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Abstract
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 we prove the feasibility of employing
phendione - transition metal complexes for electrochemical charge storage by
taking advantage of the reversible redox of both, carbonyl groups and transition
metal center, contributing thus to augmented charge storage. Interestingly, the
chemistry of the counter ion in the studied complexes effectively tunes the solubility
and improves the cycling stability. Whereas 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.
