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Author Feng, Xiaoyu ♦ Zhang, Jianxin ♦ Yin, Longwei
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ ALUMINIUM ♦ ALUMINIUM PHOSPHIDES ♦ CATHODES ♦ CRYSTALS ♦ CURRENT DENSITY ♦ ELECTROCHEMISTRY ♦ HEATING ♦ IMPEDANCE ♦ INTERFACES ♦ LITHIUM COMPOUNDS ♦ LITHIUM ION BATTERIES ♦ MANGANATES ♦ SCANNING ELECTRON MICROSCOPY ♦ SURFACE COATING ♦ SURFACES ♦ X-RAY DIFFRACTION ♦ X-RAY SPECTROSCOPY
Abstract Highlights: • Modified LiMn{sub 2}O{sub 4} surface with AlP successfully. • AlP coating surface modification enhances the cycling stability of LiMn{sub 2}O{sub 4} at both room temperature and 60 °C. • AlP coating surface modification improves the rate capability of LiMn{sub 2}O{sub 4}. - Abstract: AlP-modified LiMn{sub 2}O{sub 4} has been synthesized via a simple chemical deposition method followed by high-temperature heating. The X-ray diffraction patterns, SEM images and Energy Dispersive Spectrometer show the successful surface coating of LiMn{sub 2}O{sub 4} by F-43 m crystal form AlP. AlP-modified LiMn{sub 2}O{sub 4} has a high discharge capacity of 125.7 mAh g{sup −1} with retention of 87% at a current density of 1C between 3.3 V and 4.3 V after 100 cycles at 60 °C, while bare LiMn{sub 2}O{sub 4} has more than 28% capacity loss. At 10 rates, the coated sample delivers capacity of 100 mAh g{sup −1}, which is much higher than bare LiMn{sub 2}O{sub 4}. Based on the EIS (electrochemical impedance spectroscopy) result, AlP coating can effectively inhibit the increase of the charge transfer resistance during charging and discharging cycles.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-02-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 74


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