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- Title
Lithium difluoro(oxalato)borate as an additive to suppress the aluminum corrosion in lithium bis(fluorosulfony)imide-based nonaqueous carbonate electrolyte.
- Authors
Yan, Guochun; Li, Xinhai; Wang, Zhixing; Guo, Huajun; Peng, Wenjie; Hu, Qiyang
- Abstract
Lithium bis(fluorosulfony)imide (LiFSI) is a promising alternative lithium salt to replace lithium hexafluorophosphate (LiPF) due to its high conductivity and excellent compatibility with electrode material. On the other hand, the aluminum corrosion caused by LiFSI hinders its application in lithium ion battery. To solve this problem, lithium difluoro(oxalato)borate (LiDFOB) is added to suppress the aluminum corrosion in LiFSI-based nonaqueous carbonate electrolyte. The electrochemical tests in three-electrode cells and graphite/LiCoO full cells confirm that the addition of LiDFOB is beneficial to suppress the aluminum corrosion. In addition, the mechanism is proposed that the oxidation products of LiDFOB form a passivating film at the aluminum surface to suppress the corrosion based on the experimental results from SEM and XPS tests.
- Subjects
BORATES; LITHIUM compounds; ALUMINUM; CORROSION &; anti-corrosives; CARBONATES; ELECTROLYTES; PASSIVATION
- Publication
Journal of Solid State Electrochemistry, 2016, Vol 20, Issue 2, p507
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-015-3069-3