Surface Modification of Nanocrystalline LiMn<sub>2</sub>O<sub>4</sub> Using Graphene Oxide Flakes
Monika Michalska,
Dominika A. Buchberger,
Jacek B. Jasiński,
Arjun K. Thapa,
Amrita Jain
Affiliations
Monika Michalska
Department of Chemistry, Faculty of Materials Science and Technology, VŠB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava-Poruba, Czech Republic
Dominika A. Buchberger
Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
Jacek B. Jasiński
Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY 40292, USA
Arjun K. Thapa
Conn Center for Renewable Energy Research, University of Louisville, Louisville, KY 40292, USA
Amrita Jain
Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-106 Warsaw, Poland
In this work, a facile, wet chemical synthesis was utilized to achieve a series of lithium manganese oxide (LiMn2O4, (LMO) with 1–5%wt. graphene oxide (GO) composites. The average crystallite sizes estimated by the Rietveld method of LMO/GO nanocomposites were in the range of 18–27 nm. The electrochemical performance was studied using CR2013 coin-type cell batteries prepared from pristine LMO material and LMO modified with 5%wt. GO. Synthesized materials were tested as positive electrodes for Li-ion batteries in the voltage range between 3.0 and 4.3 V at room temperature. The specific discharge capacity after 100 cycles for LMO and LMO/5%wt. GO were 84 and 83 mAh g−1, respectively. The LMO material modified with 5%wt. of graphene oxide flakes retained more than 91% of its initial specific capacity, as compared with the 86% of pristine LMO material.
