【摘要】 以无定形TiO2 为原料,反应物无需压制,在1 000 ℃反应8 h制得性能较好的纯尖晶石相Li4Ti5O12, 充放电电流为0 5c时比容量为127 mA·h·g-1,0 1c时比容量达145 mA·h·g-1。正交实验结果表明,固相反应合成条件对Li4Ti5O12循环容量影响从大到小的顺序为:温度,时间,n(Li)/n(Ti)和原料特性;在 800~1 000 ℃之间,原料特性决定最佳反应温度,温度决定反应时间,反应物最佳摩尔比约为0 84。更多还原

【Abstract】 At 1000 ℃, through one step and no pressing pellet for reactants, the pure cubic-spinel phase Li₄Ti₅O₁₂ was prepared with amorphous-TiO₂+Li₂CO₃ for 8 h in air. The specific capacitance is 127 mA·h·g^-1 at 0.5c current, and 145 mA·h·g^-1 at 0.1c current. The sequence of influential factors for Li₄Ti₅O₁₂ preparation is temperature, time, molar ratio of lithium to titanium （n（Li）/n（Ti））, and the characteristics of raw materials. At 8001000 ℃, temperature should be adjusted with the materials, and time with the temperature. The n（Li）/n（Ti） of raw materials is about 0.84.更多还原