Journal Article10.1002/ADMI.201700397
Mixed Ionic–Electronic Conduction in Binary Polymer Nanoparticle Assemblies
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TL;DR: In this article, a modular method based on polymer nanoparticle self-assembly is proposed to achieve MIECs with tunable conductivity, which uses poly(3-hexylthiophene) nanoparticles as the electronic conductor and lithium ion-doped poly(vinylpyridine) nanophotonics as the ionic conductors.
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Abstract: Polymer-based mixed ionic–electronic conductors (MIECs) are desired for both bulk and interfacial materials in next-generation energy storage and electronic devices. Polymer-based MIECs contain two principal components, one for electronic conduction and the other for ionic conduction. The central problem is the lack of a general approach to control the molecular packing and morphology of the constituent components that will afford the ability to easily tune transport properties. This study demonstrates the efficacy of a modular method based on polymer nanoparticle self-assembly to achieve MIECs with tunable conductivity. This work uses poly(3-hexylthiophene) nanoparticles as the electronic conductor and lithium ion-doped poly(vinylpyridine) nanoparticles as the ionic conductors. AC impedance spectroscopic studies show that nanoparticle–nanoparticle interfaces in unary assemblies do not impede ion transport in the solid state. AC impedance spectroscopy and DC steady-state conductivity measurements show that binary nanoparticle assemblies exhibit concurrent ionic and electronic conduction. The power-law scaling percolation of both the ionic and electronic transport displays nonuniversal values of transport critical exponent, revealing different transport mechanisms. The simplicity of fabrication combined with the versatility in obtainable transport properties illustrates the power of using nanoparticle assemblies as a means to realize MIEC polymer mesoscale morphologies.
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Citations
Organic mixed ionic-electronic conductors.
TL;DR: Current understanding of the processes occurring in organic mixed ionic–electronic conductors and their structure–property relations are described, and recent approaches that extend fundamental understanding and contribute to the advancement of materials are highlighted.
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Structure Control of a π-Conjugated Oligothiophene-Based Liquid Crystal for Enhanced Mixed Ion/Electron Transport Characteristics.
Ban Xuan Dong,Ziwei Liu,Mayank Misra,Joseph Strzalka,Jens Niklas,Oleg G. Poluektov,Fernando A. Escobedo,Christopher K. Ober,Paul F. Nealey,Shrayesh N. Patel +9 more
TL;DR: The findings demonstrate that structure and electronic transport in mixed conduction materials could be modulated by the presence of the ion transporting component and will have important implications for other more complex mixed ionic/electronic conductors.
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Graphene-Enhanced Ion Transport in Dual-Conducting Composite Films of Polyacetylene and an Imidazolium Iodide Ionic Liquid
TL;DR: In this article , dual-conducting polymer films were synthesized by dispersing graphene in an aqueous solution of polyvinyl alcohol and 1-propyl-3-methylimidazolium iodide ([C3mim]I) ionic liquid and thermally converting the poly(vinyl) to polyene in the presence of hydroiodic acid catalyst, and the electrical and mechanical properties of the resulting free-standing films of the nanocomposite, containing different concentrations of graphene, were analyzed using electrochemical impedance spectroscopy (EIS) and dynamic mechanical analysis (DMA).
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