NDLI: Synthesis of layered–layered 0.5Li2MnO3·0.5LiCoO2 nanocomposite electrode materials by the mechanochemical process and first principles study

Content Provider	Royal Society of Chemistry (RSC)
Author	Kim, Chunjoong Kim, Soo Noh, Jae-Kyo Chung, Kyung Yoon Jhon, Myung S. Jhon, Young-In Vemuri, Sesha Hari Smith, Robert Cho, Byung-Won
Copyright Year	2012
Abstract	Li2MnO3-stabilized LiCoO2 electrode materials were synthesized using the method of mechanochemical process. Li2MnO3 was prepared and the mechanochemical process was carried out with LiCoO2, which yielded the layered–layered integrated structure nanocomposites. X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and high-resolution transmission electron microscopy studies confirmed the structural integration of 0.5Li2MnO3·0.5LiCoO2 electrode materials. We also performed the high temperature heat treatment, where our 0.5Li2MnO3·0.5LiCoO2 electrode materials showed improvement in the discharge capacity (∼180 mA h g−1) with good cycleability. To obtain a physical insight into the performance of the nanocomposite structure, we carried out first principles calculations to obtain activation energy barriers of Li+ de-/intercalation, which suggested that utilizing both Li2MnO3 and LiCoO2 components can enhance the Li+ diffusion for the layered–layered integrated structure.
Starting Page	25418
Ending Page	25426
Page Count	9
File Format	HTM / HTML PDF
ISSN	09599428
Volume Number	22
Issue Number	48
Journal	Journal of Materials Chemistry
DOI	10.1039/c2jm35654f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Electrode X-ray crystallography X-ray photoelectron spectroscopy Photoemission spectroscopy Scanning electron microscope High-resolution transmission electron microscopy Rolfing Nanocomposite Activation energy Diffusion
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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