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Structural and electrochemical features of (Li2S) (SiS2)100– superionic glasses
- Source :
- Solid State Ionics. 344:115141
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- Silicon is easily available and thus its use in solid electrolytes in all-solid-state lithium-ion batteries can reduce the cost of the system. Thus, significant research attention is focused on (Li2S)x(SiS2)100−x glasses as solid electrolytes because they exhibit the highest ionic conductivities among Li ion conducting glasses. However, there is a paucity of details on how Li ions actually travel through an operating device. In the present work, four-probe AC impedance measurements, synchrotron X-ray diffraction experiments, and time-of-flight neutron diffraction experiments were performed using 7Li-enriched (7Li2S)x(SiS2)100−x glasses (x = 40, 50, and 60). We demonstrated the three-dimensional atomic configurations and conduction pathways of Li ions for (7Li2S)x(SiS2)100−x glasses via reverse Monte Carlo (RMC) modeling and bond valence sum (BVS) imaging. Specifically, BVS imaging indicated that the frameworks of the (Li2S)x(SiS2)100−x glasses facilitate high mobility of the conducting Li ions when compared with those of (Li2S)x(GeS2)100−x glasses and (Li2S)x(P2S5)100−x glasses.
- Subjects :
- Diffraction
Valence (chemistry)
Materials science
Silicon
Neutron diffraction
Analytical chemistry
Ionic bonding
chemistry.chemical_element
02 engineering and technology
General Chemistry
Reverse Monte Carlo
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
0104 chemical sciences
Ion
chemistry
Fast ion conductor
General Materials Science
0210 nano-technology
Subjects
Details
- ISSN :
- 01672738
- Volume :
- 344
- Database :
- OpenAIRE
- Journal :
- Solid State Ionics
- Accession number :
- edsair.doi...........14283fdb4eaebe646e46930d6418b3af