| 35 | 0 | 8 |
| Downloads | Citas | Reads |
The performance of anion exchange membrane fuel cells(AEMFCs) is severely constrained by the low OH~- conductivity of anion-conductive polymers.Although increasing the ion exchange capacity of these polymers through microstructural design effectively improves the OH~-conductivity,it often compromises the mechanical strength.To address this issue,we report enhanced microphaseseparated structures in poly(styrene-b-(ethylene-cobutylene)-b-styrene)(SEBS)-based anion-conductive polymers,achieved through the synergy of hydrophilic quaternary ammonium(QA) groups and hydrophobic fluorinated side chains.Specifically,by precisely tuning the fluorine grafting degree of the polymer side chains,highly interconnected nanoscale ion-conducting domains are created,forming a three-dimensional(3D) pathway for efficient ion transport in anion exchange membranes(AEMs).Additionally,the mechanical stability of AEMs is strengthened by minimizing swelling.As a result,the QA-and fluorine-grafted AEM with a molar proportion of 4-fluorophenethylamine-modified blocks to styrene blocks of 30%(denoted as QSEBS-FPh30) achieves a high OH~-conductivity of 100.86 mS/cm at 80 ℃ and a moderate tensile strength of 19.89 MPa in a fully hydrated state.The AEMFC utilizing QSEBS-FPh30 exhibits a peak power density of 204.31 mW/cm2 at a current density of 737.29mA/cm2 and 80 ℃,which is 1.4 times that of QA-grafted SEBS(QSEBS).These findings underscore the significant role of microphase separation coupled with maximized ionic domain connectivity in enhancing the OH~-conductivity of anion-conductive polymers,offering valuable insights for the rational design of high-performance AEMs.
[1]JANNASCH P,WEIBER E A.Configuring anion-exchange membranes for high conductivity and alkaline stability by using cationic polymers with tailored side chains[J].Macromolecular Chemistry and Physics,2016,217(10):1108-1118.
[2]VARCOE J R,ATANASSOV P,DEKEL D R,et al.Anion-exchange membranes in electrochemical energy systems[J].Energy&Environmental Science,2014,7(10):3135-3191.
[3]KIM S,HER M,KIM Y,et al.The impact of the catalyst layer structure on the performance of anion exchange membrane fuel cell[J].Electrochimica Acta,2021,400:139439.
[4]MUSTAIN W E,MUSTAIN W,CHATENET M,et al.Durability challenges of anion exchange membrane fuel cells[J].Energy&Environmental Science,2020,13(9):2805-2838.
[5]CHEN N J,LEE Y M.Anion exchange polyelectrolytes for membranes and ionomers[J].Progress in Polymer Science,2021,113:101345.
[6]ZHANG J J,ZHANG K Y,LIANG X,et al.Self-aggregating cationic-chains enable alkaline stable ion-conducting channels for anion-exchange membrane fuel cells[J].Journal of Materials Chemistry A,2021,9(1):327-337.
[7]LIN B C,XU F,SU Y,et al.Ether-free polybenzimidazole bearing pendant imidazolium groups for alkaline anion exchange membrane fuel cells application[J].ACS Applied Energy Materials,2020,3(1):1089-1098.
[8]HAN J J,ZHU L,PAN J,et al.Elastic longchain multication cross-linked anion exchangemembranes[J].Macromolecules,2017,50(8):3323-3332.
[9]GU S,CAI R,YAN Y S.Self-crosslinking for dimensionally stable and solvent-resistant quaternary phosphonium based hydroxide exchange membranes[J].Chemical Communications,2011,47(10):2856-2858.
[10]PAN J,LU S F,LI Y,et al.High-performance alkaline polymer electrolyte for fuel cell applications[J].Advanced Functional Materials,2010,20(2):312-319.
[11]SAIDIN N U,JEHAN O S,LEONG K S,et al.Influence of ionomer concentration and membrane thickness on membrane electrode assembly in alkaline fuel cell performance[J].Asia-Pacific Journal of Chemical Engineering,2024,19(2):e3024.
