Structural Origins of the Enhancement in Ionic Conductivity of a Chalcogenide Compound by Adding AgI

Abstract

Through a chemo-mechanical milling process, we prepared a highly conductive (1.1 × 10 À 3 S · cm À 1 ) amorphous 0.5AgI · 0.5 Ag 3 PS 4 conductor, which is much higher than that of pure amorphous Ag 3 PS 4 (8.5 × 10 À 4 S · cm À 1 ). Detailed structural characterizations indicate that compared to the ionic conductivity of the amorphous Ag 3 PS 4 conductor, the enhancement can be ascribed to the formation of mixed polymeric anions {[PS 4 ] m I n } around Ag + ions. Through heat-treatment at 370°C for 20 minutes, the room temperature ionic conductivity of the 0.5AgI · 0.5 Ag 3 PS 4 conductor is further enhanced by about 4 times. This enhancement can be ascribed to the following two aspects: 1) the existence of residual amorphous phase with higher ionic conductivity; 2) the connection of the fast ionic conductive interfaces between the deposited Ag 7 PS 6 nanocrystals and the residual amorphous phase. This work reveals the key roles of both disorder and interface in improving the ionic conductivity of solid-state electrolytes.

Effect of Se on Structure and Electrical Properties of Ge-As-Te Glass

“…The influence of temperature on electronic conductivity mainly includes the carrier mobility and carrier concentration, and the latter is the main reason in this work. It is common in electron (or hole) semiconductors and ionic conductors, because these two conductors are generally viewed as a thermal-activation process that jumps over the energy barrier [ 11 , 26 , 27 , 28 ]. That is to say, as the temperature increases, the concentration of carriers per unit volume inside the glass increases, and so does its conductivity.…”

Mass Spectrometry Imaging of N-Glycans from Formalin-Fixed Paraffin-Embedded Tissue Sections Using a Novel Subatmospheric Pressure Ionization Source

“…Recent N-glycoproteomic studies revealed that N-glycoproteins with heterogeneous Nglycans were highly expressed in mouse brain. [28][29][30][31] Therefore, to test the applicability of the novel SubAP/MALDI-MS platform for high resolution MS imaging acquisition, a 6 μmthick FFPE mouse brain coronal section was prepared and treated by PNGase F to release Nglycans for imaging analysis with a pixel size of 25μm. A total of 55 N-glycans including high-mannose N-glycans, fucosylated N-glycans and sialylated glycans were detected and annotated by the accurate mass matching (Figure S3, Table S1).…”