Alkaline Stability of Low Oxophilicity Metallopolymer Anion-Exchange Membranes
Alkaline Stability of Low Oxophilicity Metallopolymer Anion-Exchange Membranes
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低亲氧性金属聚合物阴离子交换膜的碱稳定性
DOI：
10.1002/chem.202103744
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发表时间：
2022-02-01
影响因子：
4.3
通讯作者：
Diesendruck, Charles E.
中科院分区：
文献类型：
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作者：
Aggarwal, Kanika;Bsoul, Saja;Diesendruck, Charles E.
阴离子交换膜燃料电池（AEMFC）由于其高效率而成为有前途的能量转换装置。尽管如此，AEMFC 的运行时间目前仍因其聚合物阴离子交换膜的低化学稳定性而受到限制。近年来，金属聚合物（其中金属中心承担离子传输功能）被提议作为化学稳定的替代品。在这里，我们提出了一项系统研究，使用具有侧链 N-杂环卡宾 (NHC) 配体的聚合物主链与各种低亲氧性金属（例如铜、锌、镍和金）络合。金色金属聚合物使用亲氧性最低的金属，表现出卓越的碱性稳定性，远优于最先进的季铵阳离子，以及良好的原位 AEMFC 结果。这些结果表明，精心设计的金属聚合物可能优于纯有机膜，并为该领域的进一步发展提供了科学基础。
Anion-exchange membrane fuel cells (AEMFCs) are promising energy conversion devices due to their high efficiency. Nonetheless, AEMFC operation time is currently limited by the low chemical stability of their polymeric anionexchange membranes. In recent years, metallopolymers, where the metal centers assume the ion transport function, have been proposed as a chemically stable alternative. Here we present a systematic study using a polymer backbone with side-chain N-heterocyclic carbene (NHC) ligands complexed to various metals with low oxophilicity, such as copper, zinc, nickel, and gold. The golden metallopolymer, using the metal with the lowest oxophilicity, demonstrates exceptional alkaline stability, far superior to state-of-the-art quaternary ammonium cations, as well as good in situ AEMFC results. These results demonstrate that judiciously designed metallopolymers may be superior to purely organic membranes and provides a scientific base for further developments in the field.