A Li–O2/CO2 battery based on bio-inspired engineering of the Bi2S3/PVP cathode

The high overpotential due to the slow kinetics of the carbon dioxide reduction reaction (CO2RR) and the carbon dioxide evolution reaction (CO2ER) greatly limits the practical application of Li–CO2 batteries. In this study, PVP/Bi2S3 is used as the cathode of a Li–CO2 battery for the first time. The...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2024-03, Vol.12 (11), p.3953-3961
Main Authors: Gao, Song, Li, Siqi, Han, Miao, Yuanlong, E, Liu, Wanqiang, Jia, Hongsheng, Wang, Fang
Format: Article
Language:English
Subjects:
Bismuth sulfides
Carbon dioxide
Cathodes
Chemical reduction
Discharge
Energy conversion
Kinetics
Lithium
Metal air batteries
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Summary:The high overpotential due to the slow kinetics of the carbon dioxide reduction reaction (CO2RR) and the carbon dioxide evolution reaction (CO2ER) greatly limits the practical application of Li–CO2 batteries. In this study, PVP/Bi2S3 is used as the cathode of a Li–CO2 battery for the first time. The introduction of PVP not only increases the generation of S vacancies, but also improves the electronic conductivity of Bi2S3. The PVP is beneficial to the generation of intermediate lithium oxalate, thereby improving CO2RR and CO2ER kinetics and reducing charge and discharge overpotentials. Therefore, the PVP/Bi2S3-based Li–CO2 battery achieves an ultra-low charging platform of 3.6 V and a high discharge platform of 2.75 V. The proposed PVP/Bi2S3 cathode can also be applied to lithium–oxygen battery systems by efficiently reducing and separating O2 and O22− providing important insights into achieving efficient energy conversion of metal–air batteries.
ISSN:2050-7526
2050-7534
DOI:10.1039/d4tc00143e