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Hierarchical surface atomic structure of a manganese-based spinel cathode for lithium-ion batteries

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Title
Hierarchical surface atomic structure of a manganese-based spinel cathode for lithium-ion batteries
Author(s)
Lee S.; Gabin Yoon; Jeong M.; Lee M.-J.; Kisuk Kang; Cho J.
Publication Date
2015-01
Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.54, no.4, pp.1153 - 1158
Publisher
WILEY-V C H VERLAG GMBH
Abstract
The increasing use of lithium-ion batteries (LIBs) in high-power applications requires improvement of their hightemperature electrochemical performance, including their cyclability and rate capability. Spinel lithium manganese oxide (LiMn2O4) is a promising cathode material because of its high stability and abundance. However, it exhibits poor cycling performance at high temperatures owing to Mn dissolution. Herein we show that when stoichiometric lithium manganese oxide is coated with highly doped spinels, the resulting epitaxial coating has a hierarchical atomic structure consisting of cubic-spinel, tetragonal-spinel, and layered structures, and no interfacial phase is formed. In a practical application of the coating to doped spinel, the material retained 90% of its capacity after 800 cycles at 608C. Thus, the formation of an epitaxial coating with a hierarchical atomic structure could enhance the electrochemical performance of LIB cathode materials while preventing large losses in capacity.
URI
https://pr.ibs.re.kr/handle/8788114/2146
ISSN
1433-7851
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
Files in This Item:
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