用于高性能阴离子交换膜的哌啶鎓密集封端的具有刚性侧链的乙烯-苯乙烯多嵌段共聚物,ACS Applied Energy Materials

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用于高性能阴离子交换膜的哌啶鎓密集封端的具有刚性侧链的乙烯-苯乙烯多嵌段共聚物
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2023-08-23 , DOI: 10.1021/acsaem.3c01494
Hanyang Sun ₁ , Zirun Wang ₂ , Haoran Wang ₁ , Zepeng Zhao ₁ , Fang Guo ₁

Affiliation

乙烯与苯乙烯衍生物或异戊二烯的共聚和氢化硅烷化反应相结合，得到相应的乙烯-苯乙烯多嵌段共聚物（Et- s PS和Et -s PS-Ph）或乙烯-异戊二烯多嵌段共聚物（Et-IP）基阴离子交换膜（AEM）带有不同的哌啶鎓悬挂物。与带有聚异戊二烯结构的哌啶的Et-IP膜相比，带有大体积刚性苯基结构的哌啶的Et- s PS和Et- s PS-Ph膜具有更好的机械性能、导电性、热稳定性和碱稳定性。在Et- s中引入烷氧基交联结构PS-Ph膜进一步提高了机械性能、电导率和碱稳定性。疏水性聚乙烯嵌段、刚性聚苯乙烯嵌段和交联结构的组合，最理想的具有 62 mol% 哌啶鎓和 6 mol% 交联结构单元的Et -s PS-Ph(62)-C (6) 膜显示理想性能的完美组合，包括高导电性、低溶胀比、良好的机械性能、优异的耐碱性和工作稳定性。具有理想的 Et- s PS-Ph(62)-C (6) 膜的单电池显示开路电压和峰值功率密度分别为 1.12 V 和 676.2 mW cm ^–2。

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Ethylene–Styrene Multiblock Copolymers with Rigid Side Chains Densely Terminated by Piperidinium for High-Performance Anion Exchange Membranes

The combination of copolymerization of ethylene with styrene derivatives or isoprene and hydrosilylation reaction afforded the corresponding ethylene–styrene multiblock copolymers (Et-sPS and Et-sPS-Ph) or ethylene–isoprene multiblock copolymers (Et-IP) based anion exchange membranes (AEMs) bearing different pendent piperidinium. Compared with Et-IP membrane bearing piperidinium attached to polyisoprene structures, the Et-sPS and Et-sPS-Ph membranes bearing piperidinium attached to bulky and rigid phenyl structures possessed better mechanical properties, conductivity, thermal and alkali stability. The introduction of an alkoxy cross-linked structure to the Et-sPS-Ph membrane further improved the mechanical properties, conductivity, and alkali stability. The combination of hydrophobic polyethylene block, rigid polystyrene block, and cross-linked structure, the most desirable Et-sPS-Ph(62)-C (6) membrane with 62 mol % piperidinium and 6 mol % cross-linked structure units showed an excellent combination of desirable properties, including high conductivity, low swelling ratio, good mechanical properties, excellent alkali, and working stability. The single cell with desirable Et-sPS-Ph(62)-C (6) membrane showed open-circuit voltages and peak power density were 1.12 V and 676.2 mW cm^–2, respectively.

更新日期：2023-08-23

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