Insights into Solid-State Electrochemistry of bi-Redox Organic Battery Materials
(2019) Organic Battery Days 2019 — Location: Jena (Germany) (3.June.2019)
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- Carbonyl compounds have been clearly recognized as the most promising electroactive materials for organic batteries[1]. In this context, molecular engineering has played a big part in improving the electrochemical performances in terms of tuning the potential[2] and preventing the solubility[3]. However, these improvements partially penalize the gravimetric capacities and the exact origin of the redox potential shift as well as redox mechanism are still matter of debates. In this work, we will try to address both issues. First, we will detail on the electrochemistry of aromatic and heterocyclic dicarboxylate isomers. This study comprehends (i) the effect of N-heteroatom on the potential of the dicarboxylates, with a direct correlation between the potential and the 13C-chemical and vibration frequency shift of the carbonyl and (ii) the redox mechanism unveiling the structural requirements that dictates the electrochemical activity of either dicarboxylate or the pyrazine redox units. Secondly, we will show how by using coordination chemistry, new multi-electron materials with bi-polar redox activity can be designed. The materials can deliver capacities in excess of 200 mAh.g-1 at an average working (reduction) potential of 3 V (vs. Li+/Li0). References : [1] S. Muench, A. Wild, C. Friebe, B. Häupler, T. Janoschka, U. S. Schubert, Chem. Rev. 2016, 116, 9438-948. [2] A. E. Lakraychi et al., J of Mater Chem A. 2018, 6, 19182 [3] L. Sieuw et al., Chem Sci. 2019, 10, 418.
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Lakraychi, A. E., De Kreijger, S., Schwartz, P., Gupta, D., Elias, B., & Vlad, A. (2019). Insights into Solid-State Electrochemistry of bi-Redox Organic Battery Materials. Organic Battery Days 2019, Jena (Germany). https://hdl.handle.net/2078.5/226989