Li7P3S11/poly(ethylene oxide) hybrid solid electrolytes with excellent interfacial compatibility for all-solid-state batteries

Low‐Cost Raw Materials Synthesized Na2.9375PS3.9375Cl0.0625 Solid Electrolyte

“…As PEO–NaClO 4 filled in the space between NPSC particles, the interfacial resistance of solid electrolyte could be reduced, thus increasing the ionic conductivity of composite electrolyte. [ 13,17 ] And the EDS spectrum (Figure 2e,f) further confirmed the structure of NPSC with sulfur, phosphorus, sodium, and chlorine, and the weight ratio was consistent with the molecular formula Na 2.9375 PS 3.9375 Cl 0.0625 .…”

“…However, Na 3− x PS 4− x Cl x (NPSC) solid electrolyte has high ionic conductivity but poor compatibility with electrodes. Recently, polyethylene oxide (PEO)‐based solid electrolytes have attracted much attention because of its favorable interface compatibility with sodium foil and its great flexibility, [ 11–13 ] while typically have low ionic conductivity, which limit their applications. [ 14,15 ] By combining the virtues of PEO electrolytes and NPSC electrolytes, it not only has good interface contact with the electrode but also greatly improved the conductivity, which has attracted increasing interest.…”

Composite solid electrolyte of Na3PS4-PEO for all-solid-state SnS2/Na batteries with excellent interfacial compatibility between electrolyte and Na metal

“…And the aggregation become more seriously with PEO-NaClO 4 content increase. As PEO-NaClO 4 filled in the space between Na 3 PS 4 particles, the interfacial resistance of solid electrolyte could be reduced, thus increasing the ionic conductivity of composite electrolyte [21,22] . More importantly, the PEO layer could isolate Na 3 PS 4 and Na metal and suppress the reaction between electrolyte and Na foil, which enhanced the electrochemical performance of the all-solid-state battery.…”

“…However, the ionic conductivity of the composite Na 3 PS 4 -PEO electrolytes decreases with more PEO-NaClO 4 doping. That is because a thick PEO layer would impede Na-ion transfer and diffusion as PEO-NaClO 4 solid electrolyte has a low ionic conductivity ( ∼10 −7 S/cm) at room temperature [21][22][23][24] . The composite solid electrolyte with the optimum 4 wt% PEO-NaClO 4 content shows the highest ionic conductivity, and we use it for all the following experiments and denoted as NPS-PEO.…”

In Situ Ion‐Conducting Protective Layer Strategy to Stable Lithium Metal Anode for All‐Solid‐State Sulfide‐Based Lithium Metal Batteries

“…reported that employing polymer layer of polyethylene oxide (PEO)–LiClO 4 could isolate lithium electrode and Li 7 P 3 S 11 , suppressing the interface reaction. [ 18 ] Xu et al. proposed that a manipulated and highly conductive LiH 2 PO 4 protective layer was employed in LGPS and Li anode.…”