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29 April 2022 Strategies of promotion solution growth mechanism in Aprotic Li-O2 batteries
Tongwanming Zheng
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Proceedings Volume 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022); 122552X (2022) https://doi.org/10.1117/12.2639367
Event: 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 2022, Chongqing, China
Abstract
Owing to the high theoretical specific energy, lithium-O2 batteries have been considered as promising new energy sources beyond conventional Li-ion batteries. One of the challenges of a Li-O2 battery is that the desired discharge product Li2O2 forms as a thin and insulating film on the electrode surface, which leads to large overpotential, low discharge capacity, and early cell death. Here, I summarize the strategies of promoting the solution growth of toroidal Li2O2 particles: high donor number electrolyte solvents and electrolyte salts have been shown to ensure the growth of toroidal Li2O2 particles in solution; additives such as derivatives based on anthraquinones with electron-withdrawing groups and water have also been suggested. Each strategy has its benefits and drawbacks, which needs a further understanding of the individual system. Until now, the methods of promoting solution growth of Li2O2 toroids in Li-O2 batteries are still in research.
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Tongwanming Zheng "Strategies of promotion solution growth mechanism in Aprotic Li-O2 batteries", Proc. SPIE 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 122552X (29 April 2022); https://doi.org/10.1117/12.2639367
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KEYWORDS
Lithium
Electrodes
Ions
Oxygen
Scanning electron microscopy
Thin films
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