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DOI	10.1039/c7ee02443f
	Effect of composition on the structure of lithium- and manganese-rich transition metal oxides
	Shukla A.K.; Ramasse Q.M.; Ophus C.; Kepaptsoglou D.M.; Hage F.S.; Gammer C.; Bowling C.; Gallegos P.A.H.; Venkatachalam S.
发表日期	2018
ISSN	17545692
起始页码	830
结束页码	840
卷号	11 期号:4
英文摘要	The choice of chemical composition of lithium- and manganese-rich transition metal oxides used as cathode materials in lithium-ion batteries can significantly impact their long-term viability as storage solutions for clean energy automotive applications. Their structure has been widely debated: conflicting conclusions drawn from individual studies often considering different compositions have made it challenging to reach a consensus and inform future research. Here, complementary electron microscopy techniques over a wide range of length scales reveal the effect of lithium-to-transition metal-ratio on the surface and bulk structure of these materials. We found that decreasing the lithium-to-transition metal-ratio resulted in a significant change in terms of order and atomic-level local composition in the bulk of these cathode materials. However, throughout the composition range studied, the materials consisted solely of a monoclinic phase, with lower lithium content materials showing more chemical ordering defects. In contrast, the spinel-structured surface present on specific crystallographic facets exhibited no noticeable structural change when varying the ratio of lithium to transition metal. The structural observations from this study warrant a reexamination of commonly assumed models linking poor electrochemical performance with bulk and surface structure. © 2018 The Royal Society of Chemistry.
英文关键词	Cathodes; Lithium-ion batteries; Structure (composition); Transition metals; Automotive applications; Chemical compositions; Crystallographic facets; Electrochemical performance; Long-term viability; Microscopy technique; Structural observations; Structured surfaces; Transition metal oxides; chemical composition; electrochemical method; electrode; equipment; lithium; manganese; oxide; performance assessment; transition element
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/190267
作者单位	Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; SuperSTEM, Daresbury, United Kingdom; National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Leoben, Austria; Envia Systems, Newark, CA, United States
推荐引用方式 GB/T 7714	Shukla A.K.,Ramasse Q.M.,Ophus C.,et al. Effect of composition on the structure of lithium- and manganese-rich transition metal oxides[J],2018,11(4).
APA	Shukla A.K..,Ramasse Q.M..,Ophus C..,Kepaptsoglou D.M..,Hage F.S..,...&Venkatachalam S..(2018).Effect of composition on the structure of lithium- and manganese-rich transition metal oxides.Energy & Environmental Science,11(4).
MLA	Shukla A.K.,et al."Effect of composition on the structure of lithium- and manganese-rich transition metal oxides".Energy & Environmental Science 11.4(2018).