| 高振实密度圆饼状LiFePO4/C的制备及电化学性能 |
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| 引用本文： | 吴仪娜,周乐,徐国庆,黄洁,方雄,王涛,刘文明,晋媛,汪洋,唐新村. 高振实密度圆饼状LiFePO4/C的制备及电化学性能[J]. 无机化学学报, 2013, 29(18) |
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| 作者姓名： | 吴仪娜 周乐 徐国庆 黄洁 方雄 王涛 刘文明 晋媛 汪洋 唐新村 |
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| 作者单位： | 中南大学化学化工学院, 长沙 410083,中南大学化学化工学院, 长沙 410083,中南大学化学化工学院, 长沙 410083,中南大学化学化工学院, 长沙 410083,中南大学化学化工学院, 长沙 410083,中南大学化学化工学院, 长沙 410083,中南大学化学化工学院, 长沙 410083,中南大学化学化工学院, 长沙 410083,中南大学化学化工学院, 长沙 410083,中南大学化学化工学院, 长沙 410083 |
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| 基金项目： | 国家自然科学基金(No.21476268,21276286)、新疆镍钴资源与CoxNiyMn1-x-yO2三元(No.738010043)资助项目 |
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| 摘 要： | 以乙二醇为溶剂，采用溶剂热法一步合成圆饼状LiFePO4，然后以葡萄糖为碳源与合成的LiFePO4前躯体高温烧结得到碳包覆的LiFePO4/C复合材料,其振实密度高达1.3 g·cm-3。采用X射线衍射(XRD)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)对LiFePO4/C复合材料进行了物相和形貌表征，研究结果表明制备得到的LiFePO4呈圆饼状，且生成的圆饼是由单晶LiFePO4纳米片堆积而成。此外,LiFePO4颗粒表面碳层包覆均匀。将制备的LiFePO4/C用作锂离子电池正极材料，电化学性能测试表明其具有高的充放电比容量(在0.1C时放电，其初始放电比容量为157.7 mAh·g-1)与良好的循环性能(500次循环后容量保持率为82.4%)。
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| 关 键 词： | 磷酸铁锂 溶剂热法 圆饼状 电化学性能 |
| 收稿时间： | 2017-03-06 |
| 修稿时间： | 2017-04-19 |
Synthesis and Electrochemical Properties of Cake-like LiFePO4/C with High Tap Density |
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| WU Yi-N,ZHOU Le,XU Guo-Qing,HUANG Jie,FANG Xiong,WANG Tao,LIU Wen-Ming,JIN Yuan,WANG Yang and TANG Xin-Cun. Synthesis and Electrochemical Properties of Cake-like LiFePO4/C with High Tap Density[J]. Chinese Journal of Inorganic Chemistry, 2013, 29(18) |
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| Authors: | WU Yi-N ZHOU Le XU Guo-Qing HUANG Jie FANG Xiong WANG Tao LIU Wen-Ming JIN Yuan WANG Yang TANG Xin-Cun |
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| Affiliation: | School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China,School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China,School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China,School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China,School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China,School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China,School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China,School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China,School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China and School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China |
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| Abstract: | The cake-like LiFePO4 is synthesized through a solvothermal method with ethylene glycol as the solvent.After that,the LiFePO4 precursor and glucose are mixed and calcined in an reduced atmosphere to obtain the LiFePO4/C composite with a high tap density of 1.3 g·cm-3.The LiFePO4/C samples were characterized by X-ray diffraction,scanning and transmission electron microscopies,whose results demonstrate that the cake-like LiFePO4/C consists of single-crystalline LiFePO4 nanoplates.Additionally,an amorphous carbon layer is evenly coated on LiFePO4.The electrochemical properties of the cathode material LiFePO4/C indicate that it possess a high charge/discharge specific capacity (the initial discharge capacity reach to 157.7 mAh·g-1 at 0.1C) and good cycle stability (82.4% of capacity retention at 1C after 500 cycles). |
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| Keywords: | LiFePO4 solvothermal method cake-like electrochemical performance |
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