| 锂离子电池SiO/C复合负极材料的制备及性能研究 |
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| 引用本文： | 王静,赵海雷,王春梅,吕鹏鹏,夏青.锂离子电池SiO/C复合负极材料的制备及性能研究[J].实验技术与管理,2012,29(5):69-72. |
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| 作者姓名： | 王静 赵海雷 王春梅 吕鹏鹏 夏青 |
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| 作者单位： | 1. 北京科技大学材料学院,北京,100083
2. 北京科技大学材料学院,北京100083;新能源材料与技术北京市重点实验室,北京100083 |
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| 摘 要： | 以正硅酸乙酯和蔗糖为原料,采用液相法制备了SiO/C复合负极材料。通过XRD、SEM以及恒流充放电测试等方法研究了煅烧温度、溶液pH值对SiO/C材料的相组成、颗粒形貌及电化学性能的影响。结果表明,煅烧温度为800℃、pH=6时制备的SiO/C负极材料具有高的可逆比容量(～500mAh/g)及优良的循环性能。这主要是由于煅烧温度为800℃时材料中无定形碳的碳化程度较高,pH=6时可形成较小的SiO核心颗粒。
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| 关 键 词： | 氧化硅基材料 负极材料 锂离子电池 |
Preparation and characterization of SiO/C composite as anode material for lithium-ion batteries |
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| Wang Jing
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Zhao Hailei
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Wang Chunmei
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Lv Pengpeng
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Xia Qing.Preparation and characterization of SiO/C composite as anode material for lithium-ion batteries[J].Experimental Technology and Management,2012,29(5):69-72. |
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| Authors: | Wang Jing Zhao Hailei Wang Chunmei Lv Pengpeng Xia Qing |
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| Institution: | 1(1.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;2.Beijing Key Laboratory of New Energy Materials and Technology,Beijing 100083,China) |
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| Abstract: | SiO/C composite was prepared via a wet-chemistry route from TEOS and sugar.The effects of the heat-treatment temperature and pH value on the phase composition,the particle morphology and the electrochemical performance of the prepared SiO/C composites were investigated by scanning electron microscopy(SEM),X-ray diffraction(XRD) and constant current charge-discharge tests.The results reveal that the SiO/C composite synthesized at 800 ℃ and pH=6 exhibits high reversible specific capacity(~500 mAh/g) and excellent cycling stability.This may be mainly attributed to the higher carbonation degree of the amorphous carbon coating at 800 ℃ and the smaller SiO core-particles at pH=6. |
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| Keywords: | SiO-based materials anode materials lithium ion battery |
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