ArticleNature communications2026
Dual-domain solvent-locked electrolyte enabled durable 4.5 V-class sodium batteries.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Sodium-ion batteries hold significant promise for sustainable energy storage by addressing resource scarcity and safety concerns. Elevating the upper-cut-off voltage is crucial for sodium-ion batteries to maximize electrode capacity and narrow their energy-density gap with commercial lithium-ion batteries. However, conventional electrolytes exhibit electrochemical instability on the highly desodiated positive electrode surface, undergoing strongly electrophilic attack and continuous decomposition that results in oligomer-rich interphases and rapid capacity fading. Here, we design a solvent-locked carbonate electrolyte creating electrochemically stable solvent-reinforced solvation structure and anion-rich interfacial shield-derived boride-/fluoride-rich interphase on positive electrode, thereby suppressing current leakage and parasitic reactions. The tailored electrolyte exhibits good compatibility with commercialized oxides and polyanionic positive electrodes. As-assembled Na||Na
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