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Issue 28, 2011
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Synthesis of nanoarchitectured LiNi0.5Mn0.5O2 spheres for high-performance rechargeable lithium-ion batteries via an in situ conversion route

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Abstract

LiNi0.5Mn0.5O2 nanoarchitectured spheres (NA-LiNi0.5Mn0.5O2) have been synthesized via an in situ conversion route derived from the use of γ-MnO2 hollow nanostructured spheres. The complete conversion of the γ-MnO2 precursor to layered α-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.

Graphical abstract: Synthesis of nanoarchitectured LiNi0.5Mn0.5O2 spheres for high-performance rechargeable lithium-ion batteries via an in situ conversion route

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Article information


Submitted
26 Jan 2011
Accepted
20 Apr 2011
First published
15 Jun 2011

J. Mater. Chem., 2011,21, 10437-10441
Article type
Paper

Synthesis of nanoarchitectured LiNi0.5Mn0.5O2 spheres for high-performance rechargeable lithium-ion batteries via an in situ conversion route

Y. Liu, B. Chen, F. Cao, X. Zhao and J. Yuan, J. Mater. Chem., 2011, 21, 10437 DOI: 10.1039/C1JM10408J

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