[12]EON C J,CHOI J,LEE S,et al.Effects of fabrication parameters of membrane-electrode assembly for high-performance anion exchange membrane fuel cells[J].Journal of Industrial and Engineering Chemistry,2024,133:255-262.
[13]XIE N,WANG T,KANG H W,et al.Decisive effect of hydrophobic rigid-flexible coupled side chains of polycarbazoles on the performance of anion exchange membranes for fuel cells[J].ACS Applied Energy Materials,2024,7(20):9512-9524.
[14]LAI A N,WANG Z,LIN R K,et al.Tandem one-pot synthesis of block copolymers for anion exchange membranes[J].Journal of Applied Polymer Science,2024,141(39):e55997.
[15]SHEN S Y,HAN A D,YAN X H,et al.Influence of equivalent weight of ionomer on proton conduction behavior in fuel cell catalyst layers[J].Journal of the Electrochemical Society,2019,166(12):F724-F728.
[16]OHASHI H,JUNG H,CHI X Q,et al.Alkaliresistant anion exchange membranes with grafted poly electrolyte for fuel cells[J].Chemistry Letters,2018,47(7):857-859.
[17]HOSSAIN M M,HOU J Q,WU L,et al.Anion exchange membranes with clusters of alkyl ammonium group for mitigating water swelling but not ionic conductivity[J].Journal of Membrane Science,2018,550:101-109.
[18]YAN J L,HICKNER M A.Anion exchange membranes by bromination of benzylmethylcontaining poly(sulfone)s[J].Macromolecules,2010,43(5):2349-2356.
[19]AHN Y,KIM D.Anion exchange membrane prepared from imidazolium grafted poly(arylene ether ketone)with enhanced durability for vanadium redox flow battery[J].Journal of Industrial and Engineering Chemistry,2019,71:361-368.
[20]YIN Z Y,WU Y Z,SHI B B,et al.Alkaline stable piperidinium-based biphenyl polymer for anion exchange membranes[J].Solid State Ionics,2022,383:115969.
[21]LEE W H,KIM Y S,BAE C.Robust hydroxide ion conducting poly(biphenyl alkylene)s for alkaline fuel cell membranes[J].ACS Macro Letters,2015,4(8):814-818.
[22]WANG F,CUI Y,SANG J,et al.Cross-linked of poly(biphenyl pyridine)and poly(styrene-b-(ethylene-co-butylene)-b-styrene)grafted with double cations for anion exchange membrane[J].Electrochimica Acta,2022,405:139770.
[23]JEON J Y,PARK S,HAN J,et al.Synthesis of aromatic anion exchange membranes by FriedelCrafts bromoalkylation and cross-linking of polystyrene block copolymers[J].Macromolecules,2019,52(5):2139-2147.
[24]AL MUNSUR A Z,HOSSAIN I,NAM S Y,et al.Quaternary ammonium-functionalized hexyl bis(quaternary ammonium)-mediated partially crosslinked SEBSs as highly conductive and stable anion exchange membranes[J].International Journal of Hydrogen Energy,2020,45(31):15658-15671.
[25]GAO X Q,YU H M,QIN B W,et al.Enhanced water transport in AEMs based on poly(styrene-ethylene-butylene-styrene)triblock copolymer for high fuel cell performance[J].Polymer Chemistry,2019,10(15):1894-1903.
[26]HE Y B,SI J J,WU L,et al.Dual-cation comb-shaped anion exchange membranes:structure,morphology and properties[J].Journal of Membrane Science,2016,515:189-195.
[27]LONG C,ZHAO T,TIAN L,et al.Highly stable and conductive multicationic poly(biphenyl indole)with extender side chains for anion exchange membrane fuel cells[J].ACS Applied Energy Materials,2021,4(6):6154-6165.
[28]DANG H S,JANNASCH P.Exploring different cationic alkyl side chain designs for enhanced alkaline stability and hydroxide ion conductivity of anion-exchange membranes[J].Macromolecules,2015,48(16):5742-5751.
[29]AL MUNSUR A Z,LEE J,CHAE J E,et al.Hexyl quaternary ammonium-and fluorobenzoylgrafted SEBS as hydrophilic-hydrophobic combtype anion exchange membranes[J].Journal of Membrane Science,2022,643:120029.
