DataVXAdvanced Functional MaterialsPaper
journal article·2023-02Open access

Immobilizing Poly(vinylphenothiazine) in Ketjenblack‐Based Electrodes to Access its Full Specific Capacity as Battery Electrode Material

Bärbel Tengen, Timo Winkelmann, Niklas Ortlieb, Verena Perner, Gauthier Studer, Martin Winter, Birgit Esser, Anna Fischer, Peter Bieker

Advanced Functional Materials· Volume 33· Issue 9
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Source abstract

Abstract

Abstract Organic batteries are considered as environmentally friendly alternative to lithium‐ion batteries due to the application of transition metal‐free redox‐active polymers. One well‐established polymer is poly(3‐vinyl‐N‐methylphenothiazine) (PVMPT) with a fast reversibility of the electrochemical redox reaction at a potential of 3.5 V versus Li|Li+. The oxidized PVMPT is soluble in many standard battery electrolytes, which diminishes its available specific capacity but at the same time can lead to a unique charge/discharge mechanism involving a redeposition process upon discharge. Herein, the influence of different conductive carbon additives and their properties, e.g., specific surface area, pore size distribution, and electrical conductivity, on the dissolution behavior of oxidized PVMPT is investigated. Compared to the state‐of‐the‐art conductive carbon Super C65 employed in many organic battery electrodes, Ketjenblack EC‐300J and EC‐600J reduce the dissolution of the oxidized PVMPT due to better immobilization on the carbon additive and in the resulting 3D structure of the electrode, as assessed by N2‐physisorption, electrochemical, UV–vis spectroscopy and scanning electron microscopy investigations. The studies demonstrate that a dense packing of the carbon particles in the electrode is decisive for the stable immobilization of PVMPT while maintaining its long‐term cycling performance.
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Research context

Energy storagePolymers

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

MEET Battery Research Center Institute of Physical Chemistry University of Münster Corrensstr. 46 48149 Münster Germany

Faculty of Physical Chemistry, Corrensstr. 28–30 and Center for Soft Nanoscience (SoN) University of Münster Busso‐Peus‐Str. 10 48149 Münster Germany

REDcert GmbH Schwertberger Str. 16 53177 Bonn Germany

Institute of Inorganic and Analytic Chemistry University of Freiburg Albertstr. 21 79104 Freiburg Germany

Freiburg Center of Interactive Materials and Bioinspired Technologies (FIT) University of Freiburg Georges‐Köhler‐Allee 105 79110 Freiburg Germany

Freiburg Materials Research Center (FMF) University of Freiburg Stefan‐Meier‐Str. 21 79104 Freiburg Germany

Cluster of Excellence livMatS University of Freiburg Georges‐Köhler‐Allee 105 79110 Freiburg Germany

Institute for Organic Chemistry University of Freiburg Albertstr. 21 79104 Freiburg Germany

Institute of Organic Chemistry II and Advanced Materials Ulm University Albert‐Einstein‐Allee 11 89081 Ulm Germany

Helmholtz‐Institute Münster IEK‐12 Forschungszentrum Jülich GmbH Corrensstr. 46 48149 Münster Germany

Funding

Deutsche Forschungsgemeinschaft · Deutsche Bundesstiftung Umwelt

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