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Metal organic frameworks derived porous lithium iron phosphate with continuous nitrogen-doped carbon networks for lithium ion batteries

机译:金属有机骨架衍生的具有连续氮掺杂碳网络的多孔磷酸锂铁,用于锂离子电池

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摘要

Lithium iron phosphate (LiFePO4) nanoparticles embedded in the continuous interconnected nitrogen doped carbon networks (LFP/N-CNWs) is an optimal architecture to fast electron and Li+ conduction. This paper, for the first time, reports a reasonable design and successful preparation of porous hierarchical LFP/N-CNWs composites using unique Fe-based metal organic framework (MIL-100(Fe)) as both template and starting material of Fe and C. Such nitrogen-doped carbon networks (N-CNWs) surrounding the lithium iron phosphate nanoparticles facilitate the transfer of Li+ and electrons throughout the electrodes, which significantly decreases the internal resistance for the electrodes and results in the efficient utilization of LiFePO4. The synthesized LFP/N-CNWs composites possess a porous structure with an amazing surface area of 129 m(2) g(-1), considerably enhanced electrical conductivities of 7.58 x 10(-2) S cm(-1) and Li+ diffusion coefficient of 8.82 x 10(-14) cm(-2) s(-1), thereby delivering excellent discharge capacities of 161.5 and 93.6 mAh.g(-1) at 0.1C and 20C, respectively. (C) 2015 Elsevier B.V. All rights reserved.
机译:嵌入连续相互连接的氮掺杂碳网络(LFP / N-CNWs)中的磷酸铁锂(LiFePO4)纳米粒子是实现快速电子和Li +传导的最佳架构。本文首次报告了以独特的铁基金属有机骨架(MIL-100(Fe))为模板,铁和碳的起始原料的多孔分层LFP / N-CNWs复合材料的合理设计和成功制备围绕磷酸铁锂纳米颗粒的此类氮掺杂碳网络(N-CNWs)促进了Li +和电子在整个电极中的转移,这显着降低了电极的内电阻,并导致LiFePO4的有效利用。合成的LFP / N-CNWs复合材料具有令人惊讶的129 m(2)g(-1)表面积的多孔结构,7.58 x 10(-2)S cm(-1)的显着增强的电导率和Li +扩散系数为8.82 x 10(-14)cm(-2)s(-1),因此在0.1C和20C时分别具有161.5和93.6 mAh.g(-1)的出色放电容量。 (C)2015 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Journal of power sources》 |2016年第1期|42-50|共9页
  • 作者单位

    Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China;

    Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China|Carleton Univ, Dept Mech & Aerosp Engn, Ottawa, ON K1S 5B6, Canada;

    Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China;

    Shihezi Univ, Sch Chem & Chem Engn, Key Lab Green Proc Chem Engn Xinjiang Bingtuan, Shihezi 832003, Peoples R China;

    Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China;

    Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China;

    Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lithium iron phosphate; Carbon networks; Template method; Metal organic frameworks;

    机译:磷酸铁锂碳网络模板法金属有机骨架;

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