Role of Anode Composition and Electrolyte Interactions on the Thermo-Electrochemical Stability of Sodium-Ion Batteries.

ABSTRACT: Sodium-ion batteries (SIBs) are promising for large-scale energy storage, owing to their resource abundance and low cost. However, long-term stability is constrained by complex interfacial interactions and microstructural degradation. This study investigates the mechanistic coupling between anode composition, electrolyte chemistry, and solid electrolyte interphase (SEI) evolution in full-cell SIBs employing sodium vanadium phosphate (NVP) cathodes. Pure tin (Sn), hard carbon (HC), and Sn-HC composite anodes were systematically evaluated with carbonate ester- and ether-based electrolytes. Microscopic and spectroscopic analyses reveal that Sn-rich electrodes undergo significant pulverization and unstable SEI formation, whereas HC maintains structural integrity and forms kinetically stable SE

SUBMITTER: Ranganathan P 

PROVIDER: S-EPMC12926938 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature