General and simple salts-mediating approach enables superior magnesium plating/stripping properties
Rechargeable Mg-metal batteries represent attractive alternatives to Li-ion/Li-metal counterparts owing to resource sustainability, cost and safety superiorities. Grignard reagents-based electrolytes enable Mg plating/stripping reversibly, but properties are still not satisfactory. In this work, a g...
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Elsevier
2025-04-01
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| Series: | Next Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2949821X25000109 |
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| author | Ning Yuan Jing Liu Wenhao Sun Min Wang Changming Mao Kun Chao Zhenfang Zhou Xiaosong Guo Zhonghua Zhang Guicun Li |
| author_facet | Ning Yuan Jing Liu Wenhao Sun Min Wang Changming Mao Kun Chao Zhenfang Zhou Xiaosong Guo Zhonghua Zhang Guicun Li |
| author_sort | Ning Yuan |
| collection | DOAJ |
| description | Rechargeable Mg-metal batteries represent attractive alternatives to Li-ion/Li-metal counterparts owing to resource sustainability, cost and safety superiorities. Grignard reagents-based electrolytes enable Mg plating/stripping reversibly, but properties are still not satisfactory. In this work, a general and simple salts-mediating approach is proposed to enrich electrochemically-active species in Grignard reagents-based electrolytes. This hybrid electrolyte exhibits high ionic conductivity of 19.47 mS cm−1 (vs. 5.65 mS cm−1 for pure electrolytes), desirable electrochemical window (2.75 V vs. 1.75 V for pure electrolytes), exceptional Mg plating/stripping properties (140 cycles vs. 40 cycles for pure electrolytes). After introducing magnesium bis(trifluoromethanesulfonimide)/diglyme (abbreviated as “Mg(TFSI)2/G2”), originally negatively-charged ion pair species, such as [MgCl3]− and [Mg2Cl5]−, that adversely contribute to ionic conductivity and charge transfer processes, transform to active cations of [Mg(G2)2]2+ and [MgCl]+ through Mg2+-assisted Mg-Cl bond dissociation. This greatly improves active ion accessibility for Mg-metal anode and is beneficial for uniform Mg electrodeposition. In addition, unique MgCl-rich and carbonyl organic compounds-containing interphases are unveiled, which is conducive to active Mg electrodeposition. This general and simple salts-mediating approach can be extended to design better electrolytes for next-generation multivalent-metal batteries. |
| format | Article |
| id | doaj-art-caa6d703c92643dabc3b5b5613a0fa86 |
| institution | Kabale University |
| issn | 2949-821X |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Next Energy |
| spelling | doaj-art-caa6d703c92643dabc3b5b5613a0fa862025-02-05T04:32:55ZengElsevierNext Energy2949-821X2025-04-017100247General and simple salts-mediating approach enables superior magnesium plating/stripping propertiesNing Yuan0Jing Liu1Wenhao Sun2Min Wang3Changming Mao4Kun Chao5Zhenfang Zhou6Xiaosong Guo7Zhonghua Zhang8Guicun Li9College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR ChinaDepartment of Pharmacy, Jining Medical University, Rizhao 276826, PR ChinaCollege of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR ChinaCollege of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR ChinaCollege of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR ChinaCollege of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, PR China; Corresponding authors.College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR ChinaCollege of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR ChinaCollege of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China; Corresponding authors.College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR ChinaRechargeable Mg-metal batteries represent attractive alternatives to Li-ion/Li-metal counterparts owing to resource sustainability, cost and safety superiorities. Grignard reagents-based electrolytes enable Mg plating/stripping reversibly, but properties are still not satisfactory. In this work, a general and simple salts-mediating approach is proposed to enrich electrochemically-active species in Grignard reagents-based electrolytes. This hybrid electrolyte exhibits high ionic conductivity of 19.47 mS cm−1 (vs. 5.65 mS cm−1 for pure electrolytes), desirable electrochemical window (2.75 V vs. 1.75 V for pure electrolytes), exceptional Mg plating/stripping properties (140 cycles vs. 40 cycles for pure electrolytes). After introducing magnesium bis(trifluoromethanesulfonimide)/diglyme (abbreviated as “Mg(TFSI)2/G2”), originally negatively-charged ion pair species, such as [MgCl3]− and [Mg2Cl5]−, that adversely contribute to ionic conductivity and charge transfer processes, transform to active cations of [Mg(G2)2]2+ and [MgCl]+ through Mg2+-assisted Mg-Cl bond dissociation. This greatly improves active ion accessibility for Mg-metal anode and is beneficial for uniform Mg electrodeposition. In addition, unique MgCl-rich and carbonyl organic compounds-containing interphases are unveiled, which is conducive to active Mg electrodeposition. This general and simple salts-mediating approach can be extended to design better electrolytes for next-generation multivalent-metal batteries.http://www.sciencedirect.com/science/article/pii/S2949821X25000109Magnesium batteriesElectrolytesElectrodepositionsDissociation kineticsGrignard reagents |
| spellingShingle | Ning Yuan Jing Liu Wenhao Sun Min Wang Changming Mao Kun Chao Zhenfang Zhou Xiaosong Guo Zhonghua Zhang Guicun Li General and simple salts-mediating approach enables superior magnesium plating/stripping properties Next Energy Magnesium batteries Electrolytes Electrodepositions Dissociation kinetics Grignard reagents |
| title | General and simple salts-mediating approach enables superior magnesium plating/stripping properties |
| title_full | General and simple salts-mediating approach enables superior magnesium plating/stripping properties |
| title_fullStr | General and simple salts-mediating approach enables superior magnesium plating/stripping properties |
| title_full_unstemmed | General and simple salts-mediating approach enables superior magnesium plating/stripping properties |
| title_short | General and simple salts-mediating approach enables superior magnesium plating/stripping properties |
| title_sort | general and simple salts mediating approach enables superior magnesium plating stripping properties |
| topic | Magnesium batteries Electrolytes Electrodepositions Dissociation kinetics Grignard reagents |
| url | http://www.sciencedirect.com/science/article/pii/S2949821X25000109 |
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