A mini-review on anion exchange membranes for fuel cell applications: Stability issue and addressing strategies

Kordesch, 1995, Environmental impact of fuel cell technology, Chem Rev, 95, 191, 10.1021/cr00033a007 Yan, 2006, Steady state and dynamic performance of proton exchange membrane fuel cells (PEMFCs) under various operating conditions and load changes, J Power Sources, 161, 492, 10.1016/j.jpowsour.2006.03.077 Barbir, 1997, Efficiency and economics of proton exchange membrane (PEM) fuel cells, Int J Hydrogen Energy, 22, 1027, 10.1016/S0360-3199(96)00175-9 Bernardi, 1992, A mathematical model of the solid-polymer-electrolyte fuel cell, J Electrochem Soc, 139, 2477, 10.1149/1.2221251 Mabrouk, 2011, Preparation of new proton exchange membranes using sulfonated poly(ether sulfone) modified by octylamine (SPESOS), Mater Chem Phys, 128, 456, 10.1016/j.matchemphys.2011.03.031 Mabrouk, 2012, Synthesis and characterization of polymer blends of sulfonated polyethersulfone and sulfonated polyethersulfone octylsulfonamide for PEMFC applications, Fuel Cells, 12, 179, 10.1002/fuce.201100051 Mabrouk, 2014, Ion exchange membranes based upon crosslinked sulfonated polyethersulfone for electrochemical applications, J Membr Sci, 452, 263, 10.1016/j.memsci.2013.10.006 Jones, 2001, Recent advances in the functionalisation of polybenzimidazole and polyetherketone for fuel cell applications, J Membr Sci, 185, 41, 10.1016/S0376-7388(00)00633-5 Peighambardoust, 2010, Review of the proton exchange membranes for fuel cell applications, Int J Hydrogen Energy, 35, 9349, 10.1016/j.ijhydene.2010.05.017 Zhang, 2012, Advances in the high performance polymer electrolyte membranes for fuel cells, Chem Soc Rev, 41, 2382, 10.1039/c2cs15269j Hibino, 2000, Low-operating-temperature solid oxide fuel cell in hydrocarbon-air mixtures, Science, 288, 2031, 10.1126/science.288.5473.2031 Hickner, 2005, The chemical and structural nature of proton exchange membrane fuel cell properties, Fuel Cells, 5, 213, 10.1002/fuce.200400064 Jörissen, 2002, New membranes for direct methanol fuel cells, J Power Sources, 105, 267, 10.1016/S0378-7753(01)00952-1 Kim, 2010, Performance of air-breathing direct methanol fuel cell with anion-exchange membrane, Int J Hydrogen Energy, 35, 768, 10.1016/j.ijhydene.2009.10.100 Li, 2005, Quaternized polyethersulfone cardo anion exchange membranes for direct methanol alkaline fuel cells, J Membr Sci, 262, 1, 10.1016/j.memsci.2005.07.009 An, 2010, Performance of a direct ethylene glycol fuel cell with an anion-exchange membrane, Int J Hydrogen Energy, 35, 4329, 10.1016/j.ijhydene.2010.02.009 Matsuoka, 2005, Alkaline direct alcohol fuel cells using an anion exchange membrane, J Power Sources, 150, 27, 10.1016/j.jpowsour.2005.02.020 Zhang, 2010, PTFE based composite anion exchange membranes: thermally induced in situ polymerization and direct hydrazine hydrate fuel cell application, J Mater Chem, 20, 8139, 10.1039/c0jm01311k Asazawa, 2009, Study of anode catalysts and fuel concentration on direct hydrazine alkaline anion-exchange membrane fuel cells, J Electrochem Soc, 156, B509, 10.1149/1.3082129 Yoshimura, 2014, Imidazolium cation based anion-conducting electrolyte membranes prepared by radiation induced grafting for direct hydrazine hydrate fuel cells, J Electrochem Soc, 161, F889, 