| 酚醛树脂包覆氧化天然石墨作为锂离子电池负极材料 |
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| 引用本文： | 高文超,黄桃,沈宇栋,余爱水.酚醛树脂包覆氧化天然石墨作为锂离子电池负极材料[J].物理化学学报,2011,27(9):2129-2134. |
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| 作者姓名： | 高文超 黄桃 沈宇栋 余爱水 |
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| 作者单位： | 1. Department of Chemistry, Institute of New Energy, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, P. R. China;
2. Wuxi Dongheng New Energy Material Co., Ltd, Wuxi 214037, Jiangsu Province, P. R. China |
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| 基金项目： | 上海市基础研究重点项目，上海市分子催化和功能材料重点实验室 |
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| 摘 要： | 天然石墨经过浓硫酸氧化处理,酚醛树脂包覆并高温碳化后形成具有核壳结构的碳包覆氧化天然石墨复合材料.采用扫描电子显微镜(SEM),透射电子显微镜(TEM),X射线衍射(XRD),激光显微拉曼光谱(Raman)等检测技术对氧化处理以及酚醛树脂热解碳包覆前后天然石墨材料的结构与形貌进行分析与表征.结果表明,氧化处理与适量的酚醛树脂热解碳包覆有效修复了天然石墨表面的一些缺陷结构,使其表面更为光滑.电化学测试结果显示,经过氧化处理与酚醛树脂热解碳包覆后天然石墨材料电化学性能得到明显提高.酚醛树脂包覆量为9%时,复合材料表现出最好的电化学性能,其首次放电比容量为434.0mAh·g-1,40次循环后,放电比容量保持在361.6mAh·g-1,而未经处理的天然石墨放电比容量仅为332.3mAh·g-1.该改性方法有效提高了天然石墨材料的比容量,对其进一步应用具有重要意义.
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| 关 键 词： | 负极材料 天然石墨 酚醛树脂 氧化 包覆 |
| 收稿时间： | 2011-05-13 |
| 修稿时间： | 2011-07-29 |
Phenolic Resin Coated Natural Graphite Oxide as an Anode Material for Lithium Ion Batteries |
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| GAO Wen-Chao,HUANG Ta,SHEN Yu-Dong,YU Ai-Shui.Phenolic Resin Coated Natural Graphite Oxide as an Anode Material for Lithium Ion Batteries[J].Acta Physico-Chimica Sinica,2011,27(9):2129-2134. |
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| Authors: | GAO Wen-Chao HUANG Ta SHEN Yu-Dong YU Ai-Shui |
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| Institution: | 1. Department of Chemistry, Institute of New Energy, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200438, P. R. China;
2. Wuxi Dongheng New Energy Material Co., Ltd, Wuxi 214037, Jiangsu Province, P. R. China |
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| Abstract: | A core-shell structure of the carbon-coated natural graphite oxide composite was successfully prepared.Natural graphite was initially oxidized using concentrated sulfuric acid and then carbon coated by the carbonization of phenolic resin at high temperature.Scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffraction(XRD),and Raman techniques were used to characterize the morphology and structure of the natural graphite materials before and after oxidation and carbon coating by ... |
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| Keywords: | Anode material Natural graphite Phenolic resin Oxidation Coating |
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