CAJ | 학술논문

采用溶胶-凝胶法制备了5 V正极材料LiNi0．5 Mn1．5 O4。将混合盐溶液以不同速度加入草酸溶液中，对制得的LiNi0．5 Mn1．5 O4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0．17 mL/s的速度加入到草酸中，预烧温度为450℃，焙烧4 h，后900℃焙烧6 h制得的样品为粒径均匀的多面体，1 C 充放电初始容量达到135 mAh/g，55次循环后的放电比容量保持率为96．26％。
채용용효-응효법제비료5 V정겁재료LiNi0．5 Mn1．5 O4。장혼합염용액이불동속도가입초산용액중，대제득적LiNi0．5 Mn1．5 O4재료적결구、형모화전화학성능회산생현저적영향。결과표명：장염용액이0．17 mL/s적속도가입도초산중，예소온도위450℃，배소4 h，후900℃배소6 h제득적양품위립경균균적다면체，1 C 충방전초시용량체도135 mAh/g，55차순배후적방전비용량보지솔위96．26％。
LiNi0.5 Mn1.5 O4 powders were synthesized by sol-gel method.The salt solution was add-ed into the oxalic acid solution at different feeding speeds.The crystal structures,material mor-phologies and electrochemical performances of the LiNi0.5 Mn1.5 O4 cathode materials were exam-ined by XRD and SEM technologies.The results reveal optimized synthesis parameters:the salt solution of a feeding speed of 0.17 ml/s and preheated temperature at 450 ℃ for 4 h.The as-made material delivers a discharge capacity of 1 3 5 mAh/g at 1 C rate with a high capacity reten-tion of 96.26% after 55 cycles.