摘要
本文利用共沉淀法制备了富锂材料xLi_2MnO_3·(1-x)LiNi_(0.5)Mn_(0.3)Co_(0.2)O_2(0.3≤x≤0.7),并进行了X射线衍射(XRD),扫描电子显微镜(SEM),透射电子显微镜(TEM)和恒电流充放电测试。研究了在一定的反应温度下合成出的材料的电化学性能。结果表明,Li_(1.17)Mn_(0.48)Ni_(0.25)Co_(0.1)O_2在0.1 C下的放电比容量为240.3m Ah·g^(-1),其在1 C倍率下100次循环后的比容量为180.6 m Ah·g^(-1),容量保持率为89.4%.
Li-rich materials xLi2MnO3·（1-x）LiNi0.5Mn0.3Co0.2O2（ 0. 3≤x≤0. 7） were synthesized by using coprecipitation method.The materials were characterized by powder X-ray diffraction,scanning electron microscopy and transmission electron microscopy.The electrochemical performance of samples was studied by galvanostatic charge / discharge experiment.The results show that,Li1.17Mn0.48Ni0.25Co0.1O2 exhibis the highest discharge capacity（ 240. 3 m Ah·g^-1） and the best cycle performance（ its discharge capacity at 1 C rate after 100 thcycle is 180. 6 m Ah·g^-1 and capacity retention is 89. 4%） than the other two materials.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2016年第3期324-330,共7页
Chemical Research and Application
关键词
锂离子电池
富锂正极材料
共沉淀法
lithium ion battery
Li-rich cathode materials
coprecipitation method
