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Open Access Novel multilayer sandwich-like LiV3O8 nanosheets-graphene composites with hierarchical structure and enhanced oxygen electro-reduction performance

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In this work, multilayer sandwich-like LiV3O8 nanosheets-graphene (LiV3O8-G) composites were initially developed by a facile solution-based assembly followed by a thermal reduction process using graphene oxide sheets, V2O5 nanobelts and LiOH (aq) as raw materials. The resultant nanocomposites were further determined to be of a unique hierarchical morphology composed of high purity LiV3O8 nanosheets and graphene sheets layerby-layer alternatively. Moreover, the oxygen reduction reaction (ORR) electrocatalytic performance of LiV3O8-G nanocomposites was measured by various electrochemical methods in 0.1 M KOH electrolyte. It is found that LiV3O8-G based electrodes show increased activity and stability in comparison with the bare LiV3O8 electrode. Combined with the analysis of electrochemical impedance spectroscopy (EIS) results, the enhancement can be ascribed to the enlarged conductivity and plentiful interspace due to the introduction of graphene sheets in the nanocomposites.
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Document Type: Research Article

Publication date: October 1, 2016

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