Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/25250
Title: High performance of LiNi 0.5Mn 0.5O 2 positive electrode boosted by ordered three-dimensional nanostructures
Authors: Liu, Y
Cao, F
Chen, B
Zhao, X
Suib, SL
Chan, HLW 
Yuan, J 
Keywords: Electrochemical performance
In situ conversion
Lithium nickel manganese oxide
Lithium-ion battery
Positive electrode materials
Three-dimensional nanostructure
Issue Date: 2012
Publisher: Elsevier
Source: Journal of power sources, 2012, v. 206, p. 230-235 How to cite?
Journal: Journal of power sources 
Abstract: Three-dimensional LiNi 0.5Mn 0.5O 2 (3D-LiNi 0.5Mn 0.5O 2) nanostructures are in situ prepared using cryptomelane-type octahedral molecular sieve manganese dioxide (OMS-2) in the form of dendritic nanostructures as templates. The complete conversion of the OMS-2 precursor to layered α-NaFeO 2-type LiNi 0.5Mn 0.5O 2 and the retention of the 3D dendritic nanostructures have been confirmed by XRD, FE-SEM, TEM, and HR-TEM. The as-synthesized nanostructured positive electrode exhibits a significant improvement in rate performance and cycling reversibility due to its unique nanostructures composed of single-crystalline LiNi 0.5Mn 0.5O 2 nanorods. And the influence of the assembly mode of nanosize LiNi 0.5Mn 0.5O 2 positive electrode material to its electrochemical performances has been investigated. The battery based on 3D-LiNi 0.5Mn 0.5O 2 retains a discharge capacity of 151.6 mAh g -1 (93% of the first discharge capacity) after 50 cycles. A specific discharge capacity of 141.8 mAh g -1 was retained at a rate of 3.2 C, which is about 80% of the capacity at a rate of 0.2 C.
URI: http://hdl.handle.net/10397/25250
ISSN: 0378-7753
EISSN: 1873-2755
DOI: 10.1016/j.jpowsour.2012.01.069
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