| Al掺杂对Li_4Ti_5O_(12)结构及性能的影响 |
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| 引用本文： | 熊训辉,王志兴,伍凌,李新海,吴飞翔,郭华军,彭文杰.Al掺杂对Li_4Ti_5O_(12)结构及性能的影响[J].中国有色金属学报,2011(9). |
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| 作者姓名： | 熊训辉 王志兴 伍凌 李新海 吴飞翔 郭华军 彭文杰 |
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| 作者单位： | 中南大学冶金科学与工程学院; |
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| 基金项目： | 国家重点基础研究发展计划资助项目(2007CB613607) |
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| 摘 要： | 以金红石型TiO2、Li2CO3和Al2O3为原料,采用高温固相法制备锂离子电池负极材料Li4Ti5O12和Li4AlxTi5-xO12(x=0,0.025,0.05,0.1,0.2,0.4)。利用X射线衍射仪、扫描电镜、半电池充放电测试和交流阻抗测试研究材料的物相、结构、形貌以及电化学性能。结果表明:Al掺杂不会改变Li4AlxTi5-xO12的尖晶石结构,但会导致材料颗粒尺寸增大;适当Al掺杂后,材料的循环稳定性和极化性能得到改善,充放电比容量和可逆比容量不同程度降低;Li4Al0.025Ti4.975O12具有最优的电化学性能,0.1C倍率下首次充电比容量达到156.7 mA.h/g。
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| 关 键 词： | 钛酸锂 锂离子电池 负极材料 Al掺杂 |
Effect of Al-doping on structure and eletrochemical performance of Li_4Ti_5O_(12) |
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| XIONG Xun-hui,WANG Zhi-xing,WU Ling,LI Xin-hai,WU Fei-xiang,GUO Hua-jun,PENG Wen-jie.Effect of Al-doping on structure and eletrochemical performance of Li_4Ti_5O_(12)[J].The Chinese Journal of Nonferrous Metals,2011(9). |
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| Authors: | XIONG Xun-hui WANG Zhi-xing WU Ling LI Xin-hai WU Fei-xiang GUO Hua-jun PENG Wen-jie |
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| Affiliation: | XIONG Xun-hui,WANG Zhi-xing,WU Ling,LI Xin-hai,WU Fei-xiang,GUO Hua-jun,PENG Wen-jie (School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China) |
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| Abstract: | Anode materials Li4Ti5O12 and Li4AlxTi5-xO12(x=0,0.025,0.05,0.1,0.2,0.4) were prepared by solid-state reaction using rutile TiO2 and Li2CO3 as the reactants.The crystalline structure,morphology,composition and electrochemical properties of the as-prepared materials were characterized by XRD,SEM and half cell charge-discharge testing and AC impedance.The results show that all of the prepared Li4AlxTi5-xO12 keep the structure of spinel,however,the particle size of samples with Al-doping increases in a certain... |
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| Keywords: | lithium titanate Li-ion battery anode material Al-doping |
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