Dipayan Mondal, Ishita Naskar, Melepurath Deepa and Ashutosh Kumar Mishra
{"title":"Bioinspired flavin analogues as organic electrode materials for supercapacitor applications†","authors":"Dipayan Mondal, Ishita Naskar, Melepurath Deepa and Ashutosh Kumar Mishra","doi":"10.1039/D4YA00001C","DOIUrl":null,"url":null,"abstract":"<p >With the increasing interest in incorporating redox-active organic molecules as potential materials in energy storage systems, we envisaged a chemical design of a naturally occurring redox-active flavin moiety. Herein, we report the fabrication and characterization of asymmetric supercapacitors (ASCs) based on modified flavins as cathode materials. Notably, subtle chemical modification with the incorporation of a carboxylic functionality around the flavin core (<strong><em>c</em>Fl</strong>) was found to impart superior ion-storage properties compared to a simple flavin derivative (<strong>Fl</strong>). As determined, the specific capacitance (SC) for <strong><em>c</em>Fl</strong> and <strong>Fl</strong> as individual electrodes was found to be 170 and 62 F g<small><sup>−1</sup></small>, respectively, whereas in a two electrode ASC with activated carbon serving as the anode, the SC was found to be 107 and 29 F g<small><sup>−1</sup></small>, respectively, at a current density of 1.25 A g<small><sup>−1</sup></small>. With better cycling stability (retaining 87% of its initial SC in the case of <strong><em>c</em>Fl</strong>) and significantly higher energy density (38 W h kg<small><sup>−1</sup></small> for <strong><em>c</em>Fl</strong>) as compared to most of the known organic material-based electrodes, the modified flavin derivatives serve as better organic electrode alternatives for practical energy storage applications.</p>","PeriodicalId":72913,"journal":{"name":"Energy advances","volume":" 7","pages":" 1710-1716"},"PeriodicalIF":3.2000,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ya/d4ya00001c?page=search","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Energy advances","FirstCategoryId":"1085","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/ya/d4ya00001c","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
With the increasing interest in incorporating redox-active organic molecules as potential materials in energy storage systems, we envisaged a chemical design of a naturally occurring redox-active flavin moiety. Herein, we report the fabrication and characterization of asymmetric supercapacitors (ASCs) based on modified flavins as cathode materials. Notably, subtle chemical modification with the incorporation of a carboxylic functionality around the flavin core (cFl) was found to impart superior ion-storage properties compared to a simple flavin derivative (Fl). As determined, the specific capacitance (SC) for cFl and Fl as individual electrodes was found to be 170 and 62 F g−1, respectively, whereas in a two electrode ASC with activated carbon serving as the anode, the SC was found to be 107 and 29 F g−1, respectively, at a current density of 1.25 A g−1. With better cycling stability (retaining 87% of its initial SC in the case of cFl) and significantly higher energy density (38 W h kg−1 for cFl) as compared to most of the known organic material-based electrodes, the modified flavin derivatives serve as better organic electrode alternatives for practical energy storage applications.