摘要
采用3种电极面密度(其中正极面密度分别为11.0 mg/cm2、14.0 mg/cm2和17.0 mg/cm2)组装成以磷酸铁锂(LiFe-PO4)为正极活性材料的锂离子动力电池,考察了常温循环性能。用交流阻抗、XRD和SEM等方法分析了容量衰减的机理,发现3种电池常温循环性能差别的原因,主要是电池可逆锂损失的程度不同。
Li-ion battery using LiFePO4 as cathode active material assembled with different electrode surface density（surface density of positive was 11.0 mg/cm2, 14.0 mg/cm2 and 17.0 mg/cm2, respectively）, the cycle performance at normal temperature were researched. AC impedance, XRD and SEM methods were used to analyze the mechanism of capacity fading. The reasons for the difference of cycle performance at normal temperature were mainly for the different reversible lithium loss of the battery.
出处
《电池》
CAS
CSCD
北大核心
2011年第4期202-205,共4页
Battery Bimonthly
关键词
锂离子电池
电极
面密度
循环性能
容量衰减机理
Li-ion battery
electrode
surface density
cycle performance
capacity fading mechanism
