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Synthesis and Characterization of Silica-LiMn2O4 Core-Shell Nanosphere Cathodes

Published online by Cambridge University Press:  06 September 2013

Jong-Moon Lee ,
Soon-Kie Hong ,
Won Il Cho ,
In-Hyeong Yeo  and
Sun-il Mho
Jong-Moon Lee
Affiliation:
Division of Energy Systems Research, Ajou University, Suwon 443-749, Korea
Soon-Kie Hong
Affiliation:
Division of Energy Systems Research, Ajou University, Suwon 443-749, Korea
Won Il Cho
Affiliation:
Center for Energy Convergence, Korea Institute of Science and Technology, Seoul 136-791, Korea
In-Hyeong Yeo
Affiliation:
Department of Chemistry, Dongguk University, Seoul 100-715, Korea
Sun-il Mho
Affiliation:
Division of Energy Systems Research, Ajou University, Suwon 443-749, Korea
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Abstract

In order to improve the charge/discharge cycling performance of the LiMn2O4 cathode, the spinel LiMn2O4 is coated on the structurally stable SiO2 nanosphere cores, LiMn2O4@SiO2. The core-shell LiMn2O4@SiO2 nanosphere cathodes are prepared by the MnCO3 precipitation on the silica surface and the following solid state reaction of MnCO3@SiO2 with a lithium salt. The charge/discharge cycle stability has improved by the nanostructural characteristics of the LiMn2O4@ shell on the SiO2 core. The cathode composed of LiMn2O4@SiO2 nanospheres exhibits higher capacity retention of 97% than that of LiMn2O4 nanoparticles of 89%, after 100 battery cycles at a 10C rate.

Keywords

core/shellhydrothermalnanostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1540: Symposium E – Materials and Integration Challenges for Energy Generation and Storage in Mobile Electronic Devices , 2013 , mrss13-1540-e03-12
Copyright
Copyright © Materials Research Society 2013 

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