2026-10-16T01:28:43Z https://data.mendeley.com/oai

oai:data.mendeley.com/ssy62w7cdg.1 2026-08-19T08:18:56Z

付, 有 Butylene Carbonate as a Cosolvent to Suppress Aluminum Corrosion in LiFSI Electrolytes for Long-Life Lithium-Ion Batteries Mendeley Data Lithium hexafluorophosphate (LiPF6) is currently the dominant lithium salt electrolyte in lithium-ion batteries (LIBs), while lithium bis(fluorosulfonyl)imide (LiFSI) is a promising alternative due to its superior stability and higher capacity retention. However, under high-voltage operating conditions, aluminum current collectors exhibit an inherent tendency toward electrochemical dissolution. This study introduces using 1,2-butylene carbonate (BC) to partially replace ethylene carbonate (EC) in the electrolyte to inhibit Al corrosion. The results reveal that the introduction of BC reduces the activity of FSI- through strong coordination with FSI-, and it weakens the interaction between EC and Li+ by forming strong hydrogen bond analogue with EC. This promotes the pairing of FSI- with Li+ to form an anion-cation aggregate (AGG), further reducing the activity of free FSI- with corrosion potential and an AlF3/LiF passivation layer can be formed on the aluminum collector surface. Furthermore, the LiFSI+BC system can form a thin and uniform cathode electrolyte interface (CEI) film over LiFePO4 (LFP). The LFP||Li battery assembled based on this electrolyte achieved a capacity retention rate of 99.58% after 500 stable cycles at a cut-off voltage of 3.8 V and a rate of 0.5C. This work provides an effective strategy toward developing of lithium-ion batteries with long cycle life. Lithium Battery Battery Corrosion Electrolyte Additive Yang, Chen Niu, Suyan Zhang, Houze Wang, Boyun Li, Dongxiang Zhang, Wenlong Ju, Na Liu, Zilong Shi, Lei Zhang, Zhigang Sun, Hongbin Xu, Guangwen Dataset doi:10.17632/ssy62w7cdg.1 oai:data.mendeley.com/ssy62w7cdg.1 Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0 https://data.mendeley.com/datasets/ssy62w7cdg 2026-08-19T08:18:56Z