Preparation And Study Of Anode Materials For Titanium Dioxide Based Lithium Ion Batteries

Energy has always been the standard and guarantee of world economic development.With the continuous development of society,human's demand for energy is naturally intensified.Batteries,one of the most important energy storage devices nowadays,realized the mutual transformation of chemical energy to electrical energy.And energy storage is also an effective solution to the energy crisis.Lithium-ion batteries,with their advantages of high working voltage,high capacity,large circulation and excellent environmental tolerability,have an unshakable position in all kinds of portable electronic devices nowadaysAs an important part of li-ion battery,the anode material has a strong influence on the performance of the battery.Titanium dioxide,due to its good stability,low volume expansion?3-4%?,high operating voltage and low cost,is regarded as the most promising material to replace the graphite base negative electrode.However,the poor ionic conductivity and low conductivity limit its further development.In this paper,titanium dioxide is further modified by composite of highly conductive material to improve its conductivity and ion transmission.The modified titanium dioxide was used as the active material to prepare the electrode of lithium ion battery.?1?shape-controlled anatase Titania with tailored facets was synthesized via the employment of 3-aminopropyl-trimethoxysilane?APTMS?as shape-tunable and capping agent.The as-synthesized anataseTiO2 nanorods was highly crystalline and exposed with{001}and{100}facets without any high temperature annealing treatment.The LIBs based on the highly crystalline TiO₂ nanorods reveals significant improvement in high-rate capacity and cycling performance,which can be explained by the enhance electron transport and Li⁺diffusion resulting from the exposed{001}and{100}facets.?2?We have achieved a controllable morphology transformation of TiO₂ via the introduction of CNTs.The intervention of acid-treated CNTs promotes the formation of TiO2with tunable size from 200 to 500 nm by adjusting the amount of CNTs.Furthermore,the existence of CNTs provides an interconnected conductive network ensuring the homogenous dispersion of TiO₂ and fast diffusion kinetics of both Li⁺ion/electrons.Typically,the TNP@CNT HNs with an optimized diameter?300 nm?exhibited a high specific surface area,uniform particle/pore size,short Li+ion/electrons transport pathway,and high electronic conductivity.Owing to these unique structural features,the LIBs based on this optimized TNP@CNT HNs shows excellent cycling performance and high rate capability.?3?3D Villose TiO₂ Architectures grown on carbon textiles were synthesized by a safety one-pot low-temperature hydrothermal route.Building 3D architectures based on 2D conductive materials can not only ensure excellent conductivity and perfect flexibility,but can also reduce self-aggregation to enhance lithium-ion intercalation/extraction.Additionally,the build blocks of these 3D VTA can be accurately controlled by adjusting the hydrolysis degree of PTO.Moreover,modest hydrolysis reaction can obtain greater electrochemical activity and better electrochemical performances.