10.1149/2.0511409jes Qu, 2012, A high-performance anion exchange membrane based on bi-guanidinium bridged polysilsesquioxane for alkaline fuel cell application, J Mater Chem, 22, 8203, 10.1039/c2jm16211c Jamard, 2008, Study of fuel efficiency in a direct borohydride fuel cell, J Power Sources, 176, 287, 10.1016/j.jpowsour.2007.10.036 Duteanu, 2007, A parametric study of a platinum ruthenium anode in a direct borohydride fuel cell, J Appl Electrochem, 37, 1085, 10.1007/s10800-007-9360-y An, 2011, Alkaline direct oxidation fuel cell with non-platinum catalysts capable of converting glucose to electricity at high power output, J Power Sources, 196, 186, 10.1016/j.jpowsour.2010.05.069 Asazawa, 2007, A platinum-free zero-carbon-emission easy fuelling direct hydrazine fuel cell for vehicles, Angew Chemie-In Ed, 46, 8024, 10.1002/anie.200701334 Zhang, 2011, Poly(vinylidene fluoride) based anion conductive ionomer as a catalyst binder for application in anion exchange membrane fuel cell, J Power Sources, 196, 3099, 10.1016/j.jpowsour.2010.11.102 Suntivich, 2011, Design principles for oxygen-reduction activity on perovskite oxide catalysts for fuel cells and metal–air batteries, Nat Chem, 3, 546, 10.1038/nchem.1069 Miyazaki, 2014, Electrocatalysts and triple-phase boundary for anion-exchange membrane fuel cells, Electrochemistry, 82, 730, 10.5796/electrochemistry.82.730 Varcoe, 2005, Prospects for alkaline anion-exchange membranes in low temperature fuel cells, Fuel Cells, 5, 187, 10.1002/fuce.200400045 Merle, 2011, Anion exchange membranes for alkaline fuel cells: a review, J Membr Sci, 377, 1, 10.1016/j.memsci.2011.04.043 Casalegno, 2008, DMFC anode polarization: experimental analysis and model validation, J Power Sources, 175, 372, 10.1016/j.jpowsour.2007.09.003 Varcoe, 2006, An electron-beam-grafted ETFE alkaline anion-exchange membrane in metal-cation-free solid-state alkaline fuel cells, Electrochem Commun, 8, 839, 10.1016/j.elecom.2006.03.027 Yokota, 2014, Anion conductive aromatic block copolymers containing diphenyl ether or sulfide groups for application to alkaline fuel cells, ACS Appl Mater Interfaces, 6, 17044, 10.1021/am5046586 Pan, 2010, High-performance alkaline polymer electrolyte for fuel cell applications, Adv Funct Mater, 20, 312, 10.1002/adfm.200901314 Yan, 2011, Quaternized poly(ether ether ketone) hydroxide exchange membranes for fuel cells, J Membr Sci, 375, 204, 10.1016/j.memsci.2011.03.046 Zhang, 2011, Imidazolium functionalized polysulfone anion exchange membrane for fuel cell application, J Mater Chem, 21, 12744, 10.1039/c1jm10656b Yan, 2014, Imidazolium-functionalized poly(ether ether ketone) as membrane and electrode ionomer for low-temperature alkaline membrane direct methanol fuel cell, J Power Sources, 250, 90, 10.1016/j.jpowsour.2013.10.140 Gu, 2009, A soluble and highly conductive ionomer for high-performance hydroxide exchange membrane fuel cells, Angew Chemie-In Ed, 48, 6499, 10.1002/anie.200806299 Wang, 2010, Novel hydroxide-conducting polyelectrolyte composed of an poly(arylene ether sulfone) containing pendant quaternary guanidinium groups for alkaline fuel cell applications, Macromolecules, 43, 3890, 10.1021/ma100260a Lin, 2013, Novel alkaline anion exchange membranes containing pendant benzimidazolium groups for alkaline fuel cells, J Membr Sci, 443, 