Concentrated LiFSI-Ethylene Carbonate Electrolytes and Their Compatibility with High-Capacity and High-Voltage Electrodes.

ABSTRACT: The unusual physical and chemical properties of electrolytes with excessive salt contents have resulted in rising interest in highly concentrated electrolytes, especially for their application in batteries. Here, we report strikingly good electrochemical performance in terms of conductivity and stability for a binary electrolyte system, consisting of lithium bis(fluorosulfonyl)imide (LiFSI) salt and ethylene carbonate (EC) solvent. The electrolyte is explored for different cell configurations spanning both high-capacity and high-voltage electrodes, which are well known for incompatibilities with conventional electrolyte systems: Li metal, Si/graphite composites, LiNi_0.33Mn_0.33Co_0.33O₂ (NMC111), and LiNi_0.5Mn_1.5O₄

SUBMITTER: Aktekin B 

PROVIDER: S-EPMC8790720 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature