| 锡掺杂对尖晶石型Li4Ti5O12性能的影响 |
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| 引用本文： | 武洪彬,陈猛,康亮,周锴,王文刚,张晶.锡掺杂对尖晶石型Li4Ti5O12性能的影响[J].电池工业,2010,15(5):304-307. |
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| 作者姓名： | 武洪彬 陈猛 康亮 周锴 王文刚 张晶 |
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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;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;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;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;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;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： | 采用传统高温固相法合成了锂离子电池负极材料尖晶石型Li4Ti5O12,研究了Sn元素掺杂对Li4Ti5O12的影响。采用XRD、SEM、循环伏安、电化学阻抗图谱、恒流充放电测试研究了材料的晶体结构和电化学性能。结果表明:所制备的材料均具有良好的尖晶石型结构,Sn元素的掺杂有效地改善Li4Ti5O12电子导电性和循环性能,其中以ST2(nSn:nTi=1:9)为最佳,以0.5 C的倍率循环充放电,首次放电比容量可达到138.69mAh/g,50次循环后放电比容量仍保持在124.30mAh/g,容量保持率为89.62%。
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| 关 键 词： | 锂离子电池 负极材料 高温固相 Li4Ti5O12 |
Effect of tin doping on the performance of Li4Ti5O12 |
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| WU Hong-bin,CHEN Meng,KANG Liang,ZHOU Kai,WANG Wen-gang,ZHANG Jing.Effect of tin doping on the performance of Li4Ti5O12[J].Chinese Battery Industry,2010,15(5):304-307. |
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| Authors: | WU Hong-bin CHEN Meng KANG Liang ZHOU Kai WANG Wen-gang ZHANG Jing |
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| Affiliation: | (College of Material Science and Chemical Engineering,Harbin Engineering University,Harbin,Heilongjiang 150001,China) |
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| Abstract: | The cathode materials spinel Li4Ti5O12 for Li-ion battery were synthesized by high temperature solid-state method and the effects of tin doping on it.The crystal structuire and electrochemical performance of the materials were studied by XRD,SEM,cyclic voltammetry,electrochemical impedance spectroscopy and galvanostatic charge-discharge tests.The results showed that the prepared materials had perfect spinel structure,amang them,the material ST2（nSn：nTi=1：9）exhibited the best electrochemical performance,and then the battery was cycled at 0.5 C,the first discharge specific capacity was 138.69 mAh/g,After 50 cycles,the discharge specific capacity was 124.30 mAh/g and the capacity retention was above 89.62%. |
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| Keywords: | Li4Ti5O12 |
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