193, 10.1016/j.memsci.2013.04.059 Varcoe, 2014, Anion-exchange membranes in electrochemical energy systems, Energy & Environ Sci, 7, 3135, 10.1039/C4EE01303D Schmidt-Rohr, 2008, Parallel cylindrical water nanochannels in Nafion fuel-cell membranes, Nat Mater, 7, 75, 10.1038/nmat2074 Zhang, 2012, Influence of solvent on polymer prequaternization toward anion-conductive membrane fabrication for all-vanadium flow battery, J Phys Chem B, 116, 9016, 10.1021/jp304880r Robertson, 2010, Tunable high performance cross-linked alkaline anion exchange membranes for fuel cell applications, J Am Chem Soc, 132, 3400, 10.1021/ja908638d Tanaka, 2011, Anion conductive block poly(arylene ether)s: synthesis, properties, and application in alkaline fuel cells, J Am Chem Soc, 133, 10646, 10.1021/ja204166e Li, 2012, Phenyltrimethylammonium functionalized polysulfone anion exchange membranes†, Macromolecules, 45, 2411, 10.1021/ma202681z Iojoiu, 2006, From polymer chemistry to membrane elaboration, J Power Sources, 153, 198, 10.1016/j.jpowsour.2005.05.039 Couture, 2011, Polymeric materials as anion-exchange membranes for alkaline fuel cells, Prog Polym Sci, 36, 1521, 10.1016/j.progpolymsci.2011.04.004 Zhang, 2010, Synthesis and alkaline stability of novel cardo poly(aryl ether sulfone)s with pendent quaternary ammonium aliphatic side chains for anion exchange membranes, Polymer, 51, 5407, 10.1016/j.polymer.2010.09.049 Cope, 1963, Mechanism of the Hofmann elimination reaction: an ylide intermediate in the pyrolysis of a highly branched quaternary hydroxide, J Am Chem Soc, 85, 1949, 10.1021/ja00896a012 Chempath, 2010, Density functional theory study of degradation of tetraalkylammonium hydroxides, J Phys Chem C, 114, 11977, 10.1021/jp9122198 Chempath, 2008, Mechanism of tetraalkylammonium headgroup degradation in alkaline fuel cell membranes, J Phys Chem C, 112, 3179, 10.1021/jp7115577 Nuñez, 2013, Quantitative 1H NMR analysis of chemical stabilities in anion-exchange membranes, ACS Macro Lett, 2, 49, 10.1021/mz300486h Qiao, 2012, Highly stable hydroxyl anion conducting membranes poly(vinyl alcohol)/poly(acrylamide-co-diallyldimethylammonium chloride) (PVA/PAADDA) for alkaline fuel cells: effect of cross-linking, Int J Hydrogen Energy, 37, 4580, 10.1016/j.ijhydene.2011.06.038 Lee, 2014, Anion exchange membranes based on novel quaternized block copolymers for alkaline direct methanol fuel cells, RSC Adv, 4, 10944, 10.1039/c3ra47886f Jangu, 2014, Phosphonium cation-containing polymers: from ionic liquids to polyelectrolytes, Polymer, 55, 3298, 10.1016/j.polymer.2014.04.015 Hemp, 2013, Phosphonium ionenes from well-defined step-growth polymerization: thermal and melt rheological properties, Polym Chem, 4, 3582, 10.1039/c3py00365e Lin, 2013, Alkaline polymer electrolytes containing pendant dimethylimidazolium groups for alkaline membrane fuel cells, J Mater Chem A, 1, 7262, 10.1039/c3ta10308k Yang, 2014, A stable anion exchange membrane based on imidazolium salt for alkaline fuel cell, J Membr Sci, 467, 48, 10.1016/j.memsci.2014.05.017 Awlad Hossain, 2013, Synthesis and characterization of tetra-imidazolium hydroxides poly(fluorenylene ether sulfone) anion exchange membranes, React Funct Polym, 73, 1299, 10.1016/j.reactfunctpolym.2013.06.010 Rao, 2013, Cardo poly(arylene ether sulfone) block copolymers