ABSTRACT
Sulfide electrolytes represent a crucial category of superionic conductors for all-solid-state lithium metal batteries. Among sulfide electrolytes, glassy sulfide is highly promising due to its long-range disorder and grain-boundary-free nature. However, the lack of comprehension regarding glass formation chemistry has hindered their progress. Herein, we propose interstitial volume as the decisive factor influencing halogen dopant solubility within a glass matrix. We engineer a Li3PS4-Li4SiS4 complex structure within the sulfide glassy network to facilitate the release of interstitial volume. Consequently, we increase the dissolution capacity of LiI to 40 mol% in 75Li2S-25P2S5 glass. The synthesized glass exhibits one of the highest ionic conductivities among reported glass sulfides. Furthermore, we develop a glassy/crystalline composite electrolyte to mitigate the shortcomings of argyrodite-type sulfides by utilizing our synthesized glass as the filler. The composite electrolytes effectively mitigate Li intrusion. This work unveils a protocol for the dissolution of halogen dopants in glass electrolytes.
ABSTRACT
In this study, a novel intelligent antimicrobial model was constructed based on the antibiotic properties of nano-silver and the ion-exchange response of dehydrated alginate (Alg) gel. Through the process of reducing reaction, hydrogel formation and dehydration, the model composed of Alg and nano-silver was fabricated. The distinguished feature of this model lies in its antimicrobial properties and biocompatibility. In this model, the releasing level of nano-silver is determined by the outside-in swelling of Alg composites, which is further self-regulated by the volume of wound exudates. The results showed that the released nano-silver was intelligently maintained within a constant concentration range, so that it could be further designed to exhibit antimicrobial activity without cytotoxicity. Furthermore, the murine wound infection model conducted with these composites resulted in a significant decrease of bacteria number. The self-regulating swelling feature based on the ion-exchange response of Alg along with the controlled release of nano-silver made this composite a promising intelligent model for antimicrobial wound dressing applications.
