期刊
ELECTROCHIMICA ACTA
卷 412, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2022.140097
关键词
Air electrode; Perovskite; Yolk-shell structure; Spray pyrolysis; Lithium-oxygen battery
资金
- Korea Institute of Energy Technology Evaluation and Planning of Ministry of Trade, Industry and Energy [20172420108680]
- Technology Innovation Program - Ministry of Trade, Industry Energy [20011570]
- Korea Institute of Ceramic Engineering and Technology (KICET) internal program [KPP20003]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20172420108680] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study successfully synthesized LaNi0.5Co0.5O3 yolk-shell microspheres and demonstrated their high capacity and long cycle stability in lithium-oxygen batteries.
The use of a rationally designed catalyst material is essential for the improvement of electrode reactions in lithium-oxygen (Li-O-2) batteries. In this study, we propose a synthesis strategy of multi-shelled LaNi0.5Co0.5O3 yolk-shell microspheres (Y-LNCO) via one-step spray pyrolysis. The outer shells and inner core are produced by repetitive combustion and contraction of carbon-metal salt composite. The internal void between the core and the shell of Y-LNCO microspheres serves plenty of space for Li2O2 discharge product during the discharge process. The Li-O-2 battery fabricated with Y-LNCO exhibits a high capacity of 22,560 mA h g(-1) at a current density of 200 mA g(-1), low overpotential of 0.57 V, and long cycle stability (150 cycles at a current density of 200 mA g(-1) with a limited capacity of 500 mA h g(-1)).
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