Ion-Solvent Complexes Promote Gas Evolution from Electrolytes on a Sodium Metal Anode

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	Ion-Solvent Complexes Promote Gas Evolution from Electrolytes on a Sodium Metal Anode
	Chen, X; Shen, X; Li, B; Peng, HJ; Cheng, XB; Li, BQ; Zhang, XQ; Huang, JQ; Zhang, Q; Zhang, Q (reprint author), Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, Peoples R China.
刊名	ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
	2018-01-15
卷号	57 期号:3 页码:734-737
关键词	Lithium-sulfur Batteries Rechargeable Batteries Deposition Stability Carbonate Liquid
ISSN号	1433-7851
英文摘要	Lithium and sodium metal batteries are considered as promising next-generation energy storage devices due to their ultrahigh energy densities. The high reactivity of alkali metal toward organic solvents and salts results in side reactions, which further lead to undesirable electrolyte depletion, cell failure, and evolution of flammable gas. Herein, first-principles calculations and insitu optical microscopy are used to study the mechanism of organic electrolyte decomposition and gas evolution on a sodium metal anode. Once complexed with sodium ions, solvent molecules show a reduced LUMO, which facilitates the electrolyte decomposition and gas evolution. Such a general mechanism is also applicable to lithium and other metal anodes. We uncover the critical role of ion-solvent complexation for the stability of alkali metal anodes, reveal the mechanism of electrolyte gassing, and provide a mechanistic guidance to electrolyte and lithium/sodium anode design for safe rechargeable batteries.; Lithium and sodium metal batteries are considered as promising next-generation energy storage devices due to their ultrahigh energy densities. The high reactivity of alkali metal toward organic solvents and salts results in side reactions, which further lead to undesirable electrolyte depletion, cell failure, and evolution of flammable gas. Herein, first-principles calculations and insitu optical microscopy are used to study the mechanism of organic electrolyte decomposition and gas evolution on a sodium metal anode. Once complexed with sodium ions, solvent molecules show a reduced LUMO, which facilitates the electrolyte decomposition and gas evolution. Such a general mechanism is also applicable to lithium and other metal anodes. We uncover the critical role of ion-solvent complexation for the stability of alkali metal anodes, reveal the mechanism of electrolyte gassing, and provide a mechanistic guidance to electrolyte and lithium/sodium anode design for safe rechargeable batteries.
学科主题	Chemistry, Multidisciplinary
语种	英语
资助机构	National Key Research and Development Program [2016YFA0202500, 2016YFA0200102]; National Natural Scientific Foundation of China [21676160]
公开日期	2018-06-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79580]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, Q (reprint author), Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, Peoples R China.; Zhang, Q (reprint author), Nankai Univ, Minist Educ, Key Lab Adv Energy Mat Chem, Tianjin 300071, Peoples R China.
推荐引用方式 GB/T 7714	Chen, X,Shen, X,Li, B,et al. Ion-Solvent Complexes Promote Gas Evolution from Electrolytes on a Sodium Metal Anode[J]. ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,2018,57(3):734-737.
APA	Chen, X.,Shen, X.,Li, B.,Peng, HJ.,Cheng, XB.,...&Zhang, Q .(2018).Ion-Solvent Complexes Promote Gas Evolution from Electrolytes on a Sodium Metal Anode.ANGEWANDTE CHEMIE-INTERNATIONAL EDITION,57(3),734-737.
MLA	Chen, X,et al."Ion-Solvent Complexes Promote Gas Evolution from Electrolytes on a Sodium Metal Anode".ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 57.3(2018):734-737.