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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.; Zhang, Q (reprint author), Nankai Univ, Minist Educ, Key Lab Adv Energy Mat Chem, Tianjin 300071, Peoples R China.
2018-01-15
发表期刊ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
ISSN1433-7851
卷号57期号:3页码:734-737
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.
部门归属[chen, xiang ; shen, xin ; peng, hong-jie ; cheng, xin-bing ; li, bo-quan ; zhang, xue-qiang ; zhang, qiang] tsinghua univ, dept chem engn, beijing key lab green chem react engn & technol, beijing 100084, peoples r china ; [li, bo] chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, liaoning, peoples r china ; [huang, jia-qi] beijing inst technol, adv res inst multidisciplinary sci, beijing 100081, peoples r china ; [zhang, qiang] nankai univ, minist educ, key lab adv energy mat chem, tianjin 300071, peoples r china
关键词Lithium-sulfur Batteries Rechargeable Batteries Deposition Stability Carbonate Liquid
学科领域Chemistry, Multidisciplinary
资助者National Key Research and Development Program [2016YFA0202500, 2016YFA0200102]; National Natural Scientific Foundation of China [21676160]
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/79580
专题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.
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