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掺钴对富锂磷酸亚铁锂大电流放电性能的影响 被引量：1

Influence of cobalt doping on the discharge performance of lithium iron phosphate at high rate
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摘要 采用固相法制备了具有橄榄石型结构的微米Li1.12Fe0.98Co0.02PO4/C样品.通过充放电循环、循环伏安实验、交流阻抗、XRD衍射、红外光谱、扫描电镜等现代技术研究了制备的样品的电化学性能.研究表明,在2 C倍率电流下,制备的Li1.12FePO4/C和Li1.12Fe0.98Co0.02PO4/C样品第1循环的放电容量分别为64.8和108.9 mAh.g-1,第30循环的放电容量分别为67.3和110.1 mAh.g-1.因此,掺钴的富锂Li1.12Fe0.98Co0.02PO4/C样品具有明显改善的大电流放电性能. A Li1.12Fe0.98Co0.02PO4/C composite with the micrometer size was synthesized by a solid state reaction. The as-prepared composite was characterized by charge-discharge tests, cyclic vohammetry, electrochemical impedance spectroscope, XRD patterns, infrared spectroscopy and scanning electron microscope method. The experimental results show that Li1.12Fe0.98Co0.02PO4/C delivers a capacity of 108.9 mAh ·g^-1 in the 1st cycle and 110.1 mAh ·g^-1 in the 30th cycle at 2 C rate,respectively. Cobalt doping obviously improves the discharge performance of lithium iron phosphate at high rate current.
作者 常美娟 陈梅蓉 韩铭 姜祥祥 施继成 童庆松
机构地区 福建师范大学化学与材料学院
出处 《吉林化工学院学报》 CAS 2012年第1期4-8,共5页 Journal of Jilin Institute of Chemical Technology
基金 科技部科技人员服务企业项目(2009GJC40003) 福建省科技厅重点项目(2010I0005)
关键词 高倍率放电 磷酸亚铁锂 钴掺杂剂 放电 discharge at high rate lithium iron phosphate cobalt doping agent discharge
分类号 O614.711 [理学—无机化学]
  • 相关文献

参考文献12

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共引文献12

同被引文献51

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二级引证文献6

吉林化工学院学报
2012年 第1期

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