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DOI	10.1039/c8ee00001h
	Single-particle measurements of electrochemical kinetics in NMC and NCA cathodes for Li-ion batteries
	Tsai P.-C.; Wen B.; Wolfman M.; Choe M.-J.; Pan M.S.; Su L.; Thornton K.; Cabana J.; Chiang Y.-M.
发表日期	2018
ISSN	17545692
起始页码	860
结束页码	871
卷号	11 期号:4
英文摘要	The electrochemical kinetics of battery electrodes at the single-particle scale are measured as a function of state-of-charge, and interpreted with the aid of concurrent transmission X-ray microscopy (TXM) of the evolving particle microstructure. An electrochemical cell operating with near-picoampere current resolution is used to characterize single secondary particles of two widely-used cathode compounds, NMC333 and NCA. Interfacial charge transfer kinetics are found to vary by two orders of magnitude with state-of-charge (SOC) in both materials, but the origin of the SOC dependence differs greatly. NCA behavior is dominated by electrochemically-induced microfracture, although thin binder coatings significantly ameliorate mechanical degradation, while NMC333 demonstrates strongly increasing interfacial reaction rates with SOC for chemical reasons. Micro-PITT is used to separate interfacial and bulk transport rates, and show that for commercially relevant particle sizes, interfacial transport is rate-limiting at low SOC, while mixed-control dominates at higher SOC. These results provide mechanistic insight into the mesoscale kinetics of ion intercalation compounds, which can guide the development of high performance rechargeable batteries. © 2018 The Royal Society of Chemistry.
英文关键词	Battery management systems; Cathodes; Charge transfer; Charging (batteries); Intercalation compounds; Kinetics; Reaction rates; Concurrent transmission; Electrochemical kinetics; Interfacial charge transfer; Interfacial transport; Mechanical degradation; Orders of magnitude; Particle microstructure; Single particle measurements; Lithium-ion batteries; electric field; electrochemistry; electrode; ion; lithium; particle size; reaction kinetics; reaction rate; X-ray spectroscopy
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190270
作者单位	Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, United States; Department of Materials Science and Engineering, National Cheng Kung University, Tainan, Taiwan; Department of Chemistry, University of Illinois at Chicago, Chicago, IL, United States; Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, United States
推荐引用方式 GB/T 7714	Tsai P.-C.,Wen B.,Wolfman M.,et al. Single-particle measurements of electrochemical kinetics in NMC and NCA cathodes for Li-ion batteries[J],2018,11(4).
APA	Tsai P.-C..,Wen B..,Wolfman M..,Choe M.-J..,Pan M.S..,...&Chiang Y.-M..(2018).Single-particle measurements of electrochemical kinetics in NMC and NCA cathodes for Li-ion batteries.Energy & Environmental Science,11(4).
MLA	Tsai P.-C.,et al."Single-particle measurements of electrochemical kinetics in NMC and NCA cathodes for Li-ion batteries".Energy & Environmental Science 11.4(2018).