| PVA辅助两步碳热还原法合成LiFePO_4/C复合材料 |
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| 引用本文： | 尹艳红,张会双,李向南,马志华,杨书廷. PVA辅助两步碳热还原法合成LiFePO_4/C复合材料[J]. 河南师范大学学报(自然科学版), 2012, 40(2): 86-90 |
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| 作者姓名： | 尹艳红 张会双 李向南 马志华 杨书廷 |
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| 作者单位： | 河南师范大学化学与环境科学学院,河南新乡453007;河南省动力电源及关键材料工程技术研究中心,河南新乡453007 |
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| 基金项目： | 河南省重点科技攻关项目，河南省基础与前沿技术研究计划项目，新乡市科技重大项目 |
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| 摘 要： | 以Fe3+为铁源,葡萄糖和有机物聚乙烯醇PVA共同为碳源两步碳热还原法合成LiFePO4/C材料.采用XRD,SEM,LAND电池测试系统及电化学工作站等对材料的晶体结构、形貌和电化学性能进行了研究,并对PVA不同时间加入对材料性能的影响做了分析.结果表明:PVA在原料预烧之后加入,所得LiFePO4/C复合材料具有丰富的表面结构,有较小的交流阻抗和很好的充放电性能,0.1C下初始放电比容量达到了167mAh.g-1,且不同倍率下循环性能稳定.
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| 关 键 词： | LiFePO4/C 葡萄糖 聚乙烯醇 碳热还原 |
Synthesize of LiFePO4/C Composites Using PVA Assisted Two-step Carbothermal Reduction Method |
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| YIN Yan-hong , ZHANG Hui-shuang , LI Xiang-nan , MA Zhi-hua , YANG Shu-ting. Synthesize of LiFePO4/C Composites Using PVA Assisted Two-step Carbothermal Reduction Method[J]. Journal of Henan Normal University(Natural Science), 2012, 40(2): 86-90 |
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| Authors: | YIN Yan-hong ZHANG Hui-shuang LI Xiang-nan MA Zhi-hua YANG Shu-ting |
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| Affiliation: | 1,2(1.College of Chemistry and Environmental Science,Henan Normal University,Xinxiang 453007,China;2.Engineering Technology Research Center of Motive Power and Key Materials,Xinxiang 453007,China) |
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| Abstract: | With Fe3+ as Ferrum source,glucose and polyvinyl alcohol(PVA) as carbon sources,LiFePO4/C was synthesized by a novel two-step carbothermal reduction method.The crystalline structure,morphology and electrochemical performance of the samples were investigated by X-ray diffraction,SEM,Land testing system and electrochemical workstation.The adding sequence of PVA was investigated.Results show that the synthesized material with PVA added after pre-sintering has rich surface morphology,smaller AC impedance and good electrochemical performances.The initial discharge specific capacity is 167 mAh·g-1 at 0.1 C current density.And the cycling performances at different current rate are stable. |
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| Keywords: | LiFePO4/C glucose polyvinyl alcohol carbothermal reduction |
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