{"title":"化不利为有利:研究有机氧化还原流电池中羧酸官能化蒽醌的容量衰减模式","authors":"Richa Gupta, and , Kothandaraman Ramanujam*, ","doi":"10.1021/acsaem.4c0112310.1021/acsaem.4c01123","DOIUrl":null,"url":null,"abstract":"<p >Organic redox-molecule-based flow batteries (ORFB) are considered a potential alternative to the inorganic counterparts in flow battery systems as, technically speaking, organic materials are ubiquitous and can be synthesized anywhere. Nevertheless, they were also known to degrade in a multitude of ways in flow battery ambience. In this study, 4,4′-((9,10-dioxo-9,10-dihydroanthracene-1,5-diyl)bis(oxy))dibutyric acid (1,5-DCAQ) is used as an anolyte in alkaline media. As carboxylate interacts intramolecularly with the carbonyl group of 1,5-DCAQ, the aromatic portion of the molecule exhibits an association with the Nafion membrane separator through lipophilic interaction, causing capacity decay of the cell. We have modified this curse into a boon by functionalizing the thermally activated graphite felt anode with the Nafion ionomer, thereby retaining the redox molecule around the electrode instead of the membrane, achieving 99.9% of theoretical capacity and 95% Coulombic efficiency at 15 mA cm<sup>–2</sup> current density. As this molecule exhibits a solubility of 0.5 M, the system with suitable optimization is expected to deliver a solubility of up to 26.8 Ah L<sup>–1</sup>.</p>","PeriodicalId":4,"journal":{"name":"ACS Applied Energy Materials","volume":"7 18","pages":"7737–7744 7737–7744"},"PeriodicalIF":5.4000,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Turning Adversity into Advantage: Investigating the Capacity Decay Mode of Carboxylate Functionalized-Anthraquinone in Organic Redox Flow Batteries\",\"authors\":\"Richa Gupta, and , Kothandaraman Ramanujam*, \",\"doi\":\"10.1021/acsaem.4c0112310.1021/acsaem.4c01123\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Organic redox-molecule-based flow batteries (ORFB) are considered a potential alternative to the inorganic counterparts in flow battery systems as, technically speaking, organic materials are ubiquitous and can be synthesized anywhere. Nevertheless, they were also known to degrade in a multitude of ways in flow battery ambience. In this study, 4,4′-((9,10-dioxo-9,10-dihydroanthracene-1,5-diyl)bis(oxy))dibutyric acid (1,5-DCAQ) is used as an anolyte in alkaline media. As carboxylate interacts intramolecularly with the carbonyl group of 1,5-DCAQ, the aromatic portion of the molecule exhibits an association with the Nafion membrane separator through lipophilic interaction, causing capacity decay of the cell. We have modified this curse into a boon by functionalizing the thermally activated graphite felt anode with the Nafion ionomer, thereby retaining the redox molecule around the electrode instead of the membrane, achieving 99.9% of theoretical capacity and 95% Coulombic efficiency at 15 mA cm<sup>–2</sup> current density. As this molecule exhibits a solubility of 0.5 M, the system with suitable optimization is expected to deliver a solubility of up to 26.8 Ah L<sup>–1</sup>.</p>\",\"PeriodicalId\":4,\"journal\":{\"name\":\"ACS Applied Energy Materials\",\"volume\":\"7 18\",\"pages\":\"7737–7744 7737–7744\"},\"PeriodicalIF\":5.4000,\"publicationDate\":\"2024-09-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"ACS Applied Energy Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://pubs.acs.org/doi/10.1021/acsaem.4c01123\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Energy Materials","FirstCategoryId":"88","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsaem.4c01123","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Turning Adversity into Advantage: Investigating the Capacity Decay Mode of Carboxylate Functionalized-Anthraquinone in Organic Redox Flow Batteries
Organic redox-molecule-based flow batteries (ORFB) are considered a potential alternative to the inorganic counterparts in flow battery systems as, technically speaking, organic materials are ubiquitous and can be synthesized anywhere. Nevertheless, they were also known to degrade in a multitude of ways in flow battery ambience. In this study, 4,4′-((9,10-dioxo-9,10-dihydroanthracene-1,5-diyl)bis(oxy))dibutyric acid (1,5-DCAQ) is used as an anolyte in alkaline media. As carboxylate interacts intramolecularly with the carbonyl group of 1,5-DCAQ, the aromatic portion of the molecule exhibits an association with the Nafion membrane separator through lipophilic interaction, causing capacity decay of the cell. We have modified this curse into a boon by functionalizing the thermally activated graphite felt anode with the Nafion ionomer, thereby retaining the redox molecule around the electrode instead of the membrane, achieving 99.9% of theoretical capacity and 95% Coulombic efficiency at 15 mA cm–2 current density. As this molecule exhibits a solubility of 0.5 M, the system with suitable optimization is expected to deliver a solubility of up to 26.8 Ah L–1.
期刊介绍:
ACS Applied Energy Materials is an interdisciplinary journal publishing original research covering all aspects of materials, engineering, chemistry, physics and biology relevant to energy conversion and storage. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important energy applications.