中文摘要：

由掺钛电解二氧化锰与氧氧化锂及掺杂剂烧结制备掺钛或掺镍-钛或掺钻-钛的尖晶石锂锰氧化物样品。在4．6～2．5V电压范围和1C倍率的电流下充放电时，600℃掺钛佯、600℃和750℃的未掺杂样的初始容量分别为205mAh／g、189mAh／g和207mAh／g；将经过40循环测试并以充电态存放3个月的600℃掺钛样、600℃和750℃未掺杂样再次充放电时，初始放电容量分别为175mAh/g、135mAh／g和126mAh／g，在40循环中平均1次循环的容量衰减率分别为0．4％、1．1％和1．3％。循环伏安实验表明。掺钛明显改善充放电反应的可逆性。拉曼分析表明．掺钛对充电态样品的Mn-O键有明显的增强作用。XRD（X射线衍射）分析表明，600℃掺钛样具有立方晶格，晶轴a为0．8242nm。因此，掺钛可以明显改善样品的放电性能和充电态存放性能。

英文摘要：

A series of Ti-, Ti-Ni-, and Ti-Co-doped spinels were synthesized by sintering the mixture Ti-doped electrolytic manganese dioxides, LiOH·H2O and dopant. In the voltage region of 4.6 to 2.5 V and 1C current, the charge-discharge experiment shows that Ti-doped spinels sintered at 600℃, spinels without doping sintered at 600 ℃ and 750 ℃, exhibit a initial capacity of 205, 189 and 207 mAh/g, spectively. And also exhibit a initial capacity of 175, 135 and 126 mAh/g aider cycled and stored for 3 months at charged state and the average capacity attenuation ratio in each cycle of 40-cycle was 0.4 %,1.1%, 1.3 %, respectively. Cyclic voltammetry experiment shows the titanium dopant obviously improves the reversibility of charge-discharge reaction. Raman analyses show that the Ti dopant enhances Mn-O bond at charged state over the samples without cycling or without doping. XRD data exposure that the Ti doped spinel sintered at 600℃ possesses a cubic structure and its a axis is 0.824 2 nm. Therefore,Ti dopant can improve the reversibility of charge-discharge reaction and storage performance.