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DOI	10.1039/d0ee02769c
	Beyond the concentrated electrolyte: Further depleting solvent molecules within a Li+solvation sheath to stabilize high-energy-density lithium metal batteries
	Chang Z.; Qiao Y.; Yang H.; Deng H.; Zhu X.; He P.; Zhou H.
发表日期	2020
ISSN	17545692
起始页码	4122
结束页码	4131
卷号	13 期号:11
英文摘要	The detrimental decomposition of electrolytes, in particular the dehydrogenation of solvents, would accelerate the degradation of batteries and hinder the development of high-energy-density lithium-metal batteries (LMBs). The purpose of building classic concentrated electrolytes is to decrease the proportion of solvents, so that the solvent-related parasitic reactions can be suppressed. However, accompanied by the reduction of solvents, the electrolyte concentration processes would reach their limits when saturated states are achieved. Herein, beyond the concentrated electrolytes (solvent-definite state), an electrolyte with a more aggregative configuration was obtained after further depleting the solvent molecules within a Li+ solvation sheath. The prepared electrolyte demonstrated a largely expanded electrochemical stability window (enlarged from 4.5 V to 5.4 V vs. Li/Li+), enhanced stability towards high-Ni NCM-811 cathode and thin cathode electrolyte interlayer (CEI) films. Assembled with high-voltage cathodes (NCM-811 and 5.0 V-class LiCoMnO4 (LCMO)) and limited excess lithium metal, high-energy-density LMB full cells (above 630 W h kg-1) with ultra-stable cycling performance were achieved. We expect this electrolyte design strategy to expand the family of electrolytes and remedy the inherent defects of conventional electrolytes for high-energy-density LMBs. © The Royal Society of Chemistry.
英文关键词	Cathodes; Lithium; Lithium batteries; Lithium compounds; Manganese compounds; Molecules; Solvation; Solvents; Design strategies; Electrochemical stabilities; Electrolyte concentration; Enhanced stability; High energy densities; High voltage cathode; Parasitic reaction; Solvent molecules; Electrolytes; building; concentration (composition); electrolyte; lithium; performance assessment; reaction kinetics; solvent
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/189473
作者单位	Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Umezono, Tsukuba, 305-8568, Japan; Graduate School of System and Information Engineering, University of Tsukuba, 1-1-1, Umezono, Tsukuba, 305-8573, Japan; Center of Energy Storage Materials and Technology, College of Engineering and Applied Sciences, Jiangsu Key Laboratory of Artificial Functional Materials, National Laboratory of Solid State Micro-Structures, Collaborative Innovation Center of Advanced Micro-Structures, Nanjing University, Nanjing, 210093, China
推荐引用方式 GB/T 7714	Chang Z.,Qiao Y.,Yang H.,et al. Beyond the concentrated electrolyte: Further depleting solvent molecules within a Li+solvation sheath to stabilize high-energy-density lithium metal batteries[J],2020,13(11).
APA	Chang Z..,Qiao Y..,Yang H..,Deng H..,Zhu X..,...&Zhou H..(2020).Beyond the concentrated electrolyte: Further depleting solvent molecules within a Li+solvation sheath to stabilize high-energy-density lithium metal batteries.Energy & Environmental Science,13(11).
MLA	Chang Z.,et al."Beyond the concentrated electrolyte: Further depleting solvent molecules within a Li+solvation sheath to stabilize high-energy-density lithium metal batteries".Energy & Environmental Science 13.11(2020).