Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/12963
Title: Synthesis of nanoarchitectured LiNi0.5Mn0.5O2 spheres for high-performance rechargeable lithium-ion batteries via an in situ conversion route
Authors: Liu, Y
Chen, B
Cao, F
Zhao, X
Yuan, J 
Issue Date: 2011
Publisher: Royal Society of Chemistry
Source: Journal of materials chemistry, 2011, v. 21, no. 28, p. 10437-10441 How to cite?
Journal: Journal of materials chemistry 
Abstract: LiNi0.5Mn0.5O2 nanoarchitectured spheres (NA-LiNi0.5Mn0.5O2) have been synthesized via an in situ conversion route derived from the use of gamma-MnO2 hollow nanostructured spheres. The complete conversion of the gamma-MnO2 precursor to layered alpha-NaFeO2-type NA-LiNi0.5Mn0.5O2 has been confirmed by XRD, FE-SEM, TEM, and HR-TEM. This NA-LiNi0.5Mn0.5O2 cathode exhibits a remarkable enhancement of rate performance compared with that of LiNi0.5Mn0.5O2 particles prepared by a conventional solid-state reaction method (SS-LiNi0.5Mn0.5O2). The batteries based on NA-LiNi0.5Mn0.5O2 retain a discharge capacity of 153.5 mA h g(-1) (93% of the first discharge capacity) after 75 cycles. A specific discharge capacity of 121.9 mA h g(-1) was retained at a rate of 3.2 C, which is about 70% of the capacity at a rate of 0.2 C.
URI: http://hdl.handle.net/10397/12963
ISSN: 0959-9428
EISSN: 1364-5501
DOI: 10.1039/c1jm10408j
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