用固相法合成了Al掺杂的高电压LiNi0.5Mn1.5-xAlxO4材料,研究了材料晶胞参数、材料可逆比容量、放电电压及循环性能随掺Al量的变化规律。结果表明,随着掺Al量的增加,材料的可逆比容量在逐渐减小;当Al掺杂量为0.06（LiNi0.5Mn1.44Al0.06O4）时,样品具有最佳的循环性能,100周的容量保持率在97%左右。与此同时,使用以Al掺杂量为0.06的样品为正极,石墨为负极组装的全电池显示了良好的循环性能。
Al doped LiNi0.5Mn1.5-xAlxO4 samples were synthesized by a solid-state reaction method.The influence of Al-dopant content on the lattice parameter,reversible capacity,discharge voltage and cycle behavior of LiNi0.5Mn1.5-xAlxO4 samples was studied.The results show that the discharge capacity decreases with the Al content increasing.Among the various compositions investigated,the LiNi0.5Mn1.44Al0.06O4 sample with x=0.06 presents the best cycle behavior with 97% capacity retention over 100 cycles.In addition,the LiNi0.5Mn1.44Al0.06O4 sample also exhibits excellent cyclability when using graphite as anode.
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