KMS Chongqing Institute of Green and Intelligent Technology, CAS
| Monodispersed Eu2O3-Modified Fe3O4@NCG Composites as Highly Efficient and Ultra-stable Catalysts for Rechargeable Zn-Air Batteries | |
Chen, Cheng1; Long, Jilan1 ; Shen, Kui2; Liu, Xiaohong3; Zhang, Wei4
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| 2022-08-17 | |
| 摘要 | Constructing highly efficient cathode catalysts for Zn-air batteries (ZABs) is an attractive research topic in sustainable energy storage area. Herein, the rare-earth metal oxide modification strategy has been proposed to construct the highly efficient and ultra-stable catalysts for ZABs. Accordingly, a graphene oxide-doped carbon-supported Eu2O3-modified Fe3O4 (Fe3O4/Eu2O3@NCG) catalyst is developed with layered Fe-Eu-MOF/GO as a precursor. Detailed characterization reveals that Fe3O4/Eu2O3@NCG possesses unique structural properties, including carbon-metal-carbon configuration, plentiful oxygen vacancies, and variable metal-active sites, which endows the catalyst with strong conductivity, high activity, and ultra-long stability. The optimal Fe3O4/Eu2O3@NCG catalyst exhibits an outstanding electrochemical performance, and the potential difference (Egap) between oxygen reduction reaction and oxygen evolution reaction is merely 0.68 V at 0.1 M KOH condition. Moreover, density functional theory calculations are employed to investigate the reaction mechanism and the synergetic effect between Fe and Eu atoms. Most importantly, the Fe3O4/Eu2O3@NCG-based aqueous ZAB delivers a high power density (218 mW/cm(2)), specific capacity (854 mA h/g@5 mA/cm(2)), and an impressive ultra-long cycle property with more than 1000 h (> 6000 cycles) charge-discharge cycle life. In addition, the Fe3O4/Eu2O3@NCG-based all-solid-state ZAB also exhibits an outstanding performance, achieving > 460 h cycle life (> 2760 cycles) and strong practical application capability. |
| 关键词 | graphene oxide metal-organic frameworks europium oxide Fe-based nanoparticles bifunctional catalysts rechargeable Zn-air batteries |
| DOI | 10.1021/acsami.2c07373 |
| 发表期刊 | ACS APPLIED MATERIALS & INTERFACES
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| ISSN | 1944-8244 |
| 页码 | 12 |
| 通讯作者 | Long, Jilan(xlong612@126.com) ; Zhang, Wei(zhangwei@cigit.ac.cn) |
| 收录类别 | SCI |
| WOS记录号 | WOS:000874852100001 |
| 语种 | 英语 |
