NaOH as an Aqueous Electrolyte to Improve the Performance of Electric Double-Layer Capacitors—A Molecular Dynamics Study
Aqueous electrolytes are widely used in supercapacitors (SCs) because of their high stability, wide voltage window, and safety features at elevated temperatures. Among alkaline electrolytes, KOH is most commonly used, and other electrolytes are less addressed. In this work, we meticulously investiga...
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MDPI AG
2025-04-01
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| author | Lifeng Ni Jin Yu |
| author_facet | Lifeng Ni Jin Yu |
| author_sort | Lifeng Ni |
| collection | DOAJ |
| description | Aqueous electrolytes are widely used in supercapacitors (SCs) because of their high stability, wide voltage window, and safety features at elevated temperatures. Among alkaline electrolytes, KOH is most commonly used, and other electrolytes are less addressed. In this work, we meticulously investigated the diffusion behavior of Na+ and K+ in aqueous electrolytes going through hierarchical porous activated carbon materials by employing molecular dynamic simulations. Our results show that the diffusion coefficient of NaOH is much larger than that of KOH under different concentrations, electric fields, and temperatures. We attributed this to the radical of ions going through the mesopores with layered structures. The advantage of high diffusion and low cost of NaOH electrolyte suggests that it could be a potential candidate to improve the performance of SCs. |
| format | Article |
| id | doaj-art-c28165e67c8e484aa4cc928cd5c2b1bd |
| institution | Kabale University |
| issn | 2079-4991 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj-art-c28165e67c8e484aa4cc928cd5c2b1bd2025-08-20T03:49:22ZengMDPI AGNanomaterials2079-49912025-04-0115964910.3390/nano15090649NaOH as an Aqueous Electrolyte to Improve the Performance of Electric Double-Layer Capacitors—A Molecular Dynamics StudyLifeng Ni0Jin Yu1Shanghai Key Laboratory of Mechanics in Energy Engineering, School of Mechanics and Engineering Science, Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai Frontier Science Center of Mechanoinformatics, Shanghai 200072, ChinaShanghai Key Laboratory of Mechanics in Energy Engineering, School of Mechanics and Engineering Science, Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai Frontier Science Center of Mechanoinformatics, Shanghai 200072, ChinaAqueous electrolytes are widely used in supercapacitors (SCs) because of their high stability, wide voltage window, and safety features at elevated temperatures. Among alkaline electrolytes, KOH is most commonly used, and other electrolytes are less addressed. In this work, we meticulously investigated the diffusion behavior of Na+ and K+ in aqueous electrolytes going through hierarchical porous activated carbon materials by employing molecular dynamic simulations. Our results show that the diffusion coefficient of NaOH is much larger than that of KOH under different concentrations, electric fields, and temperatures. We attributed this to the radical of ions going through the mesopores with layered structures. The advantage of high diffusion and low cost of NaOH electrolyte suggests that it could be a potential candidate to improve the performance of SCs.https://www.mdpi.com/2079-4991/15/9/649NaOH electrolyteelectric double layersupercapacitors |
| spellingShingle | Lifeng Ni Jin Yu NaOH as an Aqueous Electrolyte to Improve the Performance of Electric Double-Layer Capacitors—A Molecular Dynamics Study Nanomaterials NaOH electrolyte electric double layer supercapacitors |
| title | NaOH as an Aqueous Electrolyte to Improve the Performance of Electric Double-Layer Capacitors—A Molecular Dynamics Study |
| title_full | NaOH as an Aqueous Electrolyte to Improve the Performance of Electric Double-Layer Capacitors—A Molecular Dynamics Study |
| title_fullStr | NaOH as an Aqueous Electrolyte to Improve the Performance of Electric Double-Layer Capacitors—A Molecular Dynamics Study |
| title_full_unstemmed | NaOH as an Aqueous Electrolyte to Improve the Performance of Electric Double-Layer Capacitors—A Molecular Dynamics Study |
| title_short | NaOH as an Aqueous Electrolyte to Improve the Performance of Electric Double-Layer Capacitors—A Molecular Dynamics Study |
| title_sort | naoh as an aqueous electrolyte to improve the performance of electric double layer capacitors a molecular dynamics study |
| topic | NaOH electrolyte electric double layer supercapacitors |
| url | https://www.mdpi.com/2079-4991/15/9/649 |
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