，在相似的能源效率下，与 Nafion 115 相比，其电流消耗（50 mA cm−2）和更长的自放电时间（180 小时与 50 小时）相比。该膜经过900小时的充放电测试后仍保持稳定的性能。为了进一步提高高DSSDPEEK膜的离子选择性，SD5-5-50（DS 100%）膜在紫外线（UV）辐射下进行交联。交联后膜的离子选择性明显提高，表现出更高的库伦效率和能量效率。
Crosslinkable sulfonated poly (diallyl-bisphenol ether ether ketone) (SDPEEK) membranes with different degrees of sulfonation (DS) are prepared and first investigated in vanadium redox flow battery (VFB) application. The SDPEEK membranes with DS of 80% (SD4-6-100) show over an order of magnitude lower permeability of VO2+ions (2.4 × 10−8vs. 1.04 × 10−6cm2min−1) than currently used Nafion 115. The VFB battery assembled with SD4-6-100 membrane exhibits much higher columbic efficiency (98% vs. 92% at 50 mA cm−2) and longer self-discharge time (180 h vs. 50 h) than that of Nafion 115, however, at similar energy efficiency. The membrane keeps a stable performance after 900 h charge–discharge test. In order to further improve the ions selectivity of SDPEEK membranes with high DS, the SD5-5-50 (DS 100%) membrane is crosslinked under ultraviolet (UV) radiation. The ion selectivity of the membrane is improved obviously after crosslinking, as a result, showing much higher columbic efficiency and energy efficiency.