with pendant imidazolium side chains as novel anion exchange membranes for direct methanol alkaline fuel cell, Polymer, 54, 6918, 10.1016/j.polymer.2013.10.052 Zarrin, 2015, Quaternized graphene oxide nanocomposites as fast hydroxide conductors, ACS Nano, 9, 2028, 10.1021/nn507113c Disabb-Miller, 2013, Water uptake and ion mobility in cross-linked bis(terpyridine)ruthenium-based anion exchange membranes, Macromolecules, 46, 9279, 10.1021/ma401701n Tadanaga, 2010, Direct ethanol fuel cell using hydrotalcite clay as a hydroxide ion conductive electrolyte, Adv Mater, 22, 4401, 10.1002/adma.201001766 Hibino, 2013, Hydroxide ion conduction in molybdenum(vi)-doped tin pyrophosphate at intermediate temperatures, J Mater Chem A, 1, 6934, 10.1039/c3ta10769h Zhang, 2014, Novel cross-linked anion exchange membranes with diamines as ionic exchange functional groups and crosslinking groups, Int J Hydrogen Energy, 39, 13718, 10.1016/j.ijhydene.2014.03.122 Yokota, 2014, Aromatic copolymers containing ammonium-functionalized oligophenylene moieties as highly anion conductive membranes, Macromolecules, 47, 8238, 10.1021/ma5019878 Li, 2014, Synthesis and properties of multiblock ionomers containing densely functionalized hydrophilic blocks for anion exchange membranes, J Membr Sci, 467, 1, 10.1016/j.memsci.2014.05.016 Shen, 2013, Synthesis and properties of a novel poly(aryl ether ketone)s with quaternary ammonium pendant groups for anion exchange membranes, J Membr Sci, 440, 20, 10.1016/j.memsci.2013.02.046 Li, 2013, Highly stable, anion conductive, comb-shaped copolymers for alkaline fuel cells, J Am Chem Soc, 135, 10124, 10.1021/ja403671u Sun, 2012, Novel nanostructured high-performance anion exchange ionomers for anion exchange membrane fuel cells, J Power Sources, 202, 70, 10.1016/j.jpowsour.2011.11.023 Cao, 2012, The synthesis and characteristic of an anion conductive polymer membrane for alkaline anion exchange fuel cells, J Power Sources, 201, 226, 10.1016/j.jpowsour.2011.10.113 Lee, 2011, Alkaline fuel cell membranes from xylylene block ionenes, J Membr Sci, 383, 254, 10.1016/j.memsci.2011.08.062 Tripathi, 2010, Organic-inorganic hybrid alkaline membranes by epoxide ring opening for direct methanol fuel cell applications, J Membr Sci, 360, 90, 10.1016/j.memsci.2010.05.005 Kostalik, 2010, Solvent processable tetraalkylammonium-functionalized polyethylene for use as an alkaline anion exchange membrane, Macromolecules, 43, 7147, 10.1021/ma101172a Zhou, 2009, Anionic polysulfone ionomers and membranes containing fluorenyl groups for anionic fuel cells, J Power Sources, 190, 285, 10.1016/j.jpowsour.2008.12.127 Hibbs, 2009, Synthesis and characterization of poly(phenylene)-based anion exchange membranes for alkaline fuel cells, Macromolecules, 42, 8316, 10.1021/ma901538c Noonan, 2012, Phosphonium-functionalized polyethylene: a new class of base-stable alkaline anion exchange membranes, J Am Chem Soc, 134, 18161, 10.1021/ja307466s Cotanda, 2014, High anion conductivity and low water uptake of phosphonium containing diblock copolymer membranes, Macromolecules, 47, 7540, 10.1021/ma501744w Ye, 2013, Development of phosphonium-based bicarbonate anion exchange polymer membranes, J Membr Sci, 443, 93, 10.1016/j.memsci.2013.04.053 Morandi, 2015, Novel imidazolium-functionalized anion-exchange polymer