| 铬元素掺杂对Li4Ti5O（12）电化学性能的影响 |
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| 引用本文： | 刘瑶,陈猛,武洪彬,皮庆力. 铬元素掺杂对Li4Ti5O（12）电化学性能的影响[J]. 电池工业, 2009, 14(5): 322-324 |
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| 作者姓名： | 刘瑶 陈猛 武洪彬 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： | 介绍了采用高温固相法合成掺铬Li4Ti5O12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、SEM、电化学阻抗测试、循环伏安测试及恒电流充放电测试。铬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：铬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Cr∶Ti=1∶10（原子比）的材料性能最好,首次放电比容量可达到175mAh/g,经过50次循环后,放电容量仍保持在166.5mAh/g。
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| 关 键 词： | 锂离子电池 负极材料 Li4Ti5O12 掺杂 |
Effects of Cr-doping on the electrochemical performance of Li_4Ti_5O_(12) |
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| LIU Yao,CHEN Meng,WU Hong-bin,PI Qing-li. Effects of Cr-doping on the electrochemical performance of Li_4Ti_5O_(12)[J]. Chinese Battery Industry, 2009, 14(5): 322-324 |
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| Authors: | LIU Yao CHEN Meng WU Hong-bin PI Qing-li |
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| Affiliation: | LIU Yao,CHEN Meng,WU Hong-bin,PI Qing-li (College of Material Science , Chemical Engineering,Harbin Engineering University,Harbin,Heilongjiang 150001,China) |
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| Abstract: | Chromium-doping lithium titanate(Li4Ti5O12) materials were synthesized by solid-state method at high temperature, and then characterized by XRD, SEM, AC impedance spectroscopy, cyclic voltammetry and galavanostatic cycling tests. The Cr-doping didn't change the crystal structure, but weakened the crystallinity of the material. The results indicated that Cr -doping materials had better electrochemical performance and weaker electrode polarization and no passivating film was found over the electrode. Among th... |
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| Keywords: | Li4Ti5O12 |
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