A solid dual-salt plastic crystal electrolyte enabling rapid ion transfer and stable interphases for high-performance solid-state sodium ion batteries.

ABSTRACT: As promising next-generation energy storage systems, solid-state sodium ion batteries (SIBs) are hindered by the low ionic conductivity of their solid electrolytes and poor interfacial compatibility. Here, we developed a solid dual-salt plastic crystal electrolyte (PCE) composed of succinonitrile (SN), fluoroethylene carbonate (FEC), and dual salts (NaClO₄ and NaBF₄). The synergistic redox reactions of FEC and BF₄ ^- form a robust, F- and B-rich interphase at electrode/electrolyte interfaces, which significantly enhances interfacial stability and minimizes side reactions that cause cell degradation. Meanwhile, the derived interphase combined with SN's intrinsic oxidation stability endows the PCE with high-voltage tolerance (≥4.75 V), enabling stab

SUBMITTER: Jiang Y 

PROVIDER: S-EPMC12797248 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature