Preparation and electrochemical properties of ionic-liquid-modified Na3SbS4 membrane composite electrolytes

Abstract

Sulfide-based Na-ion solid electrolytes with high ionic conductivity are one of the most promising solid electrolytes for solid-state Na batteries. However, its poor chemical/electrochemical stability against Na metal leads to deterioration of interface. In addition, it is important to explore how to prepare sulfide-based composite membranes via solution method. Herein, Na 3 SbS 4 is deposited on glassfiber framework via aqueous solution and further incorporated with trace of ionic liquid (IL). The Na 3 SbS 4 composite pellets are well shaped avoiding the pressing process. The IL not only improves the Na 3 SbS 4-Na interfacial stability, but also fills the pores between the framework and Na 3 SbS 4 and thereby suppressing the dendrite formation. The Na plating/stripping tests on symmetric cells show polarization voltages lower than 0.1 V and stable cycling for more than 400 cycles under a current density of 0.1 mA cm-2 at room temperature. The cycling performance of the FeS 2 half-cells with the optimized electrolyte tested at 60°C is superior to that with organic liquid electrolyte.

Failure analysis of the Ge-substituted Li6PS5I with bare LiNi0.8Co0.1Mn0.1O2 and performance improvement via Li2ZrO3 coating

“…2b and S3 †). This value is even higher than the room temperature of some solid electrolytes, 59,60 providing the possibility to construct an all-solid-state battery that enables excellent performances under low operating temperatures. The activation energies of both samples can be deduced based on the temperature-dependent Li-ion conductivities.…”

O‐Tailored Microstructure‐Engineered Interface toward Advanced Room Temperature All‐Solid‐State Na Batteries

“…In view of the excellent battery properties, it is significant to deeply investigate the interfacial evolution to clarify how the NaPSO incorporation gains outstanding performance under the situation of ion‐electron mixed conducting interface induced by NSS decomposition. [ 4d,5b,24,37 ] Comprehensive analyses were performed using SEM‐EDS together with XPS and XRD. During the long‐term cycling, the sandwich‐structured battery splits automatically into two parts from the middle (Figure S10, Supporting Information) after detached from the cell holder.…”

Recent progress and strategic perspectives of inorganic solid electrolytes: fundamentals, modifications, and applications in sodium metal batteries

“…19. The typical approaches include doping elements (Cl À and Ca 2+ ) to stabilize the interface, 541,544,576 designing composite electrolytes, 577,584,585 surface coating or interlayer insertion, 566,578,579,586 and hydrationinduced surface passivation. 306 For example, by homogeneously coating the PEO layer on the surface of Na 3 PS 4 , its immediate contact metallic Na anode was artificially avoided, thus alleviating the unpleasant interfacial reactions between them.…”