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Author Qian, Xinye ♦ Zhao, Di ♦ Jin, Lina ♦ Shen, Xiangqian ♦ Yao, Shanshan ♦ Rao, Dewei ♦ Zhou, Youyuan ♦ Xi, Xiao ming
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ CAPACITY ♦ CURRENT DENSITY ♦ ELECTROCHEMISTRY ♦ LANTHANUM OXIDES ♦ LITHIUM-SULFUR BATTERIES ♦ ORAL CAVITY ♦ OXIDATION ♦ REDOX REACTIONS ♦ SPHERICAL CONFIGURATION ♦ SPRAYS ♦ SULFIDES
Abstract Highlights: • Hollow spherical La{sub 2}O{sub 3} was fabricated by a spray dryer. • Hollow spherical La{sub 2}O{sub 3} was coated on the routine separator and equipped in Li-S battery. • La{sub 2}O{sub 3} coated layer can effectively trap lithium polysulfides and accelerate the electrochemical kinetics of the redox reactions. - Abstract: In order to alleviate the shuttle effects of lithium polysulfides (LiPSs) in Lithium sulfur batteries. Lanthanum oxide (La{sub 2}O{sub 3}) with a hollow spherical structure was synthesized by a spray dryer and coated on the routine separator evenly as the main coating material to trap LiPSs and accelerate the electrochemical kinetics of the redox reactions.CV tests and EIS analysis demonstrate that Li-S battery equipped with this modified separator shows higher discharge potential and faster electrochemical reaction in comparison with the routine separator and super P coated separator samples. Charge/discharge measurements at different current densities show that Li-S cell with the hollow spherical La{sub 2}O{sub 3} coated separator can deliver an initial capacity of 966 mA hg{sup −1} at 1C and maintains a discharge capacity of 720 mA hg{sup −1} after 200 cycles. Besides, it presents a high discharge capacity of 820 mA hg{sup −1} at 2C which demonstrates a promising rate performance.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2017-10-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 94


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