期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 31, 页码 37123-37132出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c09067
关键词
oxygen reduction reaction; Al-air battery; plasma etching; defect; manganese oxides
资金
- National Natural Science Foundation of China [51874197]
- Natural Science Foundation of Shanghai [21ZR1429400]
This study proposes a new strategy to enhance the electrocatalytic performance of the oxygen reduction reaction on the cathode of aluminum-air batteries by synthesizing carbon nanofibers loaded with manganese oxides using oxygen plasma surface etching. The synthesized material exhibits superior performance in an alkaline electrolyte, with comparable power density to commercial Pt/C catalyst-based batteries.
The oxygen reduction reaction (ORR) with sluggish kinetics on the cathode of aluminum-air (Al-air) batteries greatly limits their further development. Here, a new strategy is proposed to synthesize oxygen and nitrogen codoped carbon nanofibers loaded with manganese oxides (MnO/Mn2O3/ONCNF-n) as an efficient electrocatalyst for ORR by using oxygen plasma surface etching. The MnO/Mn2O3/ONCNF-3 exhibit superior ORR performance in an alkaline electrolyte, which is attributed to various active sites including N and O heteroatoms, vacancies, and manganese oxides. Additionally, the fabricated homemade Al-air battery (AAB) with MnO/Mn2O3/ONCNF-3 exhibits a maximum power density of 129.7 mW cm(-2), demonstrating comparable performance to AABs based on the commercial Pt/C catalyst. This work provides a new approach of using O-2 plasma for enhancing the ORR catalytic activities of carbon materials.
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