| Zr掺杂对Li4Ti5O12电化学性能的影响 |
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| 引用本文： | 刘瑶,陈猛,武洪彬,蔡智,皮庆力.Zr掺杂对Li4Ti5O12电化学性能的影响[J].应用科技,2009,36(4):1-3. |
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| 作者姓名： | 刘瑶 陈猛 武洪彬 蔡智 皮庆力 |
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| 作者单位： | 哈尔滨工程大学,材料科学与化学工程学院,黑龙江,哈尔滨,150001 |
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| 摘 要： | 采用高温固相法合成了掺锆锂钛氧复合氧化物作为锂离子电池负极材料，并对材料进行了X射线衍射分析、电化学阻抗测试、循环伏安测试及恒电流充放电测试，锆的掺杂并未改变材料的晶体结构，但降低了材料的规整度，实验结果表明：锆的掺杂在一定程度上改善了锂钛氧化合物的电化学性能，降低了电极极化，在电极表面未形成钝化膜，其中以掺杂比为Li：Ti=1：10（原子比）的材料性能最好，首次放电比容量可达到167，5mAh·g^-1，经过50次循环后，放电容量仍保持在146，9mAh·g^-1，
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| 关 键 词： | 锂离子电池 负极材料 锂钛氧化合物 掺杂 |
Effects of Zr doping on the electrochemical performance of Li4Ti5O12 |
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| LIU Yao,CHEN Meng,WU Hong-bin,CAI Zhi,PI Qing-li.Effects of Zr doping on the electrochemical performance of Li4Ti5O12[J].Applied Science and Technology,2009,36(4):1-3. |
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| Authors: | LIU Yao CHEN Meng WU Hong-bin CAI Zhi PI Qing-li |
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| Institution: | LIU Yao, CHEN Meng, WU Hong-bin, CAI Zhi, PI Qing,li ( College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China) |
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| Abstract: | The Zr-doping lithium titanate materials were synthesized by a solid-state method, and then characterized by X-ray diffraction, AC impedance spectroscopy, cyclic voltammetry and galavanostatic cycling tests. The Zr doping didnt change the crystal structure, but weakened the crystallization of the material. The results indicate that Zr-doping materials have better electrochemical performance and weaker electrode polarization and no passivating film can be found over the electrode, and among which the sample with the Zr： Ti = 1：10 （molar ratio） is the best. It has an initial capacity of 161 mAh·g^-1, and retains 146.9 mAh·g^-1 after 50 cycles. |
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| Keywords: | Li-ion battery negative material lithium titanium oxide doping |
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