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Enabling High-Voltage Lithium Metal Batteries by Manipulating Solvation Structure in Ester Electrolyte |
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| Authors: | Yulin Jie Dr. Xiaojing Liu Zhanwu Lei Shiyang Wang Yawei Chen Fanyang Huang Prof. Ruiguo Cao Prof. Genqiang Zhang Dr. Shuhong Jiao |
| Affiliation: | 1. Hefei National Laboratory for Physical Science at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei, 230026 P.R. China These authors contributed equally to this work.;2. Hefei National Laboratory for Physical Science at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei, 230026 P.R. China Institute of Molecular Sciences and Engineering, Shandong University, Qingdao, 266237 P.R. China These authors contributed equally to this work.;3. Hefei National Laboratory for Physical Science at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China, Hefei, 230026 P.R. China |
| Abstract: | Lithium metal is an ideal electrode material for future rechargeable lithium metal batteries. However, the widespread deployment of metallic lithium anode is significantly hindered by its dendritic growth and low Coulombic efficiency, especially in ester solvents. Herein, by rationally manipulating the electrolyte solvation structure with a high donor number solvent, enhancement of the solubility of lithium nitrate in an ester-based electrolyte is successfully demonstrated, which enables high-voltage lithium metal batteries. Remarkably, the electrolyte with a high concentration of LiNO3 additive presents an excellent Coulombic efficiency up to 98.8 % during stable galvanostatic lithium plating/stripping cycles. A full-cell lithium metal battery with a lithium nickel manganese cobalt oxide cathode exhibits a stable cycling performance showing limited capacity decay. This approach provides an effective electrolyte manipulation strategy to develop high-voltage lithium metal batteries. |
| Keywords: | Elektrodenmaterialien Hochvolt-Batterien Lithium-Metall-Batterien Lithium-Solvatationshülle |