Preparation And Characterization Of Anatase Titania Ferrite Carbon Composites

Lithium ion battery has been widely used in the field of new energy vehicles.The current research focus is to develop a new generation of electrode materials with high capacity,low cost and good safety performance.Among the transition group metal oxides,titanium-based oxides have large reserves,low cost and simple preparation.They show advantages of safety and good cycling stability in the study of electrode materials for lithium ion batteries,and have broad application prospects in high-power lithium ion batteries.Hydrothermal method is an effective method with simple operation,good repeatability and low cost.The research contents and conclusions of this topic include:Hydrothermal characterization of TiO₂ nanoparticles and the influence of reaction conditions.The experimental results showed that the concentration of hydroxide in alkaline environment was negatively correlated with the particle size of TiO₂.It was proposed that the reason for the formation of spherical TiO₂ was dissolution-nucleation-fracture-growth.The electrochemical test results showed that the first discharge capacity of TiO₂ nanosphere at 1C ratio was 140.7 m Ah/g.Preparation and Study of sodium titanate nanocrystal flowers in Tremella Vulgaris.Nano flower of sodium titanate was prepared by hydrothermal method.The results showed that sodium hydroxide inhibited the further hydrolysis of tetramethyl titanate,and sodium titanate was generated.Flake sodium titanate adhered and grew with the tube wall as the core,finally forming a unique tylenoid structure with a capacity of252.5 m Ah/g and a residual capacity of 247.6 m Ah/g after 100 cycles.Preparation and characterization of TiO₂/ Carbon microsphere composites.TiO₂/carbon microsphere composite materials were prepared by hydrothermal method assisted by dodecamine as a surfactant.The experimental results showed that the addition of dodecamine inhibited the agglomeration effect of TiO₂.In the reaction,TiO₂ grew along the surface of the carbon microsphere,and TiO₂ was wrapped on the surface of the carbon microsphere.The charging and discharging test results show that the capacity is628.1 m Ah/g at 1C rate,and the remaining capacity is 311.3 m Ah/g after 100 cycles.Ferrite/titanium dioxide/carbon composite material of hydrothermal preparation,realized the precise control of the element of composite materials,and composite materials in 1 c magnification capacity of 923.3 m Ah/g,a 100-cycle after the residual capacity of 800.5 m Ah/g,basic retain the advantages of the performance of the components,metal oxide enhance the capacity of the composite materials,the addition of carbon materials for composite support structure,formed a uniform distribution of ferrite/titanium dioxide array.The experimental results show that using intercalated-li mechanism of different metal oxide materials can significantly improve the cycle stability of the material,reduce the material in the process of charging and discharging volume change,the addition of carbon material to improve the conductivity of the material,its unique three-dimensional structure can also be in the process of hydrothermal template to the formation of metal oxide crystallization processes,such as optimization of material structure,material has been greatly promoted.In this paper,the preparation of composite materials was studied in depth,and the structure and properties of each component material were studied,providing a clear guidance for the optimization and large-scale and commercial preparation of lithium ion battery anode materials.