【摘要】 采用溶胶-凝胶法制备了5V正极材料LiNi0.5Mn1.5O4。将混合盐溶液以不同速度加入草酸溶液中,对制得的LiNi0.5Mn1.5O4材料的结构、形貌和电化学性能会产生显著的影响。结果表明:将盐溶液以0.17mL/s的速度加入到草酸中,预烧温度为450℃,焙烧4h,后900℃焙烧6h制得的样品为粒径均匀的多面体,1C充放电初始容量达到135mAh/g,55次循环后的放电比容量保持率为96.26%。更多还原

【Abstract】 LiNi0.5Mn1.5O4 powders were synthesized by sol-gel method.The salt solution was added into the oxalic acid solution at different feeding speeds.The crystal structures,material morphologies and electrochemical performances of the LiNi0.5Mn1.5O4 cathode materials were examined by XRD and SEM technologies.The results reveal optimized synthesis parameters:the salt solution of a feeding speed of 0.17ml/s and preheated temperature at 450 ℃for 4h.The asmade material delivers a discharge capacity of 135mAh/g at 1Crate with a high capacity retention of 96.26%after 55 cycles.更多还原