Graphene oxide-assisted synthesis of LiMn2O4 nanopowder

• Autorzy: Majchrzycki Ł , Michalska M. , Walkowiak M. , Wiliński Z. , Lipińska L.
• Języki publikacji: EN

Abstrakty

EN

The article reports sol-gel synthesis of nanosized spinel-type lithium manganese oxide LiMn2O4 (LMO) carried out in the presence of graphene oxide (GO) and its electrochemical lithium insertion ability. The synthesis was performed in an aqueous environment with lithium acetate and manganese acetate used as precursors and citric acid as a chelating agent. The material was characterized by X-ray diffraction, SEM microscopy, Raman spectroscopy and cyclic voltammetry. The calcination step totally eliminated graphene from the final product, nevertheless its presence during the synthesis was found to affect the resulting LiMn2O4 morphology by markedly reducing the size of grains. Moreover, potentials of electrochemical lithium insertion/deinsertion reactions have been shifted, as observed in the cyclic voltammetry measurements. Along with the diminished grain size the voltammetric curves of the graphene oxide-modified material exhibit higher oxidation and lower reduction peak currents. The study demonstrates that GO mediation/assistance during the sol-gel synthesis fosters more nanostructured powder and changes the electrochemical characteristics of the product.

Słowa kluczowe

EN

LiMn2O4 spinel; graphene oxide; sol-gel synthesis; li-ion battery

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2013
• Tom: Vol. 15, nr 3
• Strony: 15--19
• Opis fizyczny: Bibliogr. 24 poz., rys., wykr.

Twórcy

autor

Majchrzycki Ł

• Institute of Non-Ferrous Metals Division in Poznań Central Laboratory of Batteries and Cells, Forteczna 12, 61-362 Poznań, Poland
• Poznań University of Technology, Institute of Physics, Nieszawska 13a, 60-965 Poznań, Poland

autor

Michalska M.

• Institute of Electronic Materials Technology, Wolczyńska 133, 01-919 Warsaw, Poland

autor

Walkowiak M.

• Institute of Non-Ferrous Metals Division in Poznań Central Laboratory of Batteries and Cells, Forteczna 12, 61-362 Poznań, Poland

autor

Wiliński Z.

• Institute of Electronic Materials Technology, Wolczyńska 133, 01-919 Warsaw, Poland

autor

Lipińska L.

• Institute of Electronic Materials Technology, Wolczyńska 133, 01-919 Warsaw, Poland

Bibliografia

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