【作者】 郭孝东； 唐艳； 刘恒； 钟本和；

【Author】 Xiao-dong Guo,Yan Tang,Heng Liu,Ben-he Zhong School of Chemical Engineering,SiChuan University,Chengdu Sichuan 610065

【机构】 四川大学化学工程学院；

【摘要】 <正>磷酸亚铁锂正极材料的离子传导率较低,严重影响了其电化学性能。减小材料颗粒粒径可缩短锂离子的传导路径,降低锂离子传导时间,变相提高其传到速率,达到改善电化学性能的效果。取多个磷酸亚铁锂材料样品,分别采用扫描电子显微镜、激光粒度仪等分析了材料的一次粒径和二次粒径。将材料装配成更多还原

【Abstract】 The influences of particle size on lithium iron phosphate were studied.Scanning electron microscope(SEM),laser particle size analyzer were employed to characterize the first particle size and secondary size of lithium iron phosphate samples.The samples were assembled button batteries to test the electrochemical features of lithium iron phosphate samples,such as charge-discharge cycle performance,oxidation-reduction potentials,impedance.At last,it concluded as following:first particle size was significant for discharge capacity, discharge potential and impedance except for tap density;tap density dependent on secondary particle size largely.更多还原