叠片工艺制备25Ah磷酸铁锂锂离子电池  

Preparing 25 Ah lithium iron phosphate Li-ion battery by lamination technique

作　　者：李晶[1,2] 赵晓东[1] 赖延清[2] 刘业翔[2] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621010 [2]中南大学冶金科学与工程学院,湖南长沙410083

出　　处：《电池》2011年第2期76-78,共3页Battery Bimonthly

基　　金：国家科技支撑计划资助项目(2007BAE12B01)

摘　　要：用叠片工艺制备了标称容量为25 Ah的磷酸铁锂(LiFePO4)锂离子电池。对电极材料、极片表面形貌和电池的电化学性能进行分析。在正极面密度为2.40 g/dm2,压实密度为2.60 g/cm3时,以0.50C在2.60～3.40 V循环,所制备的单体电芯的最大放电容量为26.56 Ah;正极材料的放电比容量为132.80 mAh/g,循环100次的容量保持率为95.52%。挤压、针刺、过充和短路等测试结果表明:制备的电池具有良好的安全性能。25 Ah lithium iron phosphate（LiFePO4） Li-ion battery was prepared by lamination technique.The electrode material,electrode surface morphology and electrochemical performance of the battery were analyzed.When the cathode surface density was 2.40 g/dm2,compacted density was 2.60 g/cm3,cycled with 0.50 C in 2.60～3.40 V,the largest discharge capacity of the prepared single cell was 26.56 Ah;the specific capacity of cathode material was 132.80 mAh/g,the capacity retention was 95.52% after 100 cycles.The results of extrusion,needle-punching,over discharge and short circuit tests showed that the prepared battery had fine safety performance.

关 键 词：磷酸铁锂(LiFePO4) 制备 比容量 循环性能 安全性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]