Organic Small-Molecule Electrodes: Emerging Organic Composite Materials in Supercapacitors for Efficient Energy Storage
Organic small molecules with electrochemically active and reversible redox groups are excellent candidates for energy storage systems due to their abundant natural origin and design flexibility. However, their practical application is generally limited by inherent electrical insulating properties an...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/27/22/7692 |
| _version_ | 1797464518922600448 |
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| author | Yuanyuan He Qiaoqiao Wei Ning An Congcong Meng Zhongai Hu |
| author_facet | Yuanyuan He Qiaoqiao Wei Ning An Congcong Meng Zhongai Hu |
| author_sort | Yuanyuan He |
| collection | DOAJ |
| description | Organic small molecules with electrochemically active and reversible redox groups are excellent candidates for energy storage systems due to their abundant natural origin and design flexibility. However, their practical application is generally limited by inherent electrical insulating properties and high solubility. To achieve both high energy density and power density, organic small molecules are usually immobilized on the surface of a carbon substrate with a high specific surface area and excellent electrical conductivity through non-covalent interactions or chemical bonds. The resulting composite materials are called organic small-molecule electrodes (OMEs). The redox reaction of OMEs occurs near the surface with fast kinetic and higher utilization compared to storing charge through diffusion-limited Faraday reactions. In the past decade, our research group has developed a large number of novel OMEs with different connections or molecular skeletons. This paper introduces the latest development of OMEs for efficient energy storage. Furthermore, we focus on the design motivation, structural advantages, charge storage mechanism, and various electrode parameters of OMEs. With small organic molecules as the active center, OMEs can significantly improve the energy density at low molecular weight through proton-coupled electron transfer, which is not limited by lattice size. Finally, we outline possible trends in the rational design of OMEs toward high-performance supercapacitors. |
| first_indexed | 2024-03-09T18:08:19Z |
| format | Article |
| id | doaj.art-cefdf7d57ae6426c9af370023b1148b6 |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-03-09T18:08:19Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-cefdf7d57ae6426c9af370023b1148b62023-11-24T09:19:31ZengMDPI AGMolecules1420-30492022-11-012722769210.3390/molecules27227692Organic Small-Molecule Electrodes: Emerging Organic Composite Materials in Supercapacitors for Efficient Energy StorageYuanyuan He0Qiaoqiao Wei1Ning An2Congcong Meng3Zhongai Hu4College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, ChinaCollege of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, ChinaCollege of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, ChinaCollege of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, ChinaCollege of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, ChinaOrganic small molecules with electrochemically active and reversible redox groups are excellent candidates for energy storage systems due to their abundant natural origin and design flexibility. However, their practical application is generally limited by inherent electrical insulating properties and high solubility. To achieve both high energy density and power density, organic small molecules are usually immobilized on the surface of a carbon substrate with a high specific surface area and excellent electrical conductivity through non-covalent interactions or chemical bonds. The resulting composite materials are called organic small-molecule electrodes (OMEs). The redox reaction of OMEs occurs near the surface with fast kinetic and higher utilization compared to storing charge through diffusion-limited Faraday reactions. In the past decade, our research group has developed a large number of novel OMEs with different connections or molecular skeletons. This paper introduces the latest development of OMEs for efficient energy storage. Furthermore, we focus on the design motivation, structural advantages, charge storage mechanism, and various electrode parameters of OMEs. With small organic molecules as the active center, OMEs can significantly improve the energy density at low molecular weight through proton-coupled electron transfer, which is not limited by lattice size. Finally, we outline possible trends in the rational design of OMEs toward high-performance supercapacitors.https://www.mdpi.com/1420-3049/27/22/7692organic small-molecule electrodesenergy storagesupercapacitorsredox activity |
| spellingShingle | Yuanyuan He Qiaoqiao Wei Ning An Congcong Meng Zhongai Hu Organic Small-Molecule Electrodes: Emerging Organic Composite Materials in Supercapacitors for Efficient Energy Storage Molecules organic small-molecule electrodes energy storage supercapacitors redox activity |
| title | Organic Small-Molecule Electrodes: Emerging Organic Composite Materials in Supercapacitors for Efficient Energy Storage |
| title_full | Organic Small-Molecule Electrodes: Emerging Organic Composite Materials in Supercapacitors for Efficient Energy Storage |
| title_fullStr | Organic Small-Molecule Electrodes: Emerging Organic Composite Materials in Supercapacitors for Efficient Energy Storage |
| title_full_unstemmed | Organic Small-Molecule Electrodes: Emerging Organic Composite Materials in Supercapacitors for Efficient Energy Storage |
| title_short | Organic Small-Molecule Electrodes: Emerging Organic Composite Materials in Supercapacitors for Efficient Energy Storage |
| title_sort | organic small molecule electrodes emerging organic composite materials in supercapacitors for efficient energy storage |
| topic | organic small-molecule electrodes energy storage supercapacitors redox activity |
| url | https://www.mdpi.com/1420-3049/27/22/7692 |
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