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Recent Progress on Catalysts for the Positive Electrode of Aprotic Lithium-Oxygen Batteries

Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center (RECAST), College of Chemistry, Nankai University, Tianjin 300071, China
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Author to whom correspondence should be addressed.
Dedicated to the 100th anniversary of Nankai University.
These authors contributed equally.
Inorganics 2019, 7(6), 69; https://doi.org/10.3390/inorganics7060069
Received: 29 April 2019 / Revised: 23 May 2019 / Accepted: 24 May 2019 / Published: 28 May 2019
(This article belongs to the Special Issue Electrochemical Energy Storage: Beyond Li-ion Technology)
Rechargeable aprotic lithium-oxygen (Li-O2) batteries have attracted significant interest in recent years owing to their ultrahigh theoretical capacity, low cost, and environmental friendliness. However, the further development of Li-O2 batteries is hindered by some ineluctable issues, such as severe parasitic reactions, low energy efficiency, poor rate capability, short cycling life and potential safety hazards, which mainly stem from the high charging overpotential in the positive electrode side. Thus, it is of great significance to develop high-performance catalysts for the positive electrode in order to address these issues and to boost the commercialization of Li-O2 batteries. In this review, three main categories of catalyst for the positive electrode of Li-O2 batteries, including carbon materials, noble metals and their oxides, and transition metals and their oxides, are systematically summarized and discussed. We not only focus on the electrochemical performance of batteries, but also pay more attention to understanding the catalytic mechanism of these catalysts for the positive electrode. In closing, opportunities for the design of better catalysts for the positive electrode of high-performance Li-O2 batteries are discussed. View Full-Text
Keywords: Li-O2 batteries; positive-electrode catalysts; carbon materials; noble metals; transition metals Li-O2 batteries; positive-electrode catalysts; carbon materials; noble metals; transition metals
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MDPI and ACS Style

Cai, Y.; Hou, Y.; Lu, Y.; Chen, J. Recent Progress on Catalysts for the Positive Electrode of Aprotic Lithium-Oxygen Batteries . Inorganics 2019, 7, 69.

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