Electronic, Ionic, and Mixed Conduction in Polymeric Systems

Annual Review of Materials Research

Vol. 51:1-20 (Volume publication date July 2021)
First published as a Review in Advance on March 26, 2021
https://doi.org/10.1146/annurev-matsci-080619-110405

Abstract

Polymers that simultaneously transport electrons and ions are paramount to drive the technological advances necessary for next-generation electrochemical devices, including energy storage devices and bioelectronics. However, efforts to describe the motion of ions or electrons separately within polymeric systems become inaccurate when both species are present. Herein, we highlight the basic transport equations necessary to rationalize mixed transport and the multiscale material properties that influence their transport coefficients. Potential figures of merit that enable a suitable performance benchmark in mixed conducting systems independent of end application are discussed. Practical design and implementation of mixed conducting polymers require an understanding of the evolving nature of structure and transport with ionic and electronic carrier density to capture the dynamic disorder inherent in polymeric materials.

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