Pseudocapacitive redox polymers as battery materials
- Redox polymers with distinct redox units have been long recognized for their pseudocapacitive and reversible charge storage behaviour. Many systems investigated so far have utilized organic electrolytes and/or have coupled a redox polymer half-cell to a non-polymer counter electrode. However, due to safety and sustainability considerations, aqueous electrolyte based charge storage in all-polymer configurations is considered a promising option for possible future applications. We present a strategy based on pseudocapacitive charge storage in Osmium-complex and viologen-modified redox polymers with specifically designed poly(vinylimidazole)- and poly(vinylpyridine)-based backbones. We couple both redox polymers in an aqueous battery configuration, demonstrating Nernst-potential driven energy storage. Electrochemical characterization in a concentric three-electrode Swagelok cell and coin cells reveals stable reversible capacities over more than 1800 cycles, with nearly quantitative coulombic efficiencies (>99.4 %) for the coin cells.
| Author: | Stefan DieckhöferORCiDGND, Danea MedinaORCiDGND, Adrian RuffORCiDGND, Felipe ConzueloORCiDGND, Wolfgang SchuhmannORCiDGND |
|---|---|
| URN: | urn:nbn:de:hbz:294-113687 |
| DOI: | https://doi.org/10.1002/celc.202100450 |
| Parent Title (English): | ChemElectroChem |
| Subtitle (English): | A proof-of-concept all-polymer aqueous battery |
| Publisher: | Wiley-VCH |
| Place of publication: | Weinheim |
| Document Type: | Article |
| Language: | English |
| Date of Publication (online): | 2024/11/08 |
| Date of first Publication: | 2021/05/26 |
| Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
| Tag: | Os-complex polymer; aqueous all-polymer battery; redox polymer battery; viologen polymer |
| Volume: | 8 |
| Issue: | 12 |
| First Page: | 2308 |
| Last Page: | 2314 |
| Note: | Dieser Beitrag ist auf Grund des DEAL-Wiley-Vertrages frei zugänglich. |
| Institutes/Facilities: | Lehrstuhl für Analytische Chemie - Elektroanalytik & Sensorik |
| Dewey Decimal Classification: | Naturwissenschaften und Mathematik / Chemie, Kristallographie, Mineralogie |
| open_access (DINI-Set): | open_access |
| faculties: | Fakultät für Chemie und Biochemie |
| Licence (English): |  Creative Commons - CC BY-NC-ND 4.0 - Attribution-NonCommercial-NoDerivatives 4.0 International |
