| Abstract Scope |
One-dimensional(1-D)transition metal oxide nanostructures have attracted considerable interest because of their unique physical properties,including optical,magnetic,and electronic characteristics.In this presentation,three1-D transition metal oxide nanostructures will be introduced such asLiMn<sub>2</sub>O<sub>4</sub>,LiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub>,and ZnMn<sub>2</sub>O<sub>4</sub> with tailored morphologies and properties.The higher electrochemical performances of these nanostructures are due to favorable morphology.Ultra-thin spinelLiMn<sub>2</sub>O<sub>4</sub> nanowires were synthesized using facile,easy to scale up two step process,hydrothermal and solid-state reaction.Galvanostatic battery testing showed that material delivers 100-78mAh/g at very high rate(60Cand150C,respectively)in large potential window with very good capacity retention and outstanding structural stability.The high voltageLiNi<sub>0.5</sub>Mn<sub>1.5</sub>O<sub>4</sub>nanorods(150nm in diameter)were also prepared with the same method.The material showed reversible capacity higher than100mAh/g at 4.7V when charged at 1C and discharged at 10C using an electrolyte with improved electrochemical stability(i.e.Li[C<sub>2</sub>F<sub>2</sub>]<sub>3</sub>PF<sub>3</sub> in EC/DMC).One-dimensionalZnMn<sub>2</sub>O<sub>4</sub> nanowire is prepared and investigated for anode material.Formation ofMn<sub>3</sub>O<sub>4</sub> andZnOphases are identified from ex-situTEM studies after initial discharge-charge cycle,which indicates thatZnMn<sub>2</sub>O<sub>4</sub>phase converts to nanocomposite ofMn<sub>3</sub>O<sub>4</sub>andZnOphases immediately after the electrochemical conversion reaction. |