气候变化领域集成服务门户(CCPortal): Electronic structure influences on the formation of the solid electrolyte interphase

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DOI	10.1039/d0ee01825b
	Electronic structure influences on the formation of the solid electrolyte interphase
	Song W.; Scholtis E.S.; Sherrell P.C.; Tsang D.K.H.; Ngiam J.; Lischner J.; Fearn S.; Bemmer V.; Mattevi C.; Klein N.; Xie F.; Riley D.J.
发表日期	2020
ISSN	17545692
起始页码	4977
结束页码	4989
卷号	13 期号:12
英文摘要	The solid electrolyte interphase (SEI) is critical for lithium-ion batteries (LIBs). Understanding and control over how the SEI is formed is therefore essential to develop LIBs with improved coulombic efficiency, lifetime and capacity. Previous research has focused on how variations in electrolyte chemistry and charging conditions can manipulate the SEI, yet there remains a fundamental lack of understanding surrounding the formation mechanism of the SEI. Specifically, there is minimal research on how the electrode material itself influences the formation of the SEI. Herein, chemically equivalent yet electronically distinct mono-, bi- and multi-layered graphene are used as LIB anodes. The formation of the SEI is probed with respect to kinetics, mechanism, morphology, and composition. SEI films on monolayer graphene contain high amounts of decomposition products from the salt (LiPF6) while on multilayer graphene, the films contain a large proportion of organic products. The basal plane of SEI films contains more organic species in the side close to the electrode than close to the electrolyte because of the intrinsic charge transfer between the solvents and graphitic anodes. We demonstrate that the composition of SEI films is tunable by modifying the reduction capability of the anode relative to the electrolyte where high reduction kinetics promotes LiPF6 decomposition; low reduction kinetics leads to more solvent decomposition and sluggish phase change during SEI deposition. This work provides fundamental insights into the influence of electrode electronic structure on SEI formation, and provides future directions to improve LIBs. This journal is © The Royal Society of Chemistry.
英文关键词	Anodes; Charge transfer; Electronic structure; Fluorine compounds; Graphene; Kinetics; Lithium compounds; Lithium-ion batteries; Multilayer films; Phosphorus compounds; Solid-State Batteries; Charging conditions; Coulombic efficiency; Decomposition products; Electrolyte chemistry; Multi-layered graphene; Multilayer graphene; Solid electrolyte interphase; Solvent decompositions; Solid electrolytes; detection method; electrolyte; instrumentation
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/189436
作者单位	Department of Materials and London Center for Nanotechnology, Imperial College London, United Kingdom; Department of Chemical Engineering, University of Melbourne, Parkville, VIC, Australia
推荐引用方式 GB/T 7714	Song W.,Scholtis E.S.,Sherrell P.C.,et al. Electronic structure influences on the formation of the solid electrolyte interphase[J],2020,13(12).
APA	Song W..,Scholtis E.S..,Sherrell P.C..,Tsang D.K.H..,Ngiam J..,...&Riley D.J..(2020).Electronic structure influences on the formation of the solid electrolyte interphase.Energy & Environmental Science,13(12).
MLA	Song W.,et al."Electronic structure influences on the formation of the solid electrolyte interphase".Energy & Environmental Science 13.12(2020).