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首页> 外文会议>IUPAC 10th International conference on novel materials and their synthesis: Book of abstracts >REGULATION OF LOCAL STRUCTURE IN LINI_(0.5)MN_(1.5)O_4 FOR HIGH RATE LITHIUM-ION BATTERY
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REGULATION OF LOCAL STRUCTURE IN LINI_(0.5)MN_(1.5)O_4 FOR HIGH RATE LITHIUM-ION BATTERY

机译：高速锂离子电池LINI_（0.5）MN_（1.5）O_4的局部结构调控

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摘要

Li-Ni-Mn spinels of nonstoichiometric LiNi_(0.5)Mn_(1.5)O_(4-δ) (o-LNMO) and stoichiometric LiNi_(0.5)Mn_(1.5)O_4 (d-LNMO), which are functional cathode materials in high-voltage lithium-ion batteries. Here, partial substitution of Fe for Ni and Mn in the 5 V spinel cathode LiNi_(0.5)Mn_(1.5)O_4 has been investigated by soft and hard X-ray absorption. The surface electronic structure in iron doped d-LNMO has been altered by the extra electrons when substitutions are made. It has been found that cation substitution can effectively modify surface electronic structure, leading to enhanced cycle life of the batteries. Besides, roles of carbon coating in o-LNMO has been considered. An ordered-disordered phase transformation is trigged by the sucrose during coating process. Our finding will provide some insight into understanding the nature of the active materials, which is one of the critical properties affecting the performance of lithium-ion batteries.
机译：非化学计量的LiNi_（0.5）Mn_（1.5）O_（4-δ）（o-LNMO）和化学计量的LiNi_（0.5）Mn_（1.5）O_4（d-LNMO）的Li-Ni-Mn尖晶石高压锂离子电池。在此，已经通过软X射线和硬X射线吸收研究了5 V尖晶石阴极LiNi_（0.5）Mn_（1.5）O_4中Fe的部分替代Ni和Mn。进行取代时，铁掺杂的d-LNMO中的表面电子结构已被多余的电子所改变。已经发现，阳离子取代可以有效地改变表面电子结构，从而提高了电池的循环寿命。此外，已经考虑了碳涂层在o-LNMO中的作用。在包衣过程中，蔗糖触发了有序-无序相变。我们的发现将为理解活性材料的性质提供一些见识，这是影响锂离子电池性能的关键特性之一。

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  • 来源
  • 会议地点 Zhengzhou(CN)
  • 作者

    N. Qiu; K. Yamamoto; T. Hashishin; Z. Tan; J. Zhang; S. Ohara;

  • 作者单位

    Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047 Japan;

    Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047 Japan;

    Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047 Japan;

    Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047 Japan;

    Beijing Synchrotron Radiation Laboratory, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, 100049, P.R. China;

    Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047 Japan;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    LiNi_(0.5)Mn_(1.5)O_4; lithium-ion battery; XAFS;

    机译：LiNi_（0.5）Mn_（1.5）O_4；锂离子电池; XAFS;

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