Iodine-rich lithium argyrodite with enhanced ionic conductivity for solid-state batteries

I-Rich Thioantimonate Argyrodite Glass-Ceramic Electrolyte with High Air Stability and Compatibility with Lithium

“…However, unlike Cl – and Br – , I – did not mix well with S 2– due to the large ionic radius size difference and had a low ionic conductivity of ∼10 –5 S/cm. However, a recent study confirmed that I – can be effectively incorporated into the S 2– site when argyrodite is treated with a glass-ceramic solid electrolyte system using only the ball-mill method. , Liu et al synthesized I-rich glass-ceramic argyrodite from Li 6– x PS 5– x I 1+ x and achieved a high ionic conductivity of 2 mS/cm. In the case of forming glass-ceramic argyrodite through a simple ball mill process rather than crystalline argyrodite solid electrolyte through conventional heat treatment, I was well incorporated into the S site, suggesting a new possibility of improving ion conductivity.…”

Unraveling the Loading Amount on Electrochemical Performances of a Lithium Argyrodite-Based All-Solid-State Lithium Battery

“…Lithium batteries with large energy density and high safety become more and more important for electric vehicles with boosting popularity. − However, the current organic liquid electrolytes utilized in lithium batteries face safety concerns because of the risk of flammability. − Moreover, the state of the liquid electrolyte requires special packing materials, lowering the volume energy density. Furthermore, the poor electrochemical stability of the liquid electrolyte toward current commercial cathode material especially at higher upper cutoff voltage largely limits the energy density. − Replacing the liquid electrolyte with nonflammable solid electrolytes to construct solid-state batteries can not only improve the safety but also provides the possibility to utilize cathode materials with high working voltage or high capacities. ,− Among different solid electrolytes, sulfide electrolytes deliver much higher ionic conductivities than other candidates, such as oxides and polymers. − …”

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

“…[33][34][35][36][37] However, compared to Li 6 PS 5 Cl, the low ionic conductivity of Li 6 PS 5 I is due to the absence of the site disorder in the structure, which is related to the high activation barriers for ion transport. [38][39][40][41] To improve the ionic conductivity of Li 6 PS 5 I, replacing P 5+ with Si 4+ , Ge 4+ , and Sn 4+ with different charge carrier densities and larger ionic radii can induce site disorder and expand the overall lattice volume, thus promoting the ionic conductivity. 42 In particular, the ionic conductivity can be further increased via Gesubstitution compared to the Si-and Sn-substitution, showing the application potential for high-performance SSBs.…”