%V 329
%A H. Junoh
%A N. Awang
%A S.N.A. Ahmad
%A M. Azhar
%A J. Jaafar
%A N.A.H.M. Nordin
%A A.F. Ismail
%A M.R. Qtaishat
%A T. Matsuura
%A M.H.D. Othman
%A M.A. Rahman
%A A.M. Zainoodin
%T Contribution of zeolitic imidazolate framework-8 in improving the performance of polymer electrolyte membrane for direct methanol fuel cell
%R 10.1016/j.jssc.2023.124395
%D 2024
%L scholars20277
%J Journal of Solid State Chemistry
%O cited By 1
%X Introducing ZIF-8 into the PES-cSMM membranes played a pivotal role in the development of proton-conducting pathways and an effective methanol barrier. We employed dry-wet phase inversion techniques to fabricate PES-cSMM, finding that a 3 wt cSMM content yielded optimal results. The resulting PES-cSMM exhibits impressive performance, with a 38 higher selectivity and a 95 greater methanol barrier compared to Nafion® 117. The imidazole-N-H linker in the terminal PES-cSMM/ZIF-8 promotes proton transport through a hydrogen bond chain, while the hydrophobic backbone acts as an effective methanol filter. As a result, PES-cSMM/ZIF-8 boasts a 13-fold higher water uptake than Nafion® 117 and achieves a 99 improvement in methanol sieving performance, a highly promising breakthrough for DMFC systems. Proton conductivity for the PES-cSMM/ZIF-8 immersion membrane reaches 19.5 � 10-3 Scm-1, comparable to Nafion® 117, which is 20.4 � 10-3 Scm-1. The structural flexibility of ZIF-8 within PES-cSMM facilitates efficient proton conduction, while the ZIF-8 cage acts as a robust methanol barrier. Computational analysis revealed covalent bonding within the PES-cSMM system. We characterized the chemical interactions in PES-cSMM/ZIF-8 using topology analysis, specifically the Atom in Molecules/Non-covalent analysis (AIM/NCI) technique. © 2023 Elsevier Inc.
%K Direct methanol fuel cells (DMFC); Hydrogen bonds; Methanol; Methanol fuels; Polyelectrolytes; Proton exchange membrane fuel cells (PEMFC), Direct-methanol fuel cells; Methanol barriers; Methanol permeability; Nafion 117; PEM; Performance; Polymer electrolyte membranes; Porous membranes; Proton conducting; Zeolitic imidazolate framework-8, Proton conductivity