Zhen Xu, Grace Mapstone, Zeke Coady, Mengnan Wang, Tristan L. Spreng, Xinyu Liu, Davide Molino, Alexander C. Forse
{"title":"Enhancing electrochemical carbon dioxide capture with supercapacitors","authors":"Zhen Xu, Grace Mapstone, Zeke Coady, Mengnan Wang, Tristan L. Spreng, Xinyu Liu, Davide Molino, Alexander C. Forse","doi":"10.1038/s41467-024-52219-3","DOIUrl":null,"url":null,"abstract":"<p>Supercapacitors are emerging as energy-efficient and robust devices for electrochemical CO<sub>2</sub> capture. However, the impacts of electrode structure and charging protocols on CO<sub>2</sub> capture performance remain unclear. Therefore, this study develops structure-property-performance correlations for supercapacitor electrodes at different charging conditions. We find that electrodes with large surface areas and low oxygen functionalization generally perform best, while a combination of micro- and mesopores is important to achieve fast CO<sub>2</sub> capture rates. With these structural features and tunable charging protocols, YP80F activated carbon electrodes show the best CO<sub>2</sub> capture performance with a capture rate of 350 mmol<sub>CO2</sub> kg<sup>–1</sup> h<sup>–1</sup> and a low electrical energy consumption of 18 kJ mol<sub>CO2</sub><sup>–1</sup> at 300 mA g<sup>–1</sup> under CO<sub>2</sub>, together with a long lifetime over 12000 cycles at 150 mA g<sup>–1</sup> under CO<sub>2</sub> and excellent CO<sub>2</sub> selectivity over N<sub>2</sub> and O<sub>2</sub>. Operated in a “positive charging mode”, the system achieves excellent electrochemical reversibility with Coulombic efficiencies over 99.8% in the presence of approximately 15% O<sub>2,</sub> alongside stable cycling performance over 1000 cycles. This study paves the way for improved supercapacitor electrodes and charging protocols for electrochemical CO<sub>2</sub> capture.</p>","PeriodicalId":19066,"journal":{"name":"Nature Communications","volume":null,"pages":null},"PeriodicalIF":14.7000,"publicationDate":"2024-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nature Communications","FirstCategoryId":"103","ListUrlMain":"https://doi.org/10.1038/s41467-024-52219-3","RegionNum":1,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MULTIDISCIPLINARY SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
Supercapacitors are emerging as energy-efficient and robust devices for electrochemical CO2 capture. However, the impacts of electrode structure and charging protocols on CO2 capture performance remain unclear. Therefore, this study develops structure-property-performance correlations for supercapacitor electrodes at different charging conditions. We find that electrodes with large surface areas and low oxygen functionalization generally perform best, while a combination of micro- and mesopores is important to achieve fast CO2 capture rates. With these structural features and tunable charging protocols, YP80F activated carbon electrodes show the best CO2 capture performance with a capture rate of 350 mmolCO2 kg–1 h–1 and a low electrical energy consumption of 18 kJ molCO2–1 at 300 mA g–1 under CO2, together with a long lifetime over 12000 cycles at 150 mA g–1 under CO2 and excellent CO2 selectivity over N2 and O2. Operated in a “positive charging mode”, the system achieves excellent electrochemical reversibility with Coulombic efficiencies over 99.8% in the presence of approximately 15% O2, alongside stable cycling performance over 1000 cycles. This study paves the way for improved supercapacitor electrodes and charging protocols for electrochemical CO2 capture.
期刊介绍:
Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.