Nd^(3+)掺杂对钛酸锂电化学性能的影响  

Effects of Nd^(3+) doping on the electrochemical performance of lithium titanate

作　　者：王浩[1] 唐致远[1] 

机构地区：[1]天津大学化工学院,天津300072

出　　处：《电池》2013年第3期127-129,共3页Battery Bimonthly

摘　　要：采用固相法合成了Li4Ti5-xNdxO12(x=0、0.02、0.05和0.08)。x=0和0.02的样品,XRD图中没有杂质峰;而x=0.05和0.08的样品,因为掺杂量过多,包含杂质相Nd2Ti3O8.7。电化学测试结果表明:Nd3+掺杂可改善高倍率时的循环稳定性,原因是Nd—O键的键能高于Ti—O键;Nd3+掺杂减小了钛酸锂的电荷传递阻抗,使倍率性能得以改善。Li4Ti5 -xNdx O12 （x = 0,0.02,0. 05 and 0. 08 ）was prepared by solid-state method. There was no impurity peak in the XRD patterns of samples in which x =0 and 0. 02 ,since too much doping amount,an impurity phase of Nd2Ti3O8.7 was in the samples in which x = 0. 05 and 0. 08. Electrochemical test results showed that the doping of Nd^3 ＋ could improve the cycle stability at high rate, since the bond energy of Nd--O bond was higher than that of Ti--O bond, Nd^3＋ reduced the charge transfer resistance of lithium titanate,thus the rate performance was improved.

关 键 词：钛酸锂(Li4Ti5O12) 电化学性能 负极材料 掺杂 

分 类 号：TM912.9[电气工程—电力电子与电力传动]