【摘要】 应用溶胶法由CH3COOL i.2H2O、Mn(CH3COO)2和已二酸制备含锂、锰的干凝胶,经高温焙烧制得尖晶石锰酸锂L iMn2O4.XRD分析显示,该尖晶石样品的结晶度随焙烧温度而升高,容量同时增加,但如超过800℃,则循环性能变差.延长焙烧时间,容量呈先增后降趋势.优化后的焙烧条件为750℃、20 h.以此制备的L iMn2O4初始放电容量为130 mAh.g-1,经过15次循环后仍达125 mAh.g-1.更多还原

【Abstract】 Spinel LiMn₂O₄ was prepared from CH₃COOLi·2H₂O,Mn(CH₃COO)₂ and adipic acid based on sol-gel process.XRD analysis showed that when the sintering temperature increased,the crystallinity increased,and the capacity also increased.However,its cycleability reached a maximum value at 750 ℃.The sintering duration also influenced on the capacity.The optimized performance was obtained when the sintering was carried out at 750 ℃ for 20 h.Under these conditions,as-prepared spinel LiMn₂O₄ presented the initial discharge capacity of 130 mAh g^-1 and 125 mAh g^-1 at 15^th cycle.更多还原