PBI blend membranes, J Membr Sci, 476, 256, 10.1016/j.memsci.2014.11.049 Liu, 2014, Anion transport in a chemically stable, sterically bulky α-C modified imidazolium functionalized anion exchange membrane, J Phys Chem C, 118, 15136, 10.1021/jp5027674 Hossain, 2014, Anion conductive aromatic membrane of poly(tetra phenyl ether sulfone) containing hexa-imidazolium hydroxides for alkaline fuel cell application, Solid State Ionics, 262, 754, 10.1016/j.ssi.2013.09.036 Lin, 2013, Alkaline stable C2-substituted imidazolium-based anion-exchange membranes, Chem Mater, 25, 1858, 10.1021/cm400468u Gu, 2013, Highly stable N3-substituted imidazolium-based alkaline anion exchange membranes: experimental studies and theoretical calculations, Macromolecules, 47, 208, 10.1021/ma402334t Ran, 2012, Development of imidazolium-type alkaline anion exchange membranes for fuel cell application, J Membr Sci, 415–416, 242, 10.1016/j.memsci.2012.05.006 Lin, 2011, A soluble and conductive polyfluorene ionomer with pendant imidazolium groups for alkaline fuel cell applications, Macromolecules, 44, 9642, 10.1021/ma202159d Guo, 2010, Synthesis and characterization of novel anion exchange membranes based on imidazolium-type ionic liquid for alkaline fuel cells, J Membr Sci, 362, 97, 10.1016/j.memsci.2010.06.026 Zhang, 2010, A novel guanidinium grafted poly(aryl ether sulfone) for high-performance hydroxide exchange membranes, Chem Commun, 46, 7495, 10.1039/c0cc01834a Sajjad, 2014, Synthesis of guanidinium-based anion exchange membranes and their stability assessment, Polym Adv Tech, 25, 108, 10.1002/pat.3211 Liu, 2014, A facile strategy for the synthesis of guanidinium-functionalized polymer as alkaline anion exchange membrane with improved alkaline stability, J Membr Sci, 453, 52, 10.1016/j.memsci.2013.10.054 Lin, 2012, Alkali resistant and conductive guanidinium-based anion-exchange membranes for alkaline polymer electrolyte fuel cells, J Power Sources, 217, 373, 10.1016/j.jpowsour.2012.05.062 Arges, 2012, Assessing the influence of different cation chemistries on ionic conductivity and alkaline stability of anion exchange membranes, J Mater Chem, 22, 3733, 10.1039/c2jm14898f Hibbs, 2013, Alkaline stability of poly(phenylene)-based anion exchange membranes with various cations, J Polym Sci Part B: Polym Phys, 51, 1736, 10.1002/polb.23149 Li, 2013, Synthesis and characterization of anion exchange membranes based on poly(arylene ether sulfone)s containing various cations functioned tetraphenyl methane moieties, Int J Hydrogen Energy, 38, 11067, 10.1016/j.ijhydene.2013.01.006 Li, 2014, Degradation of guanidinium-functionalized anion exchange membrane during alkaline environment, Int J Hydrogen Energy, 39, 13710, 10.1016/j.ijhydene.2014.03.133 Qiu, 2012, Alkaline imidazolium- and quaternary ammonium-functionalized anion exchange membranes for alkaline fuel cell applications, J Mater Chem, 22, 1040, 10.1039/C1JM14331J Henderson, 1960, The basicity of phosphines, J Am Chem Soc, 82, 5791, 10.1021/ja01507a008 Deavin, 2012, Anion-exchange membranes for alkaline polymer electrolyte fuel cells: comparison of pendent benzyltrimethylammonium- and benzylmethylimidazolium-head-groups, Energy & Environ Sci, 5, 8584, 10.1039/c2ee22466f Couture, 2015, Comparison of epoxy- and cyclocarbonate-functionalised vinyl ethers