Phendione–Transition‐Metal Complexes with Bipolar Redox Activity for Lithium Batteries

1,10‐Phenanthroline‐5,6‐dione (phendione)‐based transition‐metal complexes are known for their use in pharmacological and catalysis applications. However, their application in electrochemical energy storage has not been investigated thus far. Herein, the feasibility of employing phendione–transition...

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Veröffentlicht in:ChemSusChem 2020-05, Vol.13 (9), p.2225-2231
Hauptverfasser: Lakraychi, Alae Eddine, De Kreijger, Simon, Gupta, Deepak, Elias, Benjamin, Vlad, Alexandru
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Sprache:eng
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Zusammenfassung:1,10‐Phenanthroline‐5,6‐dione (phendione)‐based transition‐metal complexes are known for their use in pharmacological and catalysis applications. However, their application in electrochemical energy storage has not been investigated thus far. Herein, the feasibility of employing phendione–transition‐metal complexes was investigated for electrochemical charge storage by taking advantage of the reversible redox activity of both carbonyl groups and transition metal center, contributing to augmented charge storage. Interestingly, the chemistry of the counter ion in the studied complexes effectively tuned the solubility and improved the cycling stability. Although further studies are required to limit the solubility and active‐species shuttle, this study explores the bottlenecks of phendione–transition‐metal complexes as electrode materials for solid‐electrode‐format batteries. Seven for all batteries: 7‐electron charge storage through the bipolar redox activity in phendione–transition‐metal complexes is reported. Transition‐metal and counter‐anion chemistry are found to significantly influence the redox potential and cycling stability.
ISSN:1864-5631
1864-564X
DOI:10.1002/cssc.201903290