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Updated: Jun 12, 2025

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
Published on: November 11, 2013
Construction of Cation-Conducting and Anion-Capture Solid Electrolyte Interphase for Highly Stable Sodium Metal
Boqian Yi1, Zhixuan Wei1, Yangyang Xia1
1Key Laboratory of Physics and Technology for Advanced Batteries, Ministry of Education, State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, P. R. China.
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+ ion conductor, Na5GdSi4O12, with oxygen vacancies (NGSO-Vo), onto a glass fiber (GF) separator. This unique structure combines fast Na+ conduction (8.55 mS cm-1) with anion immobilization, achieving a high Na+ transference number (0.9) in a conventional NaClO4/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-2) and long-term cycling (1500 h at 20 mA cm-2). Moreover, Na3V2(PO4)2F3||Na pouch cells with high mass loading (24 mg cm-2) 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.
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