摘要
采用醇盐水解法和化学沉淀法制备了SnO2与石墨复合材料,用XRD表征了材料的结构.在L iCoO2/1mol.L-1L iPF6-EC+DEC+EMC/SnO2-石墨体系中用恒流充放电和交流阻抗技术研究了材料的电化学性能.XRD图谱中2种方法都表现了较好的峰形,但化学沉淀法峰型相对比较弱.在恒电流充放电测试中,从循环寿命和循环效率的比较来看,醇盐水解法制备的SnO2-石墨是一种具有发展前途的锂离子电池负极材料.
SnO2-graphite composites, prepared by hydralyzation and chemical precipitation, were characterized by XRD. The electrochemical properties were measured by constant current charge-discharge, electrochemical impedance spectroscopy in testing lithium ion battery-LiCoO2/1mol · L^-1 LiPF6 - EC ＋ DEC ＋ EMC/SnO2-graphite. X- Ray diffraction indicates that the samples has good peak values, but for chemical precipitation, the peak value is relatively small. During the charge/discharge cycling tests , the sample prepared by hydralyzation has superior cycling performance, showing that it was a promising cathode material for lithium-ion battery.
出处
《应用科技》
CAS
2007年第2期66-68,共3页
Applied Science and Technology
关键词
醇盐水解法
化学沉淀法
复合材料
锂离子电池
hydralyzation
chemical precipitation
composite material
Lithium ion battery
