【摘要】 在正交试验的基础上考察了烧结温度及时间、锂源对固相合成Li₄Ti₅O₁₂性能的影响.结果表明,烧结温度为最显著影响因素;恰当的温度与时间组合可以制备粒径小、结晶度好的产物,具有良好的电化学性能;硝酸锂为锂源制备的Li₄Ti₅O₁₂具有较好的高倍率充放电能力.以LiNO₃为锂源,空气气氛下800℃烧结12h,所得Li₄Ti₅O₁₂在大电流密度下充放电性能良好,1C、2C、5C时的放电容量分别达到了151、140、115mAh·g^-1,且具有良好的可逆性.更多还原

【Abstract】 Effects of sintering temperature,time and the lithium salts on the properties of Li₄Ti₅O₁₂ synthesized by a solid-state-method were studied based on orthogonal experiments.The results show that sintering temperature is the most principal factor on the performance of Li₄Ti₅O₁₂.Synthesized at proper sintering temperature with appropriate time,the product will have good electrochemical properties with finer particle size and better crystallinity.The high-rate discharge/charge property of Li₄Ti₅O₁₂ prepared with LiNO₃ is much better.Li₄Ti₅O₁₂ obgained at the optimum condition,namely preparing with LiNO₃ and sintering at 800℃for 12h,performs well when charged and discharged with high current density.It delivers discharge capacities of 151mAh·g^-1,140mAh·g^-1 and 115mAh·g^-1 at the rate of 1C,2C and 5C,respectively,and shows good reversibility.更多还原