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    Understanding the mechanism of a conjugated ladder polymer as a stable anode for acidic polymer-air batteries

    Year: 2023

    Authors: Ma, Ting; Yang, Yifei; Johnson, Denis; Hansen, Kyle; Xiang, Sisi; Thakur, Ratul Mitra; Djire, Abdoulaye; Lutkenhaus, Jodie L.

    Keywords: kinetics; acidic polymer-air battery; charge and mass transfer; conductance; conjugated ladder polymer; redox mechanism

    Polymer-air batteries promise safer and cheaper sustainable energy storage than conventional batteries. However, the polymer anode’s limited stability, kinetics, and conductivity have prevented real-world use. This research demonstrates a potential solution by using the conjugated ladder polymer poly(benzimidazobenzophenanthroline) (BBL) as a remarkably stable anode material in acidic polymer-air batteries. Analysis revealed BBL’s rapid kinetics, high electrical conductivity, and rigid structure enable excellent performance and stability under battery operating conditions. This highlights that ladder polymers such as BBL are a pivotal advancement for enabling practical polymer-air batteries for electric vehicles and grid storage. Further optimization of BBL and similar conjugated ladder polymers could make polymer-air batteries promisingly competitive for widespread commercial adoption as a low-cost, sustainable alternative to lithium-ion with enhanced safety.
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