气候变化领域集成服务门户(CCPortal): Entropymetry for non-destructive structural analysis of LiCoO2 cathodes

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DOI	10.1039/c9ee02964h
	Entropymetry for non-destructive structural analysis of LiCoO2 cathodes
	Kim H.J.; Park Y.; Kwon Y.; Shin J.; Kim Y.-H.; Ahn H.-S.; Yazami R.; Choi J.W.
发表日期	2020
ISSN	1754-5692
起始页码	286
结束页码	296
卷号	13 期号:1
英文摘要	Upon the emergence of electric vehicles, accurate and non-destructive monitoring of battery electrode materials during operation is highly desirable. Structural degradation of widely adopted intercalation-based materials constitutes the origin of their capacity fading and safety deterioration. Here, we introduce entropymetry to monitor the structural changes of LiCoO2 (LCO) and its nickel (Ni)-doped derivatives at different states of charge (SOC). While simple lithium (Li) extraction on charging gives a monotonic decline of entropy change (ΔS) based on progressive vacancy occupation over Li sites, the presence of a monoclinic intermediate phase inverses the slope of the ΔS profile to reflect its limited atomic configurations with high ordering. Furthermore, Ni-doping lessens the ordering of the monoclinic phase, decreasing the height amplitude of ΔS profile in the monoclinic regime. The increased disorder by Ni-doping enhances the stability of the lattice framework, extending the cycle life with high voltage cut-off (4.6 V vs. Li/Li+). The present study highlights entropymetry as a unique, non-destructive tool in monitoring the structural ordering and relevant degradation of electrode materials in lithium-ion batteries. © 2020 The Royal Society of Chemistry.
语种	英语
scopus关键词	Cathodes; Charging (batteries); Deterioration; Lithium compounds; Lithium-ion batteries; Atomic configuration; Electrode material; Intermediate phase; Lattice framework; Non-destructive monitoring; Nondestructive tools; Structural degradation; Structural ordering; Nickel compounds; accuracy assessment; electrode; energy efficiency; entropy; extraction method; lithium; nickel
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162558
作者单位	School of Chemical and Biological Engineering and Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, South Korea; Korea Electronics Technology Institute (KETI), 11 World Cup buk-ro 54-gil, Mapo-gu, Seoul, 03924, South Korea; KVI PTE LTD, 2 Cleantech Loop, Singapore, 637144, Singapore
推荐引用方式 GB/T 7714	Kim H.J.,Park Y.,Kwon Y.,et al. Entropymetry for non-destructive structural analysis of LiCoO2 cathodes[J],2020,13(1).
APA	Kim H.J..,Park Y..,Kwon Y..,Shin J..,Kim Y.-H..,...&Choi J.W..(2020).Entropymetry for non-destructive structural analysis of LiCoO2 cathodes.Energy and Environmental Science,13(1).
MLA	Kim H.J.,et al."Entropymetry for non-destructive structural analysis of LiCoO2 cathodes".Energy and Environmental Science 13.1(2020).