Aluminum Corrosion Chemistry in High-Voltage Lithium Metal Batteries with LiFSI-Based Ether Electrolytes

被引:0
|
作者
Chen, Yawei [1 ]
Huang, Fanyang [1 ]
Xie, Miao [2 ]
Han, Yehu [3 ]
Li, Wanxia [1 ]
Jie, Yulin [3 ]
Zhu, Xingbao [4 ]
Cheng, Tao [2 ]
Cao, Ruiguo [3 ]
Jiao, Shuhong [1 ]
机构
[1] Univ Sci & Technol China, Key Lab Precis & Intelligent Chem, Hefei 230026, Peoples R China
[2] Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Peoples R China
[3] Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China
[4] Hefei Got High Tech Power Energy Co Ltd, Hefei 230011, Peoples R China
关键词
aluminum corrosion; high voltage; ether electrolytes; solvent decomposition; high-concentration electrolytes; lithium metal batteries; EFFICIENCY; ANODE;
D O I
10.1021/acsami.4c09083
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
High-voltage Li metal batteries (LMBs) based on ether electrolytes hold potential for achieving high energy densities exceeding 500 Wh kg(-1), but face challenges with electrolyte oxidative stability, particularly concerning aluminum (Al) current collector corrosion. However, the specific chemistry behind Al corrosion and its effect on electrolyte components remains unexplored. Here, our study delves into Al corrosion in the representative LiFSI-DME electrolyte system, revealing that low-concentration electrolytes exacerbate Al current collector corrosion and solvent decomposition. In contrast, high-concentration electrolytes mitigate these issues, enhancing long-term stability. Remarkably, LiFSI-0.7DME electrolyte demonstrates exceptional stability with up to 1000 cycles at high voltage without significant capacity decay. These findings offer crucial insights into Al corrosion mechanisms in ether-based electrolytes, advancing our comprehension of high-voltage LMBs and facilitating their development for practical applications.
引用
收藏
页码:47581 / 47589
页数:9
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