Surface Modification of Nanocrystalline LiMn2O4 Using Graphene Oxide Flakes

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 electroch...

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Published in:Materials 2021-07, Vol.14 (15), p.4134
Main Authors: Michalska, Monika, Buchberger, Dominika A., Jasiński, Jacek B., Thapa, Arjun K., Jain, Amrita
Format: Article
Language:English
Subjects:
Alternative energy sources
Chemical synthesis
Composite materials
Crystallites
Electrochemical analysis
Electrodes
Electrolytes
Energy industry
Flakes
Graphene
Lithium
Lithium manganese oxides
Lithium-ion batteries
Manganese
Nanocomposites
Phase transitions
Rechargeable batteries
Rietveld method
Room temperature
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creator Michalska, Monika
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description 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.
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subjects Alternative energy sources
Chemical synthesis
Composite materials
Crystallites
Electrochemical analysis
Electrodes
Electrolytes
Energy industry
Flakes
Graphene
Lithium
Lithium manganese oxides
Lithium-ion batteries
Manganese
Nanocomposites
Phase transitions
Rechargeable batteries
Rietveld method
Room temperature
title Surface Modification of Nanocrystalline LiMn2O4 Using Graphene Oxide Flakes
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