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Nickel-Rich and Lithium-Rich Layered Oxide Cathodes: Progress and Perspectives

机译：富含镍和富含锂的层状氧化物阴极：进度和观点

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摘要

Ni-rich layered oxides and Li-rich layered oxides are topics of much research interest as cathodes for Li-ion batteries due to their low cost and higher discharge capacities compared to those of LiCoO2 and LiMn2O4. However, Ni-rich layered oxides have several pitfalls, including difficulty in synthesizing a well-ordered material with all Ni3+ ions, poor cyclability, moisture sensitivity, a thermal runaway reaction, and formation of a harmful surface layer caused by side reactions with the electrolyte. Recent efforts towards Ni-rich layered oxides have centered on optimizing the composition and processing conditions to obtain controlled bulk and surface compositions to overcome the capacity fade. Li-rich layered oxides also have negative aspects, including oxygen loss from the lattice during first charge, a large first cycle irreversible capacity loss, poor rate capability, side reactions with the electrolyte, low tap density, and voltage decay during extended cycling. Recent work on Li-rich layered oxides has focused on understanding the surface and bulk structures and eliminating the undesirable properties. Followed by a brief introduction, an account of recent developments on the understanding and performance gains of Ni-rich and Li-rich layered oxide cathodes is provided, along with future research directions.
机译：Ni的分层氧化物和富含量的层状氧化物是由于它们与LiCoO2和Limn2O4相比的低成本和更高的放电容量，因此锂离子电池的阴极是多么研究兴趣的主题。然而，富含Ni的分层氧化物具有几个缺陷，包括用所有Ni3 +离子合成良好有序的材料，可靠性，水分敏感性差，热失控反应差，以及由电解质副反应引起的有害表面层的形成。最近努力富含Ni的分层氧化物，以优化组合物和加工条件为中心，以获得受控散装和表面组合物以克服容量褪色。富含量的分层氧化物也具有负面方面，包括从晶格中的氧气丢失，在第一电荷期间，一个大的第一周期不可逆的容量损失，速率差，与电解质的副反应，延长循环期间的电压衰减和电压衰减。富含富富氧化物的最新工作集中于理解表面和散装结构并消除不希望的性质。其次是简要介绍，提供了近期对富含Ni的富含Ni和锂富含分层氧化物阴极的理解和性能收益的发展，以及未来的研究方向。

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  • 来源
    《Advanced energy materials》 |2016年第1期|1501010.1-1501010.23|共23页
  • 作者

    Manthiram Arumugam; Knight James C.; Myung Seung-Taek; Oh Seung-Min; Sun Yang-Kook;

  • 作者单位

    Univ Texas Austin McKetta Dept Chem Engn Electrochem Energy Lab Austin TX 78712 USA;

    Univ Texas Austin McKetta Dept Chem Engn Electrochem Energy Lab Austin TX 78712 USA;

    Sejong Univ Dept Nano Engn Seoul 143747 South Korea;

    Hanyang Univ Dept Energy Engn Seoul 133791 South Korea;

    Hanyang Univ Dept Energy Engn Seoul 133791 South Korea;

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