Reversible Anion Insertion in Molecular Phenothiazine‐Based Redox‐Active Positive Material for Organic Ion Batteries. Issue 9 (14th April 2020)

• Record Type: Journal Article
• Authors: Rajesh, Murugesan; Dolhem, Franck; Davoisne, Carine; Becuwe, Matthieu
• Is Part Of: ChemSusChem. Volume 13:Issue 9(2020)
• Page Start: 2364
• Page End: 2370
• Publication Date: 2020-04-14
• Subjects: batteries -- dual-ion -- organic electrode -- phenothiazine -- p-type; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.201903559
• Languages: English
• ISSNs: 1864-5631

Abstract

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‐(10 H ‐phenothiazin‐10‐yl) benzoate (LiPHB) exhibits a high operating potential (≈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. Abstract : So new, so green, phenothiazine : A one‐electron‐donating phenothiazine derivative is prepared for the first time and used as a non‐polymeric solid‐state stable organic cathode with a reversible specific capacity of 86 mAh g −1 in LiClO4 /propylene carbonate and extraordinary cycling stability over 500 cycles at 0.2 C.