Abstract

With very fast polymerization in mild reaction conditions and unique characteristic of double bonds in its synthesized polymer skeleton for further modification and functionalization, ring opening metathesis polymerization (ROMP) becomes one typical processing method to obtain anion exchange membrane (AEM) for fuel cells. In this paper, AEMs prepared by ROMP are reviewed. Polycyclooctene and polynorbornene AEMs with both good stability and high conductivity are achieved with different ion exchange groups such as quaternary ammonium, phosphorus and metal cations (such as bis(terpyridine)-ruthenium(II) and cobaltocenium). Polymer structure and ion channels are mainly constructed in the polymer skeleton to form the “ion channel” microphase-separated structure to improve its chemical stability and ionic conductivity. On the basis of selected ion exchange groups and optimized polymer skeleton, performances obtained in these ion exchange membranes (IEMs) and their corresponding fuel cell performances are summarized. These polycyclooctene and polynorbornene AEMs have excellent properties and promising performances in fuel cells. We believe that further exploration of this class of AEM may lead to practical applications.

摘要

开环复分解聚合（ROMP）在温和的反应条件下聚合速度非常快，合成的聚合物骨架中的双键具有独特的特性，可进一步改性和功能化，因此开环易位聚合（ROMP）成为获得燃料电池阴离子交换膜（AEM）的一种典型加工方法。在本文中，回顾了由 ROMP 制备的 AEM。具有良好稳定性和高导电性的聚环辛烯和聚降冰片烯 AEM 是通过不同的离子交换基团实现的，如季铵、磷和金属阳离子（如双（三联吡啶）-钌（II）和二茂钴）。聚合物结构和离子通道主要构建在聚合物骨架中，形成“离子通道”微相分离结构，以提高其化学稳定性和离子电导率。在选择离子交换基团和优化聚合物骨架的基础上，总结了在这些离子交换膜（IEM）中获得的性能及其相应的燃料电池性能。这些聚环辛烯和聚降冰片烯 AEM 在燃料电池中具有优异的性能和前景。我们相信对此类 AEM 的进一步探索可能会带来实际应用。