[30]HAN J J,LIU C F,DENG C W,et al.Mechanically robust and highly conductive semiinterpenetrating network anion exchange membranes for fuel cell applications[J].Journal of Power Sources,2022,548:232097.
[31]SANG J,WANG Z,ZHU H.Functionalized POSS-modified SEBS-based composite anion-exchange membranes for AEMFCs[J].Energy&Fuels,2022,36(20):12780-12790.
[32]CHOI J,MIN K,MO Y H,et al.Understanding the effect of triazole on crosslinked PPO-SEBSbased anion exchange membranes for water electrolysis[J].Polymers,2023,15(7):1736.
[33]HU C,DENG X L,DONG X C,et al.Rigid crosslinkers towards constructing highly-efficient ion transport channels in anion exchange membranes[J].Journal of Membrane Science,2021,619:118806.
[34]DAS G,CHOI J H,NGUYEN P K T,et al.Anion exchange membranes for fuel cell application;a review[J].Polymers,2022,14(6):1197.
[35]HUA D X,HUANG J Z,FABBRI E,et al.Development of anion exchange membrane water electrolysis and the associated challenges:a review[J].ChemElectroChem,2023,10(1):e202200999.
[36]SHI Y,ZHAO Z F,LIU W,et al.Physically self-cross-linked SEBS anion exchange membranes[J].Energy&Fuels,2020,34(12):16746-16755.
[37]LEE J,MIN K,JEON S,et al.Development of crosslinked SEBS-based anion exchange membranes for water electrolysis:investigation of the crosslinker effect[J].International Journal of Hydrogen Energy,2023,48(63):24180-24195.
[38]XU Z Q,WILKE V,CHMIELARZ J J,et al.Novel piperidinium-functionalized crosslinked anion exchange membrane with flexible spacers for water electrolysis[J].Journal of Membrane Science,2023,670:121302.
[39]WANG F H,LI C H,SANG J,et al.Synthesis and characterization of a long side-chain doublecation crosslinked anion-exchange membrane based on poly(styrene-b-(ethylene-co-butylene)-b-styrene)[J].International Journal of Hydrogen Energy,2021,46(73):36301-36313.
[40]YU N,DONG J H,LI H H,et al.Improving the performance of quaternized SEBS based anion exchange membranes by adjusting the functional group and side chain structure[J].European Polymer Journal,2021,154:110528.
[41]SANG J,YANG L C,WANG F H,et al.SEBS-based anion exchange membrane grafted with N-spirocyclic quaternary ammonium cations for fuel cells[J].ACS Applied Energy Materials,2022,5(10):12347-12358.
[42]LI Z M,LI C H,LONG C,et al.Elastic and durable multi-cation-crosslinked anion exchange membrane based on poly(styrene-b-(ethylene-cobutylene)-b-styrene)[J].Journal of Polymer Science,2020,58(16):2181-2196.
[43]LONG C,LU C R,LI Y X,et al.N-spirocyclic ammonium-functionalized graphene oxide-basedanion exchange membrane for fuel cells[J].International Journal of Hydrogen Energy,2020,45(38):19778-19790.
[44]ZHOU J,GUO J S,CHU D,et al.Impacts ofanion-exchange-membranes with various ionic exchange capacities on the performance of H_2/O_2fuel cells[J].Journal of Power Sources,2012,219:272-279.
Basic Information:
DOI：10.19884/j.1672-5220.202502010
China Classification Code:TM911.4
Citation Information:
[1]YU Zhenguo,JIN Junhong,YANG Shenglin ,et al.Interconnected Ion Transport Channels Enabled by Enhanced Microphase-Separated Anion-Conductive Polymers for Anion Exchange Membrane Fuel Cells[J].Journal of Donghua University (English Edition),2026,43(02):21-31.DOI:10.19884/j.1672-5220.202502010.
2025-02-21
2025
2026-05-07
2026
2025-04-08
2
2026-04-28
2026-04-28
2026-04-28