in radical copolymerisation with chlorotrifluoroethylene, J Fluor Chem, 171, 124, 10.1016/j.jfluchem.2014.08.014 Couture, 2015, Methods to prepare quaternary ammonium groups-containing alternating poly(chlorotrifluoroethylene-alt-vinyl ether) copolymers, RSC Adv, 5, 10243, 10.1039/C4RA09238D Tomoi, 1997, Synthesis and thermal stability of novel anion exchange resins with spacer chains, J Appl Polym Sci, 64, 1161, 10.1002/(SICI)1097-4628(19970509)64:6<1161::AID-APP16>3.0.CO;2-Z Marino, 2015, Alkaline stability of quaternary ammonium cations for alkaline fuel cell membranes and ionic liquids, Chemsuschem, 8, 513, 10.1002/cssc.201403022 Li, 2012, Comb-shaped polymers to enhance hydroxide transport in anion exchange membranes, Energy & Environ Sci, 5, 7888, 10.1039/c2ee22050d Ran, 2014, Simultaneous enhancements of conductivity and stability for anion exchange membranes (AEMs) through precise structure design, Sci Rep, 4, 6486, 10.1038/srep06486 Fang, 2012, Cross-linked, ETFE-derived and radiation grafted membranes for anion exchange membrane fuel cell applications, J Hydrogen Energy, 37, 594, 10.1016/j.ijhydene.2011.09.112 Bauer, 1990, Anion-exchange membranes with improved alkaline stability, Desalination, 79, 125, 10.1016/0011-9164(90)85002-R Di Vona, 2014, Anion-conducting ionomers: study of type of functionalizing amine and macromolecular cross-linking, Int J Hydrogen Energy, 39, 14039, 10.1016/j.ijhydene.2014.06.166 Lin, 2010, Cross-linked alkaline ionic liquid-based polymer electrolytes for alkaline fuel cell applications, Chem Mater, 22, 6718, 10.1021/cm102957g Price, 2014, Relationships between structure and alkaline stability of imidazolium cations for fuel cell membrane applications, ACS Macro Lett, 3, 160, 10.1021/mz4005452 Si, 2014, Effects of substituents and substitution positions on alkaline stability of imidazolium cations and their corresponding anion-exchange membranes, ACS Appl Mater Interfaces, 6, 4346, 10.1021/am500022c Toshio, 2000, Modified guanidines as potential chiral superbases. 1. Preparation of 1,3-disubstituted 2-Iminoimidazolidines and the related guanidines through chloroamidine derivatives, J Org Chem, 65 Kim, 2011, Guanidinium-functionalized anion exchange polymer electrolytes via activated fluorophenyl-amine reaction, Chem Mater, 23, 3795, 10.1021/cm2016164 Zhao, 2014, High durability and hydroxide ion conducting pore-filled anion exchange membranes for alkaline fuel cell applications, J Power Sources, 269, 1, 10.1016/j.jpowsour.2014.06.026 Gu, 2011, Self-crosslinking for dimensionally stable and solvent-resistant quaternary phosphonium based hydroxide exchange membranes, Chem Commun, 47, 2856, 10.1039/c0cc04335d M-sJ, 2011, A perfluorinated anion exchange membrane with a 1,4-dimethylpiperazinium cation, J Mater Chem, 21, 6158, 10.1039/c1jm10320b Li, 2013, Towards high conductivity in anion-exchange membranes for alkaline fuel cells, Chemsuschem, 6, 1376, 10.1002/cssc.201300320 Arges, 2013, Two-dimensional NMR spectroscopy reveals cation-triggered backbone degradation in polysulfone-based anion exchange membranes, Proc Nat Acad Sci, 110, 2490, 10.1073/pnas.1217215110 Pan, 2011, Designing advanced alkaline polymer electrolytes for fuel cell applications, Acc Chem Res, 45, 473, 10.1021/ar200201x Vinodh, 2011, Novel quaternized polysulfone/ZrO2 