| 锂离子电池负极材料球形钛酸锂的合成及性能 |
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| 引用本文： | 梅天庆,贺利敏,鱼光楠,何建平.锂离子电池负极材料球形钛酸锂的合成及性能[J].材料导报,2011,25(8):45-48. |
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| 作者姓名： | 梅天庆 贺利敏 鱼光楠 何建平 |
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| 作者单位： | 南京航空航天大学材料科学与技术学院; |
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| 基金项目： | 国家自然科学基金(50871053) |
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| 摘 要： | 以3.98mol/L的四氯化钛为前驱体溶液,采用内凝胶法制备了具有尖晶石结构的球形钛酸锂(Li4Ti5O12)粉末。通过XRD、SEM及电化学性能测试等分析手段表明,合成的Li4Ti5O12材料均为纳米一次粒子(晶粒)组成的球形二次粒子(颗粒),且具有较大的比表面积。以这种流动性好、粒径分布均匀、结晶度好的球形钛酸锂为正极材料和Li片为负极材料组成的锂离子电池具有平稳的充放电电压平台和优异的循环性能。在1.0~2.5V充放电,其首次放电容量为173.8mAh/g,经30次充放电循环后,其放电比容量仍有170.2mAh/g。
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| 关 键 词： | 锂离子电池 负极材料 钛酸锂 球形 |
Synthesis and Electrochemical Performance of Spherical Li_4Ti_5O_(12) as Anode Material for Lithium Secondary Batteries |
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| MEI Tianqing,HE Limin,YU Guangnan,HE Jianping.Synthesis and Electrochemical Performance of Spherical Li_4Ti_5O_(12) as Anode Material for Lithium Secondary Batteries[J].Materials Review,2011,25(8):45-48. |
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| Authors: | MEI Tianqing HE Limin YU Guangnan HE Jianping |
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| Affiliation: | MEI Tianqing,HE Limin,YU Guangnan,HE Jianping(School of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016) |
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| Abstract: | With a solution of titanium tetrachloride of 3.98mol/L as the precursor solution,spherical Li4Ti5O12 powders were prepared via a novel gelation method.XRD,SEM testing and determination of the electrochemical pro-perties show that the particles are spherical nanocrystals.The products exhibit great specific surface area.The Li4Ti5O12 powders prepared by this method are spherical,narrowly distributed,well crystallized.A lithium-ion battery composed of spherical Li4Ti5O12and Li shows a quite flat operating volt... |
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| Keywords: | lithium secondary battery anode material Li4Ti5O12 spherical |
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