Dipole-dipole interaction-induced dense primitive solid-electrolyte interphase for high-power Ah-level anode-free sodium metal batteries.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 41022750.
- Also identified by DOI 10.1038/s41467-025-63593-x and PMC identifier 12479860.
- Licence recorded as CC BY-NC-ND.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
High-energy and resource-abundant anode-free sodium metal batteries suffer from limited lifespan owing to dendrite growth and rapid capacity fading at early stages, particularly at high rate and high capacity. Here we report a preliminary surface-passivation strategy by highly fluorinated electrolyte, instantly forming a dense inorganic-dominant primitive solid-electrolyte interphase. Driven by dipole-dipole interaction, the spontaneously formed solid-electrolyte interphase is sufficiently dense to resist solvent decomposition and moisture attack, meanwhile regulating Na plating/stripping at high current densities and areal capacities up to 8 mA cm<sup>-2</sup> and 5 mAh cm<sup>-2</sup>, respectively. The fabricated anode-free batteries demonstrate long-term stability at high cathode loadings (10-15 mg cm<sup>-2</sup>) and high rates (1-3 C), even with moisture contained. Impressively, fast-charging Ah-level anode-free pouch cells deliver energy density up to 150 Wh kg<sup>-1</sup> (0.5 C) based on total cell weight, achieving power density as high as 152 W kg<sup>-1</sup> and long lifespan up to 700 cycles at 1 C.