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| Hauptseite > Publikationsdatenbank > Combinations of polymer-based cathode and electrolyte materials for quasi-solid organic radical batteries enabling high current density applications |
| Hauptseite > Publikationsdatenbank > Combinations of polymer-based cathode and electrolyte materials for quasi-solid organic radical batteries enabling high current density applications |
| Poster (After Call) | FZJ-2024-02913 |
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2024
Abstract: In recent years, organic radical polymer-based batteries (ORBs) have attracted substantial interest and attention, primarily attributed to their remarkable features including printability and rapid discharge capabilities. The latter is bestowed by organic redox-active polymers (ORP) as pivotal constituents that afford prompt and reversible redox reactions. High-power densities of current ORBs are particularly interesting in the frame of so-called “Internet of Things” (IoT) devices that typically discharge with high currents and short-duration pulse loads for data transmission. Nevertheless, high current densities could be a strong burden of the cells and necessitate close attention to safety aspects of the battery materials. Exploitation of many liquid electrolytes, in view of high pulsed experiments, introduces inherent safety concerns due to flammability of components. Here, a polymer-based cell chemistry may be safer due to non-volatility and higher viscosity that eventually prevent hazards even upon mechanical abuse of the cells.In the present study, the suitability of selected solid and quasi-solid polymer electrolytes for operation with PTMA cathodes (Qtheo = 111 mAh g−1) and lithium anodes, respectively, is critically evaluated. Solid polymer electrolytes may be afflicted by challenges associated with poor electrical contacts, exhibiting unfavorably large cell resistances, whereas the incorporation of quasi-solid polymer electrolytes that comprise flowable components allows for establishing good electrochemical contacts at electrolyte-electrode interfaces. A carbonate-based quasi-solid polymer electrolyte showcases competitive electrochemical performances, as demonstrated by initial specific discharge capacities of more than 82 mAh g−1 at rates of up to 1C (0.1 mAh) and by successful durability of the system, even after repeated pulse discharges. The obtained insights from this study are significant towards designing highly competitive solid ORBs, also promoting exploitation of more sustainable and safer materials, in this way paving a way towards cell concepts for greener IoT applications.
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