Strategies for Mitigating Dissolution of Solid Electrolyte Interphases in Sodium-Ion Batteries.

ABSTRACT: The interfacial reactions in sodium-ion batteries (SIBs) are not well understood yet. The formation of a stable solid electrolyte interphase (SEI) in SIBs is still challenging due to the higher solubility of the SEI components compared to lithium analogues. This study therefore aims to shed light on the dissolution of SEI influenced by the electrolyte chemistry. By conducting electrochemical tests with extended open circuit pauses, and using surface spectroscopy, we determine the extent of self-discharge due to SEI dissolution. Instead of using a conventional separator, β-alumina was used as sodium-conductive membrane to avoid crosstalk between the working and sodium-metal counter electrode. The relative capacity loss after a pause of 50 hours in the tested electrolyte systems ranges up to

SUBMITTER: Ma LA 

PROVIDER: S-EPMC7986800 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature