Please use this identifier to cite or link to this item:
https://doi.org/10.1002/aenm.202103622
Title: | Redox-Mediated Two-Electron Oxygen Reduction Reaction with Ultrafast Kinetics for Zn-Air Flow Battery | Authors: | Huang, Shiqiang Zhang, Hang Zhuang, Jiahao Zhou, Mingyue Gao, Mengqi Zhang, Feifei Wang, Qing |
Keywords: | Science & Technology Physical Sciences Technology Chemistry, Physical Energy & Fuels Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics homogeneous catalysis oxygen reduction reaction peroxide ultrafast kinetics Zn-air batteries CHALLENGES ELECTRODES CATALYSTS CARBON |
Issue Date: | 21-Jan-2022 | Publisher: | WILEY-V C H VERLAG GMBH | Citation: | Huang, Shiqiang, Zhang, Hang, Zhuang, Jiahao, Zhou, Mingyue, Gao, Mengqi, Zhang, Feifei, Wang, Qing (2022-01-21). Redox-Mediated Two-Electron Oxygen Reduction Reaction with Ultrafast Kinetics for Zn-Air Flow Battery. ADVANCED ENERGY MATERIALS 12 (10). ScholarBank@NUS Repository. https://doi.org/10.1002/aenm.202103622 | Abstract: | Rechargeable Zn–air batteries (ZABs) as high-energy density and cost-effective power sources for next generation energy storage have attracted considerable attention. However, the sluggish oxygen electrochemistry leads to high polarization of the air electrode during charge/discharge and consequently a low round-trip energy efficiency of the cell. Here it is shown that the two-electron oxygen redox chemistry enabled by a redox mediator, anthraquinone-2,7-disulfonic acid disodium salt (AQDS), can effectively boost the performance of ZABs. The kinetics and underlying mechanism of the AQDS-mediated oxygen reduction reaction at different pH are scrutinized both computationally and experimentally to delineate the reaction pathways and rate-limiting step. An ultrafast catalytic rate constant of 2.53 × 106 s–1 is achieved at a pH of 13.13 and based on a flow cell configuration, the AQDS-mediated Zn–air flow battery demonstrates considerably enhanced energy efficiency of 85% at 10 mA cm−2. | Source Title: | ADVANCED ENERGY MATERIALS | URI: | https://scholarbank.nus.edu.sg/handle/10635/225096 | ISSN: | 1614-6832 1614-6840 |
DOI: | 10.1002/aenm.202103622 |
Appears in Collections: | Staff Publications Elements |
Show full item record
Files in This Item:
File | Description | Size | Format | Access Settings | Version | |
---|---|---|---|---|---|---|
Redox-Mediated Two-Electron Oxygen Reduction Reaction with Ultrafast Kinetics for Zn-Air Flow Battery.pdf | Accepted version | 2.2 MB | Adobe PDF | OPEN | None | View/Download |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.