title: Densely charged polyelectrolyte-stuffed nanochannel arrays for power generation from salinity gradient.
abstract: We devised anodized aluminium oxide (AAO) frame-supported polyelectrolytic ion-exchange membranes for the application of electrical power generation systems where salinity differences are present. A series of polyelectrolytic AAO membranes (PAMs) were fabricated as a function of concentration of monomers and cross-linkers. Of the ion-selective PAMs as made, the membranes from the most concentrated monomers and cross-linkers, C-PAM100 and A-PAM100, showed the highest area resistances and permselectivities (the resistances were 4.9 and 2.9 Ω · cm(2), the permseletivities for C-PAM100 and A-PAM100 were 99 and 89%, respectively). The measured resistances and permselectivities allowed the power density to be estimated for C-PAM100 and A-PAM100, 3.5 W/m(2), and experimentally obtained power density using a reverse electrodialysis (RED) stack was 17.3 mW/m(2). In addition, we investigated the influence of an AAO framework on a membrane resistance by comparing the PAMs with polyelectrolyte-stuffed capillaries, revealing that the resistance of the PAM has plenty of potential to be further reduced by optimizing the AAO pore spaces.
authors.affiliation: Department of Chemistry, Seoul National University, Seoul 08826, Korea.
authors.forename: Su Hong
authors.initials: SH
authors.lastname: Kwak
authors.affiliation: Department of Chemistry, Seoul National University, Seoul 08826, Korea.
authors.forename: Seung-Ryong
authors.initials: SR
authors.lastname: Kwon
authors.affiliation: Department of Chemistry, Seoul National University, Seoul 08826, Korea.
authors.forename: Seol
authors.initials: S
authors.lastname: Baek
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea.
authors.forename: Seung-Min
authors.initials: SM
authors.lastname: Lim
authors.affiliation: Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea.
authors.forename: Young-Chang
authors.initials: YC
authors.lastname: Joo
authors.affiliation: Department of Chemistry, Seoul National University, Seoul 08826, Korea.|Advanced Institutes of Convergence Technology, Suwon-Si, Gyeonggi-do 16229, Korea.
authors.forename: Taek Dong
authors.initials: TD
authors.lastname: Chung