文献类型：期刊文献

英文题名：Hybrid Solvent Coupled with Dual-Salt Electrolyte Enables High-Performance Lithium-Metal Batteries

作者：Chai, Ruiqi[1];Xu, Jipeng[1];Yan, Shixiu[1];Sun, Yaping[1];Lian, Cheng[1,2];Su, Haiping[1];Liu, Honglai[1,2];Li, Jingkun[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：17

期号：7

起止页码：10755

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20250717853188);WOS:【SCI-EXPANDED(收录号:WOS:001415252500001)】；

基金：This work was financially supported by the National Key R&D Program of China (2022YFA1503501), the National Natural Science Foundation of China (Nos. 22278127, 22078088, and 22102114), the Fundamental Research Funds for the Central Universities (No. 2022ZFJH004), and the open Foundation of Shanghai Jiao Tong University Shaoxing Research Institute of Renewable Energy and Molecular Engineering (No. JDSX2022013).

语种：英文

外文关键词：anion-rich solvation structure; dual-saltelectrolyte; hybrid solvent; lithium-metalbattery; solid electrolyte interface

摘要：Lithium-metal batteries (LMBs) are widely recognized as the next-generation energy storage technology due to their high energy density, while their commercialization is hindered by the low Coulombic efficiency and uncontrolled Li dendrite growth. To address these challenges, an anion-rich solvation structure is achieved by a hybrid solvent coupled with a dual-salt electrolyte. The strongly coordinating DTA binds tightly to Li+ in the first solvation sheath, while the weakly coordinating FEC occupies the second solvation shell. Moreover, FEC, with a weak coordinating ability, allows TFSI- and DFOB- to enter the primary solvation sheath. The anion-derived SEIs exhibit enhanced mechanical strength and ionic conductivity, leading to accelerated Li+ transport kinetics and inhibited Li dendrite growth. As a result, the Li||Cu half-cell employing a hybrid solvent coupled with a dual-salt electrolyte delivers an average Aurbach Coulombic efficiency of 99.0%. Moreover, the Li||LiNi0.8Co0.1Mn0.1O2 battery exhibits robust capacity retention of 90.8% over 300 cycles, demonstrating the viability of hybrid solvent coupled with dual-salt electrolyte in practical LMBs.