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- Title
Molecular Engineering of Redox Couples for Non-Aqueous Redox Flow Batteries.
- Authors
Davis, Casey M.; Boronski, Claire E.; Yang, Tianyi; Liu, Tuo; Liang, Zhiming
- Abstract
Redox flow batteries (RFBs) have attracted significant attention as a promising electrochemical energy storage technology, offering various advantages such as grid-scale electricity production with variable intermittent electricity delivery, enhanced safety compared to metal-ion batteries, decoupled energy and power density, and simplified manufacturing processes. For this review, we exclusively focus on organic, non-aqueous redox flow batteries. Specifically, we address the most recent progress and the major challenges related to the design and synthesis of robust redox-active organic compounds. An extensive examination of the synthesis and characterization of a wide spectrum of redox-active molecules, focusing particularly on derivatives of posolytes such as quinone, nitroxyl radicals, dialkoxybenzenes, and phenothiazine and negolytes such as viologen and pyridiniums, is provided. We explore the incorporation of various functional groups as documented in the references, aiming to enhance the chemical and electrochemical stability, as well as the solubility, of both the neutral and radical states of redox-active molecules. Additionally, we offer a comprehensive assessment of the cell-cycling performance exhibited by these redox-active molecules.
- Subjects
FLOW batteries; OXIDATION-reduction reaction; CHEMICAL stability; POWER density; QUINONE derivatives; QUINONE; NITROXYL; SODIUM ions
- Publication
Batteries, 2023, Vol 9, Issue 10, p504
- ISSN
2313-0105
- Publication type
Article
- DOI
10.3390/batteries9100504