纳米复合材料
反向电渗析
化学工程
碳纳米管
材料科学
膜
离子交换
电渗析
电解质
离子
纳米技术
化学
电极
有机化学
生物化学
物理化学
工程类
作者
Haeun Kim,Dong-Hyun Kim,Haeun Seo,Hye-Yeong Park,Jiyeon Choi,Han‐Ki Kim,Jung Joon Yoo,Young‐Woo Choi,Heesu Yang,Sang‐Chae Jeon,Yeon‐Gil Jung,SeungCheol Yang
标识
DOI:10.1016/j.memsci.2022.120568
摘要
The harvesting salinity gradient power of reverse electrodialysis is mainly derived from ion-exchange membranes (IEMs). Among IEMs for the assembly of reverse electrodialysis stacks, pore-filling ion exchange membranes (PIEMs) and nanocomposite IEMs have been considered for high performance. In our study, we fabricated multiwall carbon nanotube (MWCNT) nanocomposite PIEMs, in which nanocomposite IEM and PIEM were hybridized by a simple impregnation process using an aqueous MWCNT solution. The MWCNT composition in the PIEM could be precisely controlled by the impregnation times and MWCNT concentration in the solution. Additionally, the MWCNTs in the PIEMs were homogenously dispersed without any aggregation. The ion exchange capacities and permselectivities of the MWCNT nanocomposite PIEMs increased with increasing MWCNT content in the PIEMs due to the formation of an optimized ion pathway by reconstruction of the ion-conducting moiety in the electrolyte polymer by hydrophobic MWCNTs. The open-circuit voltages, currents, and power densities of the reverse electrodialysis stacks made with MWCNT nanocomposite IEMs were better than those of PIEMs without MWCNTs, indicating improved performance. This improvement originated from the high ion exchange capacities and permselectivities of the MWCNT nanocomposite PIEMs.
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