Construction of Cation-Conducting and Anion-Capture Solid Electrolyte Interphase for Highly Stable Sodium Metal Batteries.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40424194.
- Also identified by DOI 10.1021/acs.nanolett.5c02034.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
Sodium metal batteries are promising for grid-scale storage but suffer from dendrite growth due to anion-induced cation mobility limitations. To address this, we designed an artificial solid-electrolyte interphase (SEI) by grafting a fast Na<sup>+</sup> ion conductor, Na<sub>5</sub>GdSi<sub>4</sub>O<sub>12</sub>, with oxygen vacancies (NGSO-Vo), onto a glass fiber (GF) separator. This unique structure combines fast Na<sup>+</sup> conduction (8.55 mS cm<sup>-1</sup>) with anion immobilization, achieving a high Na<sup>+</sup> transference number (0.9) in a conventional NaClO<sub>4</sub>/PC electrolyte. The NGSO-Vo-modified GF exhibits exceptional mechanical stability, effectively suppressing dendrite growth. As a result, Na||Na symmetric cells achieve an ultrahigh current density (30 mA cm<sup>-2</sup>) and long-term cycling (1500 h at 20 mA cm<sup>-2</sup>). Moreover, Na<sub>3</sub>V<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>F<sub>3</sub>||Na pouch cells with high mass loading (24 mg cm<sup>-2</sup>) demonstrate a record stability (4000 h). This work presents a simple yet universal strategy to enhance Na-metal battery durability, paving the way for practical energy storage applications.