| Autor: |
Hong‐Bo Zhang, Yu Meng, Hong Zhong, Lili Zhang, Shichao Ding, Lingzhe Fang, Tao Li, Yi Mei, Peng‐Xiang Hou, Chang Liu, Scott P. Beckman, Yuehe Lin, Hui‐Ming Cheng, Jin‐Cheng Li |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Carbon Energy, Vol 5, Iss 5, Pp n/a-n/a (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2637-9368 |
| DOI: |
10.1002/cey2.289 |
| Popis: |
Abstract The keen interest in fuel cells and metal‐air batteries stimulates a great deal of research on the development of a cost‐efficient and high‐performance catalyst as an alternative to traditional Pt to boost the sluggish oxygen reduction reaction (ORR) at the cathode. Herein, we report a facile and scalable strategy for the large‐scale preparation of a free‐standing and flexible porous atomically dispersed Fe–N‐doped carbon microtube (FeSAC/PCMT) sponge. Benefiting from its unique structure that greatly facilitates the catalytic kinetics, mass transport, and electron transfer, our FeSAC/PCMT electrode exhibits excellent performance with an ORR potential of 0.942 V at −3 mA cm−2. When the FeSAC/PCMT sponge was directly used as an oxygen electrode for liquid‐state and flexible solid‐state zinc‐air batteries, high peak power densities of 183.1 and 58.0 mW cm−2 were respectively achieved, better than its powdery counterpart and commercial Pt/C catalyst. Experimental and theoretical investigation results demonstrate that such ultrahigh ORR performance can be attributed to atomically dispersed Fe–N5 species in FeSAC/PCMT. This study presents a cost‐effective and scalable strategy for the fabrication of highly efficient and flexible oxygen electrodes, provides a significant new insight into the catalytic mechanisms, and helps to realize significant advances in energy devices. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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