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Homogeneous precipitation synthesis and electrochemical performance of LiFePO4/CNTs/C composites as advanced cathode materials for lithium ion batteries

机译:LiFePO4 / CNTS / C复合材料的均匀降水合成和电化学性能作为锂离子电池的先进阴极材料

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摘要

In this study, a series of LiFePO4/CNTs/C composite cathode materials for Li-ion batteries were synthesized by a simple homogeneous precipitation and subsequent annealing process. The investigation of the influence of CNTs on the structural and electrochemical characteristics of the LiFePO4/CNTs/C composites shows that the resulting composite materials exhibit smaller particle size, lower electron-transfer resistance, and faster lithium ion migration, which contribute to improve lithium ion transfer due to the incorporated CNTs. At 1C, the LiFePO4/CNTs/C composite delivers a stable specific capacity of similar to 126 mA h g(-1) after 500 cycles. At high rates (e.g. 10C), the CNT-incorporated composite is still able to deliver stable capacities of up to similar to 119 mA h g(-1), which is similar to 42% greater than its pristine counterpart.
机译:在该研究中,通过简单的均匀沉淀和随后的退火工艺合成了一系列用于锂离子电池的Li-离子电池的LiFePO4 / CNTS / C复合阴极材料。 CNT对LiFePO4 / CNTS / C复合材料结构和电化学特性的影响表明,所得的复合材料表现出较小的粒度,较低的电子转移性和更快的锂离子迁移,这有助于改善锂离子 由于已掺入的CNT而转移。 在1C下,在500次循环后,LiFePO4 / CNTS / C复合材料可提供类似于126 mA H G(-1)的稳定比容量。 在高速率(例如10℃)中,CNT掺入的复合材料仍然能够提供高达相似的稳定能力,其与119mA H(-1)相似,其与其原始对应物相似的42%。

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  • 来源
    《RSC Advances》 |2015年第130期|共6页
  • 作者单位

    Nanchang Univ Dept Chem Nanchang 330031 Jiangxi Peoples R China;

    Nanchang Univ Dept Chem Nanchang 330031 Jiangxi Peoples R China;

    Nanchang Univ Dept Chem Nanchang 330031 Jiangxi Peoples R China;

    Harbin Inst Technol Sch Civil Engn Harbin 150090 Heilongjiang Peoples R China;

    Nanchang Univ Dept Chem Nanchang 330031 Jiangxi Peoples R China;

    Nanchang Univ Dept Chem Nanchang 330031 Jiangxi 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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