气候变化领域集成服务门户(CCPortal): Unveiling the mechanisms of lithium dendrite suppression by cationic polymer film induced solid-electrolyte interphase modification

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DOI	10.1039/d0ee00518e
	Unveiling the mechanisms of lithium dendrite suppression by cationic polymer film induced solid-electrolyte interphase modification
	Lee S.-Y.; Shangguan J.; Shangguan J.; Alvarado J.; Betzler S.; Harris S.J.; Doeff M.M.; Zheng H.
发表日期	2020
ISSN	17545692
起始页码	1832
结束页码	1842
卷号	13 期号:6
英文摘要	It is crucial to suppress lithium dendrite formation in lithium metal batteries. Formation of a good solid-electrolyte interphase (SEI) has been considered to be effective in limiting lithium dendrite growth. However, how the SEI may be modified during lithium deposition is hard to resolve due to challenges in in situ investigation of the SEI with fine details. We report an in situ study that uncovers the lithium dendrite suppression mechanism arising from SEI modification by a poly(diallyldimethylammonium chloride) (PDDA) cationic polymer film, using electrochemical liquid cell transmission electron microscopy (TEM). Lithium nanogranules are obtained in the presence of the polymer film. Chemical mapping of the deposits provides remarkable details of the SEI on individual nanogranules. It shows that lithium fluorides are uniformly distributed within the inner SEI layer of individual lithium nanogranules, arising from the instantaneous reaction of the deposited lithium with PF6- ions accumulated by the cationic polymer film, and thus the dendritic growth of lithium is prohibited. The ability to directly measure SEI chemistry at the nanoscale down to the individual nanograins in situ and unveil its correlation with the lithium deposition behavior opens future opportunities to explore unsolved mechanisms in batteries. © The Royal Society of Chemistry.
英文关键词	Chlorine compounds; Dendrimers; Deposition; Fluorine compounds; High resolution transmission electron microscopy; Lithium Fluoride; Lithium metallography; Polymer films; Seebeck effect; Semiconducting films; Solid electrolytes; Cationic polymers; Deposition behavior; In-situ investigations; Instantaneous reaction; Lithium dendrite; Poly(diallyldimethylammonium chloride); Solid electrolyte interphase; Suppression mechanism; Lithium batteries
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/189637
作者单位	Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; Department of Material Science and Engineering, University of California, Berkeley, CA, United States; Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
推荐引用方式 GB/T 7714	Lee S.-Y.,Shangguan J.,Shangguan J.,et al. Unveiling the mechanisms of lithium dendrite suppression by cationic polymer film induced solid-electrolyte interphase modification[J],2020,13(6).
APA	Lee S.-Y..,Shangguan J..,Shangguan J..,Alvarado J..,Betzler S..,...&Zheng H..(2020).Unveiling the mechanisms of lithium dendrite suppression by cationic polymer film induced solid-electrolyte interphase modification.Energy & Environmental Science,13(6).
MLA	Lee S.-Y.,et al."Unveiling the mechanisms of lithium dendrite suppression by cationic polymer film induced solid-electrolyte interphase modification".Energy & Environmental Science 13.6(2020).