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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Enhanced high-voltage cycling stability of Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode coated with Li2O-2B(2)O(3)
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Enhanced high-voltage cycling stability of Ni-rich LiNi0.8Co0.1Mn0.1O2 cathode coated with Li2O-2B(2)O(3)

机译：增强富含Ni的LiNi0.1MN0.1MN0.1O2阴极的高压循环稳定性，涂有Li 2 O-2B（2）O（3）

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摘要

LiNi0.8Co0.1Mn0.1O2 (NCM811) is considered one of the most competitive cathode materials for lithium-ion batteries for use in next-generation electric vehicles. However, the poor cycle stability of layered Ni-rich cathode materials at high voltages (>4.3 V) has hindered their commercial development. In this study, we evaluate the effects of lithium boron oxide (LBO) glass as a lithium-ion-conductive coating layer on the structure, morphology, and electrochemical properties of NCM811 at a high cutoff voltage of 4.5 V. We show that NCM811 coated with 0.3 wt% LBO exhibits improved cycling retention (82.1%) compared with bare NCM811 (50.8%) after 100 cycles at 1C. Electrochemical impedance spectra and scanning electron microscopy and transmission electron microscopy images after cycling reveal that the LBO-coating layer not only lowered the charge-transfer resistance between the electrode and electrolyte but also improved the structural stability during cycling. (C) 2019 Elsevier B.V. All rights reserved.
机译：LINI0.8CO0.1MN0.1O2（NCM811）被认为是用于下一代电动车辆的锂离子电池最竞争激烈的阴极材料之一。然而，在高电压（> 4.3V）下层状Ni的阴极材料的较差的循环稳定性阻碍了它们的商业发展。在这项研究中，我们评估锂氧化锂（LBO）玻璃作为锂离子导电涂层的影响，在4.5V的高截止电压下NCM811的结构，形貌和电化学性能。我们显示NCM811涂层对于0.3wt％LBO，在100℃下在100次循环后，尚能改善循环保留（82.1％）与裸NCM811（50.8％）。电化学阻抗谱和扫描电子显微镜和透射电子显微镜图像循环揭示LBO涂层不仅降低了电极和电解质之间的电荷转移电阻，而且还改善了循环期间的结构稳定性。 （c）2019 Elsevier B.v.保留所有权利。

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