| Currently, lithium-ion batteries shows outstanding performance,the volume ratio of the energy, the average working voltage, voltage range, cycle life, self-discharge and other aspects are better than other rechargeable batteries,and are widely used in the communications industry, electronics.Most anode materials of lithium-ion battery in commercial market are carbon materials.Compared to lithium metal, carbon materials have been greatly improved in safety and cycle performance, but there are still many shortcomings which prompting people to continue researching to find substitute for carbon materials.Advantages for TiO2as an anode material of lithium-ion battery:the lithium intercalation potential is higher than carbon, approximately1.75V, which solve the problem of producing dendrite in lithium negative electrode; Small solubility in organic electrolyte; The small volume changes when charge and discharge which can avoid the structural damage and improve the cycle performance.However,due to the poor electron transport of the material,the performance is not so well at high rate.In this paper, we study the mesoporous TiO2microspheres lithium performance, find the factors that affect the of TiO2lithium performance, build better models to improve the performance of TiO2lithium-ion battery. We study the specific surface area on the performance of lithium-ion battery, summed a effective way to improve the performance of the mesoporous TiO2microspheres is to increase the specific surface area, the pore size of the electrolyte transport certain size effect, if the pore size is too small,it will hinder the transport of the electrolyte. Then we introduced a method to produce TiO2material coated with graphene and obtained the3-dimensional network structure of TiO2. We find the graphene throughout the entire mesopores, the high flexibility and stability of the graphene improve the performance of the TiO2material especially in the cycle performance under high rates. |
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