电源技术2012，Vol.36Issue(8)：1089-1092,4.
Mg掺杂对负极材料Li4Ti5O12性能的影响
Effects of magnesium doping on performance of anode material Li4Ti5O12
摘要
Abstract
Mg-doped spinel Li4Ti5O12 was synthesized by two-step solid-state reaction in an air atmosphere using magnesium acetate as dopant source of Mg2+. The properties of the obtained material were characterized by SEM, XRD and electrochemical tests. The results indicate that Mg doping does not change the spinel structure of the material, the first discharge specific capacity of the doped sample decreases more slightly than the pristine sample at 0.2 C, while the doped one exhibits excellent electrochemical rate capability and cycling stability, the discharge specific capacity is 2.2 times higher than that of the pristine Li4Ti5O,2 at 10 C rate and there is no obvious capacity fade after 10 cycles. The impedance Rα reduces from 130 Ω for the undoped material to 20 Ω for the doped one, which shows the electronic conductivity of the material is improved greatly.关键词
镁掺杂/Li4Ti5O12/负极材料/锂离子电池/倍率性能Key words
magnesium doping/ lithium titanate/ anode material/ lithium-ion battery/ rate performance分类
信息技术与安全科学引用本文复制引用
肖志平,唐仁衡,王英,肖方明..Mg掺杂对负极材料Li4Ti5O12性能的影响[J].电源技术,2012,36(8):1089-1092,4.基金项目
广州市重大科技专项计划项目(2010U1-D00171) （2010U1-D00171）
