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中文摘要：
钛酸锂因循环性能好、安全，是目前较为理想的锂离子电池负极材料。采用溶胶-凝胶二步煅烧法制备Ce掺杂钛酸锂Li4Ti5-xCexO12（x=0，0．1，0．15，0．2），用SEM、XRD等物理表征手段和恒流充放电、交流阻抗等电化学方法表征材料性能，以考察铈掺杂量对材料电化学性能的影响。结果表明：x=0．15的样品粒径较小，在0．1C时比容量为168．0mAh／g，1C时比容量为116．0mAh／g，倍率性能优于未掺杂的样品，1C下循环10次后容量仍保持在112．7mAh／g。
英文摘要：
Ce-doped Li4 Ti5 O12 anode materials were prepared by two-step sol-gel reaction and the Ce-doped samples were characterized by SEM, XRD, charge-discharge process and electro- chemical impedance spectra in order to study the influence of Ce-doping on the material electro- chemical performance. The result shows, the doped sample with x=0. 15 had smaller size of a- bout 100~200 nm. The doped sample with x=0.15 ty of 168. 0 mAh/g at 0.1C and 116.0 mAh/g at 1C. remained at 112.7 mAh/g. shows better rate performance, with capaci- After 10 cycles at 1C, its discharge capacity
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