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中文摘要：
为了提高锂离子二次电池负极材料Li4Ti5O12的能量密度,本研究以Li OH·H2O、Ti O2、NH4VO3为原料,采用水热法合成了一系列Li4Ti5-xVxO12（0≤x≤0.20）材料。对所合成的材料进行的分析测试表明,800℃是合成Li4Ti5-xVxO12（0≤x≤0.20）最适宜的热反应温度。实验结果还表明,钒掺入Li4Ti5O12后,材料仍然保持了尖晶石型结构;同时材料的循环稳定性依然优越,且大倍率充放电特性得到显著改善。因此,与Li4Ti5O12材料相比,钒掺杂的Li4Ti5-xVxO12材料具有更佳的倍率性能和更高的能量密度,更适用于动力锂离子电池。
英文摘要：
With the attempt to raise the energy density of Li4Ti5O12, a prospective anode material for LIB, a series of vanadium-doping materials Li4Ti5-xVxO12（0≤x≤0.20） were synthesized by a hydrothermal method. LiOH·H2O, TiO2, and NH4VO3 were used as raw materials, which were mixed in different ratios and processed at several temperatures respectively. Results of analysis indicate that 800 ℃ is the most appropriate pyroreaction temperature. XRD shows that the V-doping materials keep pure spinel structure as Li4Ti5O12. According to the data obtained from electrochemical test, the cycling performance of the as-prepared materials Li4Ti5-xVxO12（0≤x≤0.20） is still superior and their rate capability is improved. In conclusion, it is found that conlpared with Li4Ti5O12, the vanadiun3-doping materials Li4Ti5-xVxO12 as-prepared in this study can substantially enhance the density and rate capability oflithiunl-ion batteries.
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