Pore-filled anion-exchange membranes for non-aqueous redox flow batteries with dual-metal-complex redox shuttles
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- 作者：Do-Hyeong Kim ; Seok-Jun Seo ; Myung-Jin Lee ; Jin-Soo Park ; Seung-Hyeon Moon ; Yong Soo Kang ; Young-Woo Choi ; Moon-Sung Kang
- 关键词：Pore-filled anion-exchange membranes ; Redox flow battery ; Non-aqueous media ; Dual-metal complex redox electrolyte ; Crossover
- 刊名：Journal of Membrane Science
- 出版年：15 March, 2014
- 年：2014
- 卷：454
- 期：Complete
- 页码：44-50
- 全文大小：2887 K
文摘
Pore-filled anion-exchange membranes (PFAEMs) were synthesized using thin porous polymer substrates for non-aqueous redox flow battery (RFB) applications. The PFAEMs which have a thickness of about 25 渭m exhibited high ion conductivity and selectivity in both aqueous and non-aqueous media. In addition, they showed excellent mechanical properties as well as dimensional stability in a non-aqueous environment. The non-aqueous RFB experiments utilizing novel Fe/Ni dual-metal complex redox electrolyte resulted in the respectable energy efficiencies (i.e. 87.3% and 77.2% in non-flowing and flowing cells, respectively) much higher than those of previous papers where other non-aqueous redox electrolytes were used. The PFAEMs showed much better ion selectivity in non-aqueous medium compared to that of the commercial membrane due to the relatively low swellability. The results demonstrated that the charge-discharge performances were largely enhanced by the mitigated crossover of metal complex as well as the low mass transport resistance through the membrane.