| FePO_4为原料碳热还原法合成LiFePO_4/C工艺的优化 |
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| 引用本文： | 张敬捧,王丽,梁广川,崔军燕,郅晓科. FePO_4为原料碳热还原法合成LiFePO_4/C工艺的优化[J]. 电源技术, 2009, 33(8) |
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| 作者姓名： | 张敬捧 王丽 梁广川 崔军燕 郅晓科 |
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| 作者单位： | 河北工业大学,能源与环保材料研究所,天津,300130 |
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| 摘 要： | 以市售FoPO4·2 H2O为原料,利用正交实验方法优化碳热还原法制备LiFePO4/C复合正极材料的合成工艺,考察合成温度、原料摩尔比及保温时间等因素对材料形貌及电化学性能的影响,得到最佳工艺组合:合成温度650℃,保温时间16 h,原料摩尔比2∶1∶2.5.按最佳工艺合成的样品0.2 C与1 C时的最大放电比容量可达151.4、141.2mAh/g,振实密度可达1.4 g/cm3,且表现出良好的循环稳定性.
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| 关 键 词： | 正交实验 工艺优化 |
Optimal synthesis techniques of LiFePO_4/C composite prepared by carbothermal reduction using FePO_4 as raw material |
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| ZHANG Jing-peng,WANG Li,LIANG Guang-chuan,CUI Jun-yan,ZHI Xiao-ke. Optimal synthesis techniques of LiFePO_4/C composite prepared by carbothermal reduction using FePO_4 as raw material[J]. Chinese Journal of Power Sources, 2009, 33(8) |
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| Authors: | ZHANG Jing-peng WANG Li LIANG Guang-chuan CUI Jun-yan ZHI Xiao-ke |
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| Affiliation: | ZHANG Jing-peng,WANG Li,LIANG Guang-chuan,CUI Jun-yan,ZHI Xiao-ke (Institute of Power Source & Envirorrnental Materials,Box1055,Hebei University of Technology,Tianjin,300130,China) |
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| Abstract: | The orthogonal experiment [L_9(3~3)] was designed to determine the optimal synthesis techniques of LiFePO_4/C composite prepared by one-step solid-state reaction using FePO_4·2 H_2O as raw material. The effects of synthesis temperature, time, and the molar ratio of raw materials on the morphology and electrochemical performance of LiFePO_4/C were systematically investigated to optimize the synthesis techniques. The results showed that the optimal techniques were as follows: synthesis temperature 650 ℃, time 16 h, the molar ratio of raw materials 2 : 1 : 2.5. The as-prepared optimal sample showed maximum discharge capacities of 151.4 and 141.2 mAh/g at 0.2 C & 1 C rate, respectively, with good cycling stability. The top density could reach 1.4 g/cm~3. |
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| Keywords: | LiFePO4 FePO4 |
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