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Synthesis of nano-sized urchin-shaped LiFePO4 for lithium ion batteries

机译：锂离子电池纳米型核素形寿命4的合成

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摘要

In this article, the facile synthesis of sea urchin-shaped LiFePO4 nanoparticles by thermal decomposition of metal-surfactant complexes and application of these nanoparticles as a cathode in lithium ion secondary batteries is demonstrated. The advantages of this work are a facile method to synthesize interesting LiFePO4 nanostructures and its synthetic mechanism. Accordingly, the morphology of LiFePO4 particles could be regulated by the injection of oleylamine, with other surfactants and phosphoric acid. This injection step was critical to tailor the morphology of LiFePO4 particles, converting them from nanosphere shapes to diverse types of urchin-shaped nanoparticles. Electron microscopy analysis showed that the overall dimension of the urchin-shaped LiFePO4 particles varied from 300 nm to 2 mu m. A closer observation revealed that numerous thin nanorods ranging from 5 to 20 nm in diameter were attached to the nanoparticles. The hierarchical nanostructure of these urchin-shaped LiFePO4 particles mitigated the low tap density problem. In addition, the nanorods less than 20 nm attached to the edge of urchin-shaped nanoparticles significantly increased the pathways for electronic transport.
机译：在本文中，通过锂离子二次电池中的金属表面活性剂复合物的热分解，通过热分解的海胆形LiFePO4纳米颗粒的容纳合成作为锂离子二次电池中的阴极。该工作的优点是合成有趣的LiFepo4纳米结构及其合成机制的容易方法。因此，使用其他表面活性剂和磷酸可以通过注射油胺来调节LiFePO4颗粒的形态。该注射步骤对于量身定制LiFepo4颗粒的形态至关重要，将它们从纳米圈形状转化为不同类型的内核形纳米粒子。电子显微镜分析表明，核心叶片颗粒的总尺寸从300nm至2μm变化。更近的观察显示，纳米颗粒连接到直径5至20nm的许多薄纳米棒。这些内链形的LiFepo4颗粒的分层纳米结构减轻了低振态密度问题。另外，纳米棒附着在核心形纳米粒子的边缘附着的纳米棒显着增加了电子运输的途径。

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  • 来源
    《RSC Advances》 |2019年第24期|共8页
  • 作者

    Yang Changjin; Lee Doo Jin; Kim Hyunhong; Kim Kangyong; Joo Jinwhan; Kim Won Bae; Song Yong Bae; Jung Yoon Seok; Park Jongnam;

  • 作者单位

    Ulsan Natl Inst Sci &

    Technol Sch Energy &

    Chem Engn Ulsan 44919 South Korea;

    Pohang Univ Sci &

    Technol Dept Chem Engn Pohang 790784 South Korea;

    Ulsan Natl Inst Sci &

    Technol Sch Energy &

    Chem Engn Ulsan 44919 South Korea;

    Ulsan Natl Inst Sci &

    Technol Sch Energy &

    Chem Engn Ulsan 44919 South Korea;

    Ulsan Natl Inst Sci &

    Technol Sch Energy &

    Chem Engn Ulsan 44919 South Korea;

    Pohang Univ Sci &

    Technol Dept Chem Engn Pohang 790784 South Korea;

    Hanyang Univ Dept Energy Engn Seoul 04763 South Korea;

    Hanyang Univ Dept Energy Engn Seoul 04763 South Korea;

    Ulsan Natl Inst Sci &

    Technol Sch Energy &

    Chem Engn Ulsan 44919 South Korea;

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  • 正文语种 eng
  • 中图分类 化学;
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