| 高分散纳米晶Li_4Ti_5O_(12)电极材料的制备及电化学性能的研究 |
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| 引用本文： | 王瑾,成雪莲,王子港,杨晖. 高分散纳米晶Li_4Ti_5O_(12)电极材料的制备及电化学性能的研究[J]. 无机材料学报, 2010, 25(3): 235-241 |
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| 作者姓名： | 王瑾 成雪莲 王子港 杨晖 |
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| 作者单位： | 南京工业大学 材料科学与工程学院, 南京 210009 |
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| 基金项目： | 国家重点基础研究发展计划(973)项目(2007CB2097050); 国家自然科学基金(20803035); 江苏省自然科学基金(BK200718) |
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| 摘 要： | 以月桂酸为分散剂,采用无水溶胶-凝胶法合成了高分散的Li4Ti5O12纳米晶.采用XRD、SEM、TG-DSC、激光粒度分析仪、交流阻抗以及恒流充放电测试,对材料的形貌、结构和电化学性能进行表征.结果表明,煅烧温度对Li4Ti5O12的结晶度、微观形貌及其电化学性能有显著的影响.800℃下热处理10h后的产物,颗粒尺寸细小均匀,约在120~275nm之间,显示出优异的电化学性能.在0.5和1C倍率下,首次放电比容量分别可达174.7和163.3mAh/g,经过50次放电循环后,放电容量循环性能优异.研究表明该高分散纳米颗粒的合成方法是适合制备高电化学性能的Li4Ti5O12材料的工艺方法.
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| 关 键 词： | Li4Ti5O12 纳米晶 表面活性剂 放电容量 |
| 收稿时间： | 2009-06-25 |
| 修稿时间： | 2009-08-17 |
Synthesis and Electrochemical Properties of Highly Dispersed Li_4Ti_5O_(12) Nano-crystalline as Anode Material for Lithium Secondary Batteries |
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| WANG Jin,CHENG Xue-Lian,WANG Zi-Gang,YANG Hui. Synthesis and Electrochemical Properties of Highly Dispersed Li_4Ti_5O_(12) Nano-crystalline as Anode Material for Lithium Secondary Batteries[J]. Journal of Inorganic Materials, 2010, 25(3): 235-241 |
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| Authors: | WANG Jin CHENG Xue-Lian WANG Zi-Gang YANG Hui |
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| Affiliation: | College of Materials Science and Engineering, Nanjing University of Technology, Nanjing 210009, China |
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| Abstract: | Nano-sized Li4Ti5O12 powder with high dispersivity was prepared by a novel sol-gel route using lauric acid as surfactant.The crystal structure,microstructure and the electrochemical properties of samples were characterized by XRD,FESEM,TG-DSC,laser particle size analysis,A.C.impedance and galvanostatically charge-discharge experiments.The results demonstrated that the crystallization,microstructure and electrochemical properties were influenced significantly by heat-treatment temperature.Li4Ti5O12 powders c... |
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| Keywords: | Li4Ti5O12 nano-crystalline surfactant discharge capacity |
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