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Novel synthesis of Mn-3(PO4)(2)center dot 3H(2)O nanoplate as a precursor to fabricate high performance LiMnPO4/C composite for lithium-ion batteries

机译:Mn-3(PO4)(2)中心点3H(2)O纳米板作为锂离子电池制备高性能LiMnPO4 / C复合材料的前体的新型合成

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摘要

Mn-3(PO4)(2)center dot 3H(2)O precursor was synthesized by a novel precipitation process using ethanol as initiator, and was lithiated to LiMnPO4/C composite via a combination of wet ball-milling and heat treatment. The as-synthesized precursor was plate-shaped with nanosize thickness. After heat treatment of the ball-milled mixture of Mn-3(PO4)(2)center dot 3H(2)O, NH4H2PO4, Li2CO3 and glucose, the well crystallized and highly pure LiMnPO4 with the particle size of about 100 nm and the carbon coating layer of 2 nm was obtained. The LiMnPO4/C composite fabricated at 650 degrees C delivers discharge capacities of 141.7 mA h g(-1) at 0.05C, 119.9 mA h g(-1) at 1C and 88.7 mA h g(-1) at 5C. Meanwhile, it can retain 95.2% of the initial capacity after 100 cycles at 0.5C, revealing a quite good cycling stability. The method described in this work could be helpful in the development of LiMnPO4/C cathode materials for advanced lithium-ion batteries.
机译:通过使用乙醇作为引发剂的新型沉淀方法合成Mn-3(Po4)(2)中心3H(2)O前体,并通过湿球磨和热处理的组合与LiMnPo4 / C复合材料相锂化。 合成的前体是具有纳米型厚度的板状。 在热处理Mn-3(PO4)(2)中心点3h(2)O,NH 4 H 2 O 4,Li 2 CO 3和葡萄糖的较好结晶和高度纯净的LiMnPO4之后,粒径为约100nm和 获得2nm的碳涂层。 在650摄氏度下制造的LiMnPO4 / C复合材料在5℃下以0.05℃,119.9mA H(-1)在0.05℃,119.9mA H(-1)下的放电容量在5℃下提供1℃和88.7mA H(-1)。 同时,在0.5℃下100次循环后,它可以保留95.2%的初始容量,显示出相当良好的循环稳定性。 该工作中描述的方法可以有助于开发用于高级锂离子电池的Limnpo4 / C阴极材料。

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  • 来源
    《RSC Advances》 |2015年第115期|共8页
  • 作者单位

    Cent S Univ Sch Met &

    Environm Changsha 410083 Hunan Peoples R China;

    Cent S Univ Sch Met &

    Environm Changsha 410083 Hunan Peoples R China;

    Cent S Univ Sch Met &

    Environm Changsha 410083 Hunan Peoples R China;

    Cent S Univ Sch Met &

    Environm Changsha 410083 Hunan Peoples R China;

    Cent S Univ Sch Met &

    Environm Changsha 410083 Hunan Peoples R China;

    Cent S Univ Sch Met &

    Environm Changsha 410083 Hunan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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