Issue 3, 2011

Spherical core-shell Li[(Li0.05Mn0.95)0.8(Ni0.25Mn0.75)0.2]2O4 spinels as high performance cathodes for lithium batteries

Abstract

Spinel-type, lithium manganese oxides, e.g.LiMn2O4, are very appealing electrodes for upgrading lithium batteries in terms of cost and environmental compatibility. Unfortunately, the practical use of these oxides has so far been hindered by some drawbacks, the most serious being the short life associated with the severe capacity fading on cycling, especially experienced at temperatures above ambient. In this work we report a new strategy for tackling this issue. The results reported here demonstrate that our approach, based on innovative core-shell electrode morphology, is very effective in improving the behaviour of lithium manganese spinel electrodes in lithium cells, by ensuring exceptional capacity stability upon cycling in temperature ranges where all the previous manganese based electrode materials inevitably failed. We show that our core-shell electrodes deliver a specific capacity of the order of 85 mAh g−1 in range of 3–4.3 V vs.Li/Li+ with a retention of 97% over 100 cycles at 60 °C . To our knowledge, such high performance levels have not been met so far.

Graphical abstract: Spherical core-shell Li[(Li0.05Mn0.95)0.8(Ni0.25Mn0.75)0.2]2O4 spinels as high performance cathodes for lithium batteries

Article information

Article type
Paper
Submitted
22 Jul 2010
Accepted
17 Nov 2010
First published
26 Jan 2011

Energy Environ. Sci., 2011,4, 935-939

Spherical core-shell Li[(Li0.05Mn0.95)0.8(Ni0.25Mn0.75)0.2]2O4 spinels as high performance cathodes for lithium batteries

S. Myung, K. Lee, D. Kim, B. Scrosati and Y. Sun, Energy Environ. Sci., 2011, 4, 935 DOI: 10.1039/C0EE00298D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements