Hydrothermal Synthesis of Li2MnSiO4 Powders as a Cathode Material for Lithium Ion Cells
Li2MnSiO4 cathode materials were prepared by hydrothermal reaction at 150℃ using LiOH,Si(OC2H5)4 and Mn(Ac)2(.)4H2O as raw materials followed by a low temperature heat annealing at 650℃.The samples were characterized by XRD,SEM and FTIR.The powders electrochemical performance was investigated in terms of cycling behavior.Nanometer-sized flake crystalline particles of Li2MnSiO4 are obtained with some degree of agglomeration and little impure phases are detected after annealing.The charge capacity of the Li2MnSiO4 samples is 306 mAh/g (about 1.84 Li+ per unit formula extracted),and the discharge capacity is 114 mAh/g (about 0.68 Li+ per unit formula inserted) in the first cycle in the voltage range of 1.5 ~ 4.8 V under a rate of C/20.With increasing cycle number,the cell exhibits a well cycle performance with more than 95% coulombic efficiency and the maintenance of 61% of its discharge capacity after 50 cycles.
Cathode material Li2MnSiO4 hydrothermal synthesis
Shaohua Luo Ming Wang Xu Zhu Guihong Geng
Department of Materials Science and Engineering,Northeastern University at Qinhuangdao Branch,Qinhua Department of Materials Science and Engineering,Northeastern University at Qinhuangdao Branch,Qinhua Northeast University,Shenyang,Liaoning,110004,P.R.China School of Materials Science and Engineering,Beifang University of Nationalities,Yinchuan 750021,P.R.
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
1588-1591
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）