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Preparation of LiMn2O4 Graphene Hybrid Nanostructure by Combustion Synthesis and Their Electrochemical Properties

1 Department of Nanotechnology, Center for Post Graduate Studies, Bengaluru Region, VIAT, Muddenahalli, Chikkaballapur-562101 Visvesvaraya Technological University (VTU), Karnataka;
2 International Advanced Research Centre for Powdered Metallurgy and New Materials (ARCI), Balapur, Hyderabad-500005, India

Special Issues: Multifunctional Oxide Materials

The LiMn2O4 graphene hybrid cathode material has been synthesized by spray drying combustion process. The spinel structure cubic phase LiMn2O4 graphene hybrid material was prepared by spray drying process at 120 ℃ and subsequent heat treatment at 700 ℃ for 1 hour. The result indicates that the spinel shaped LiMn2O4 particles wrapped with graphene sheets were formed with particle size in the range of 60-70 nm. The charge-discharge measurement indicates that the LiMn2O4 graphene hybrid material shows an improved discharge capacity of 139 mAh/g at 0.1C rate. The pristine LiMn2O4 nano crystals present only about 132 mAh/g discharge capacity. The LiMn2O4 graphene hybrid samples show good cyclic performance with only 13% of capacity fading in 30 cycles when compared to the pristine LiMn2O4 that shows 22% of capacity fading in 30 cycles. The capacity retention of the LiMn2O4 graphene hybrid samples is about 10% higher than the pristine cycle after 30 cycles.
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Keywords Li ion battery; combustion method; LiMn2O4; reduced graphene

Citation: Dinesh Rangappa, Erabhoina Hari Mohan, Varma Siddhartha, Raghavan Gopalan, Tata Narasinga Rao. Preparation of LiMn2O4 Graphene Hybrid Nanostructure by Combustion Synthesis and Their Electrochemical Properties. AIMS Materials Science, 2014, 1(4): 174-183. doi: 10.3934/matersci.2014.4.174


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Copyright Info: 2014, Dinesh Rangappa, et al., licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution Licese (http://creativecommons.org/licenses/by/4.0)

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