Journal
JOURNAL OF POWER SOURCES
Volume 225, Issue -, Pages 34-39Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2012.09.050
Keywords
Core-shell structure; Layered compound; Lithium batteries; Solid-phase synthesis
Funding
- Nature Science Foundation of China [20873094, 21073138]
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We have fabricated a micron-sized LiCoO2/LiCo0.99Ti0.01O2 composite successfully by solid-phase synthesis, its core-shell structure has been proved by SEM and XPS observation. Electrochemical examinations show that comparing with LiCoO2 and LiCo0.99Ti0.01O2, the obtained LiCoO2/LiCo0.99Ti0.01O2 composite presents greatly enhanced cycling stability as well as rate capability. In addition, DSC measurement indicates that LiCoO2/LiCo0.99Ti0.01O2 has a better thermal safety than LiCoO2. It is considered that all the improvement should be explained by the particular core-shell morphology of the LiCoO2/LiCo0.99Ti0.01O2 sample. (C) 2012 Elsevier B.V. All rights reserved.
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