【摘要】 为改善Ti₄Ti₅O₁₂的电化学性能,对Li₄Ti₅O₁₂进行Cu²⁺的Li位掺杂改性处理,制备出了Li_4-x Cu_xTi₅O₁₂复合材料,对材料进行了X射线衍射（XRD）、扫描电子显微镜（SEM）、能谱仪（EDS）表征;将材料制成电极并组装成扣式电池,采用蓝电电池测试系统和电化学工作站对材料的电化学性能进行测试。结果表明:对Li₄Ti₅O₁₂进行Cu²⁺的Li位掺杂可影响Li₄Ti₅O₁₂的晶型结构,降低颗粒大小,可明显提高Li₄Ti₅O₁₂的电化学性能。Li_3.8Cu_0.2Ti₅O₁₂在0.2C倍率下的首次放电比容量为173.30mA/g,100次充放电的循环持率为96.64%,表现出了优异的充放电循环性能。更多还原

【Abstract】 In order to improve the electrochemical performance of Li₄Ti₅O₁₂,Li₄Ti₅O₁₂ was modified by Cu²⁺doping in Li position,and Li_4-xCu_xTi₅O₁₂composite was prepared.The materials were characterized by XRD,SEM and EDS.The material was made into electrode and assembled into button cell.The electrochemical performance of the material was tested by blue cell test system and electrochemical workstation.The results shown that doping Li₄Ti₅O₁₂with Cu²⁺in Li position can affect the crystal structure of Li₄Ti₅O₁₂,reduced the particle size,and improved the electrochemical performance of Li₄Ti₅O₁₂.The first discharge specific capacity of Li_3.8Cu_0.2Ti₅O₁₂ at 0.2C was 173.30mA/g,and the cycle holding rate of 100times charge discharge was 96.64%,which shown excellent charge discharge cycle performance.更多还原