Fabrication And Lithium Storage Performance Of Metal Oxides Composites

As the promising energy storage devices,lithium-ion batteries?LIBs?have been attracting wide attention of the world.Improving the performance of IIB will be the hotspot in the new energy field.However,as a key component of LIB,anode material is one of the most important factors that affect its performance.Research and develop anode material with higher performance have become the urgent need.In this dissertation,the one-dimensional nanostructured anode materials are prepared by electrospinning.Cubic and tetragonal crystal CuFe₂O₄ are prepared through electrospinning method.At a curren density of 100 mA/g,the cubic CuFe₂O₄ and tetragonal crystal CuFe₂O₄ samples have high first discharge capacity up to 1082.5 mAh/g and 1067.5 mAh/g,respectively.The better electrochemiacl performance can be found on these materals.Nano-scale CuO and CuFe₂O₄ hybrid fibers,CuFe₂O₄ fibers,Fe₂O₃ and CuFe₂O₄ hybrid fibers are successfully achieved by electrospinning,and these materials are characterized.Subsequently,their electrochemical performance are investaged when assembled into the battery.Electrostatic spinning route is successfully decelopedo synthesize original fibers,CuFe₂O₄ nanofibers are prepared by calcinning at 600 ? in air,whereafter Cu₃N and Fe₂N hybrid fibers are obtained by nitriding at 500 ?.Besides CuO and Fe₃C hybrid fibers containing carbon are acquired by calcining at 900 ? in argon.After that,characterizing and testing electrochemical performance are finished.Comparing CuFe₂O₄ nanofibers,ZnFe₂O₄ nanofibers,NiFe₂O₄ nanofibers and their nanobelts morphology that have been synthesized by electrospinning,the materials of different morphologies exhibit excellent electrochemical performance according to the different substances.