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Reversible Anion Insertion in Molecular Phenothiazine‐Based Redox‐Active Positive Material for Organic Ion Batteries
Author(s) -
Rajesh Murugesan,
Dolhem Franck,
Davoisne Carine,
Becuwe Matthieu
Publication year - 2020
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201903559
Subject(s) - electrolyte , lithium (medication) , propylene carbonate , organic radical battery , chemistry , inorganic chemistry , redox , salt (chemistry) , molecular engineering , phenothiazine , electrode , combinatorial chemistry , materials science , organic chemistry , endocrinology , medicine , pharmacology
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, LiClO 4 , LiPF 6 , 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 LiClO 4 ‐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.