Validating the reversible redox of alkali-ion disulfonyl-methanide as organic positive electrode materials. (March 2023)

• Record Type: Journal Article
• Authors: Zhang, Y.; Apostol, P.; Guo, X.; Liu, X.; Rambabu, D.; Wang, J.; Chen, X.; Vlad, A.
• Is Part Of: Materials today chemistry. Volume 28(2023)
• Publication Date: 2023-03
• Subjects: Organic battery -- Aromatic disulfonyl-methanide -- Alkali-ion storage -- Cathode; Chemistry -- Periodicals; Materials -- Research -- Periodicals; Materials science -- Periodicals; Chemistry; Materials -- Research; Electronic journals; Periodicals; 660.282
• DOI: 10.1016/j.mtchem.2023.101379
• Languages: English
• ISSNs: 2468-5194

Abstract

Abstract: Alkali-ion reservoir organic positive electrode materials with high redox potential emerge as promising candidates for rocking-chair batteries. Despite recent major advances on coordinated Li-enolates and conjugated Li-sulfonamides, alike chemistries remain rare with clearly enormous room to explore and investigate. Herein, we report a new high-voltage redox functionality for alkali-ion storage based on aromatic di-sulfonyl methanide. The versatile paradigm chemistry of di-alkali p -phenylene-bis-diethylsulfonyl methanide (denoted as A2 - p -TESO2, where A = Li +, Na +, K + ) displays high voltage (3.13 vs Li + /Li), a two-electron reversible redox in both liquid phase and solid phase electrochemistry. A2 - p -TESO2 also shows great stability under ambient air conditions in their alkali-ion reservoir states. This work not only suggests a new charge storage mechanism for organic batteries but also highlights the versatility of organic chemistry in designing new redox functionalities for next-generation organic rechargeable batteries. Highlights: A new redox chemistry based on aromatic di-sulfonyl methanide is proposed for high performance alkali-ion storage. The disclosed chemistries display two-electron reversible redox, high voltage, and enhanced stability under ambient air conditions. This work also highlights the chemically versatile of organic electrode materials.