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Reversible Anion Insertion in Molecular Phenothiazine-Based Redox-Active Positive Material for Organic Ion Batteries

Abstract : The increasing demand for rechargeable batteries induces the development of greener and better devices. Significant advances have been made in the last decade together with a renewed interest in organic electrode materials. Thus, stable electron-donating organic materials are candidates for ``greener'' molecular batteries (metal-free). Herein, we report the design of a monomeric p-type N-substituted phenothiazine salt as an efficient anionic host structure working reversibly in a dual-ion cell configuration using lithium as the negative electrode. Investigation of different electrolyte salts, LiClO4, LiPF6, and LiTFSI in PC (propylene carbonate), reveals that lithium 4-(10H-phenothiazin-10-yl) benzoate (LiPHB) exhibits a high operating potential (approximate to 3.7 vs. Li+/Li) corresponding to a one-electron process with a reversible specific capacity of 86 mAh g(-1) in a LiClO4-based electrolyte, exhibiting an extraordinary cycling stability over 500 cycles at 0.2 C. Such impressive results are rendering LiPHB a promising scaffold for developing next-generation molecular organic batteries.
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Soumis le : jeudi 17 mars 2022 - 11:02:45
Dernière modification le : mardi 27 septembre 2022 - 04:18:00

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Murugesan Rajesh, Franck Dolhem, Carine Davoisne, Matthieu Becuwe. Reversible Anion Insertion in Molecular Phenothiazine-Based Redox-Active Positive Material for Organic Ion Batteries. ChemSusChem, ChemPubSoc Europe/Wiley, 2020, 13 (9, SI), pp.2364-2370. ⟨10.1002/cssc.201903559⟩. ⟨hal-03611506⟩

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