Issue 8, 2013
From the journal:

Physical Chemistry Chemical Physics

Hollow 0.3Li2MnO3·0.7LiNi0.5Mn0.5O2 microspheres as a high-performance cathode material for lithium–ion batteries†

Yan Jiang,a   Ze Yang,a   Wei Luo,a   Xianluo Hu*a  and  Yunhui Huang*a  

* Corresponding authors

a State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P.R.China
E-mail: huxl@mail.hust.edu.cn, huangyh@mail.hust.edu.cn
Fax: +86 -27-87558241
Tel: +86 -27-87558241

Abstract

Hollow 0.3Li2MnO3·0.7LiNi0.5Mn0.5O2 microspheres are synthesized on a large scale through a simple in situ template-sacrificial route. Starting from porous MnO2 microspheres, the hollow microspheres assembled with 0.3Li2MnO3·0.7LiNi0.5Mn0.5O2 nanocrystals are formed by a nanoscale Kirkendall effect. The nanocrystal-assembled hollow 0.3Li2MnO3·0.7LiNi0.5Mn0.5O2 microspheres exhibit a highly reversible capacity as high as 295 mAh g−1 over 100 cycles and excellent rate capability (125 mAh g−1 at 1000 mA g−1). Benefitting from a unique hollow and nanocrystalline architecture, the as-formed hollow microspheres show much enhanced high-temperature (55 °C) electrochemical performances, compared with the products obtained by conventional sol–gel/solid-state reaction methods. This work demonstrates that a fabrication strategy based on the present in situ template-sacrificial approach offers a new method for the design of high-performance cathode materials with hollow interiors for Li-ion battery applications.

Graphical abstract: Hollow 0.3Li2MnO3·0.7LiNi0.5Mn0.5O2 microspheres as a high-performance cathode material for lithium–ion batteries

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Article information

DOI
https://doi.org/10.1039/C2CP44394E
Article type
Paper
Submitted
06 Dec 2012
Accepted
21 Dec 2012
First published
03 Jan 2013

Phys. Chem. Chem. Phys., 2013,15, 2954-2960

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Hollow 0.3Li2MnO3·0.7LiNi0.5Mn0.5O2 microspheres as a high-performance cathode material for lithium–ion batteries

Y. Jiang, Z. Yang, W. Luo, X. Hu and Y. Huang, Phys. Chem. Chem. Phys., 2013, 15, 2954 DOI: 10.1039/C2CP44394E

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