摘要
通过固相法制备了掺杂Pr的锂离子电池正极材料Li[Ni0.5Co0.2Mn0.3](1-x)PrxO2(x=0、0.01、0.02、0.03和0.05)。用XRD、SEM、充放电测试、循环伏安测试等研究Pr掺杂对材料结构及电化学性能的影响。适量的掺杂不会改变材料的晶体类型,还能减轻阳离子混排,稳定层状结构。在0.1 C(20 m A/g)下,x=0.02样品的首次放电比容量为186.9 m Ah/g,在5.0 C下循环100次后,容量保持率高达94.9%。
Cathode materials Li [LiNi0.5 Co0.2Mn0.3]（1-x） PrxO2 （ x = 0,0.01,0.02,0.03 and 0.05 ） were synthesized by solid reaction. The structure and electrochemical performance were studied by XRD, SEM,charge-discharge and cyclic voltammetry tests. Pr substituting made the layered structure of materials more regular and less cation-ion mixing according with better electrochemical performance. The sample in which x =0. 02 had a discharge capacity of 186. 9 mAh/g at 0. 1 C（20 mA/g）. 94. 9% of capacity was retained after 100 cycles at 5.0 C.
出处
《电池》
CAS
CSCD
北大核心
2014年第6期335-337,共3页
Battery Bimonthly
