AI Article Synopsis
- Researchers developed a new type of sodium-ion solid-state electrolyte called NaPSCl, which is chlorine-rich and has shown significant improvements in ionic conductivity compared to previous versions, reaching a peak conductivity of 1.2 × 10 S/cm at 25 °C.
- The study found that the increased chlorine content enhanced both ionic conductivity and electrochemical stability while lowering activation energy, making the NaPSCl composite a pure ionic conductor without electronic conductivity.
- Testing in a lab-scale all-solid-state sodium battery demonstrated stable performance, showing the potential of NaPSCl as an effective electrolyte and highlighting an anion-modulation strategy for future solid-state electrolyte development.
Article Abstract
Developing argyrodite-type, chlorine-rich, sodium-ion, solid-state electrolytes with high conductivity is a long-term challenge that is crucial for the advancement of all-solid-state batteries (ASSBs). In this study, chlorine-rich, argyrodite-type NaPSCl solid solutions were successfully developed with a solid solution formation range of 0 ≤ ≤ 0.5. NaPSCl ( = 0.5), displaying a highest ionic conductivity of 1.2 × 10 S/cm at 25 °C, which is more than a hundred times higher than that of NaPSCl. Cyclic voltammetry and electrochemical impedance spectroscopy results demonstrated that the rich chlorine significantly enhanced the ionic conductivity and electrochemical stability, in addition to causing a reduction in activation energy. The NaPSCl composite also showed the characteristics of a pure ionic conductor without electronic conductivity. Finally, the viability of NaPSCl as a sodium electrolyte for all-solid-state sodium batteries was checked in a lab-scale ASSB, showing stable battery performance. This study not only demonstrates new composites of sodium-ionic, solid-state electrolytes with relatively high conductivity but also provides an anion-modulation strategy to enhance the ionic conductivity of argyrodite-type sodium solid-state ionic conductors.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11084612 | PMC |
| http://dx.doi.org/10.3390/ma17091980 | DOI Listing |
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