composite membranes for solid alkaline fuel cell applications, Int J Hydrogen Energy, 36, 7291, 10.1016/j.ijhydene.2011.03.056 Yan, 2014, Quaternary phosphonium-functionalized poly(ether ether ketone) as highly conductive and alkali-stable hydroxide exchange membrane for fuel cells, J Membr Sci, 466, 220, 10.1016/j.memsci.2014.04.056 Wang, 2014, Crosslinked poly (ether ether ketone) hydroxide exchange membranes with improved conductivity, J Membr Sci, 459, 86, 10.1016/j.memsci.2014.01.068 Zhang, 2011, New polyethylene based anion exchange membranes (PE–AEMs) with high ionic conductivity, Macromolecules, 44, 5937, 10.1021/ma200836d Corey, 1995, Novel electronic effects of remote substituents on the oxazaborolidine-catalyzed enantioselective reduction of ketones, Tetrahedron Lett, 36, 9153, 10.1016/0040-4039(95)01961-G Wang, 2005, Sorption and transport properties of gases in aromatic polyimide membranes, J Membr Sci, 248, 15, 10.1016/j.memsci.2004.09.015 Li, 2014, Assessing the influence of side-chain and main-chain aromatic benzyltrimethyl ammonium on anion exchange membranes, ACS Appl Mater Interfaces, 6, 7585, 10.1021/am500915w Thomas, 2012, A stable hydroxide-conducting polymer, J Am Chem Soc, 134, 10753, 10.1021/ja303067t Wright, 2014, Hydroxide-stable ionenes, ACS Macro Lett, 3, 444, 10.1021/mz500168d Henkensmeier, 2014, Anion conducting polymers based on ether linked polybenzimidazole (PBI-OO), Int J Hydrogen Energy, 39, 2842, 10.1016/j.ijhydene.2013.07.091 Ni, 2011, Novel self-crosslinked poly(aryl ether sulfone) for high alkaline stable and fuel resistant alkaline anion exchange membranes, Chem Commun, 47, 8943, 10.1039/c1cc12430g Park, 2014, Electrospun and cross-linked nanofiber composite anion exchange membranes, Macromolecules, 47, 227, 10.1021/ma401932h Pan, 2010, Self-crosslinked alkaline polymer electrolyte exceptionally stable at 90 degrees C, Chem Commun, 46, 8597, 10.1039/c0cc03618h Jasti, 2014, Highly stable self-crosslinked anion conductive ionomers for fuel cell applications, RSC Adv, 4, 19238, 10.1039/c4ra02507e Wu, 2014, A reversible water electrolyser with porous PTFE based OH− conductive membrane as energy storage cells, J Power Sources, 246, 225, 10.1016/j.jpowsour.2013.07.081 Cao, 2012, Preparation of polytetrafluoroethylene porous membrane based composite alkaline exchange membrane with improved tensile strength and its fuel cell test, Int J Hydrogen Energy, 37, 12688, 10.1016/j.ijhydene.2012.05.134 Wang, 2011, A polytetrafluoroethylene-quaternary 1,4-diazabicyclo-[2.2.2]-octane polysulfone composite membrane for alkaline anion exchange membrane fuel cells, Int J Hydrogen Energy, 36, 10022, 10.1016/j.ijhydene.2011.05.054 Hibino, 2013, Intermediate-temperature alkaline fuel cells with non-platinum electrodes, J Mater Chem A, 1, 7019, 10.1039/c3ta11118k Zeng, 2012, Synthesis and characterization of crosslinked poly (vinyl alcohol)/layered double hydroxide composite polymer membranes for alkaline direct ethanol fuel cells, Int J Hydrogen Energy, 37, 18425, 10.1016/j.ijhydene.2012.09.089 Long, 2012, Hydroxide degradation pathways for substituted trimethylammonium cations: a DFT study, J Phys Chem C, 116, 9419, 10.1021/jp3014964 Long, 2014, Hydroxide degradation pathways for imidazolium cations: a DFT study, J Phys Chem C, 118, 9880, 10.1021/jp501362y