摘要: In this work, we investigate the influence of oxygen non-stoichiometry on the characteristics of LiNi0.8Co0.1Mn0.1O2 cathode material. Among the investigated samples, the level of Ni/Li disorder in the bulk and the thickness of auto-generated layer on the surface share the same trend as the amount of oxygen loss in LiNi0.8Co0.1Mn0.1O2 materials. It indicates that the aforementioned key structural in- stabilities should be tightly related to the oxygen defects and the induced structural relaxation. As a consequence of structural entirety, the sample with the least defects presents the highest discharge capacity (192.9 mAhg 1 at 0.1C), the best rate capability (160.1 mAhg 1 at 5C), and the most stable cyclibility (89.9% at 200th). Our results demonstrate that oxygen deficiency plays a key role to determine the electrochemical performance of high-nickel cathode materials.
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期刊:
JOURNAL OF POWER SOURCES
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分类:
物理学
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普通物理:统计和量子力学,量子信息等
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引用:
ChinaXiv:201705.00575
(或此版本
ChinaXiv:201705.00575V1)
DOI:10.12074/201705.00575V1
CSTR:32003.36.ChinaXiv.201705.00575.V1
- 推荐引用方式:
Bi, YJ [Bi, Yujing][ 1 ],Yang, WC [Yang, Wenchao][ 1 ],Du, R [Du, Rui][ 1 ],Zhou, JJ [Zhou, Jingjing][ 1 ],Liu, M [Liu, Meng][ 1 ],Liu, Y [Liu, Yang][ 1 ],Wang, DY [Wang, Deyu][ 1 ].(2017).Correlation of oxygen non-stoichiometry to the instabilities and electrochemical performance of LiNi0.8Co0.1Mn0.1O2 utilized in lithium ion battery.JOURNAL OF POWER SOURCES.[ChinaXiv:201705.00575]
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