A fluorine-free electrolyte for calcium metal batteries.

ABSTRACT: Calcium metal batteries (CMBs) have emerged as a promising alternative to lithium(Li)-based technologies due to calcium's (Ca) low reduction potential, high volumetric capacity, and abundance. However, challenges such as poor Ca²⁺ transport across passivation layers and limited electrolyte compatibility hinder practical implementation. Here, we report a fluorine-free electrolyte formulation based on calcium bis(methanesulfonimide) (Ca(MSI)₂) in dimethylacetamide (DMAc). This system offers a safer, more sustainable, and environmentally benign alternative to conventional fluorinated electrolytes. Comparative physicochemical and electrochemical evaluations with the benchmark Ca(TFSI)₂/DMAc electrolyte reveal that Ca(MSI)₂ enables stable calcium plat

SUBMITTER: Kachmar A 

PROVIDER: S-EPMC12679347 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature