The Preparation And The Electrochemical Performance Of Transition Metal Oxide Negative Materials For Lithium Ion Batteries

Lithium ion battery is a new type of device for Energy Storage.Due to its significant advantages as convenient,safety,higher performance,there is a wide range of needs from the portable electronic devices to electric vehicles and many other fields.Under this background, lot of researchers have gone into the researche and development of lithium ion battery.At present,the commercialization of lithium ion battery cathode material such as LFP has been widely recognized by the society, but it also has disadvantages of low tap density,poor conductivity etc..The anode material which widely used at present is graphite graphite anode material, but also has its disadvantages, such as overcharge poor stability, poor specific capacity.To this end,we provide some new materials and modification as iron anode materials and special morphology of CuO. Application of scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), cyclic voltammetry (CV), thermo gravimetric analysis (EG), XPS, EDS and battery testing system is prepared for the test of electrochemical properties and physical properties of materials1.Novel porous spherical CuO xerogels constructed by crystalline nanorods.(100-200 nm in length and 20-40 nm in diameter) are synthesized as anode materials in lithium-ion batteries.Aided with the soft-template of P123,the product possesses abundant mesopores centered at 7.3 nm and high surface area of 63.1 m2 g-1. Benefiting from its tructural features,including porous structure,one-dimensional structure,and oriented growth along(111)plane,the presented sample delivers high reversible capacity (646.7 mAh g-1 at 0.2 C after 150 cycles),excellent cyclic performance (88% capacity retention after 150 cycles),and superior rate capability (510 mAh g-1 at 0.5 C).2.Exploration of high-rate lithium-ion batteries (LIBs) still remains great challenge because the ineffective charge transfer in electrode materials. In this work, the one-dimensional (1D-2D) coupled composites consisted of CoMoO4 nanorods and graphene sheets are developed as high-rate LIBs anode materials. The composites are well characterized by powder X-ray diffraction (XRD), scanning electron microscope (SEM),transmission electron microscope (TEM), and thermogravimetric analysis (TGA). Endowed with the structural advantages, the present sample exhibits.