About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Energy Materials for Sustainable Development
|
| Presentation Title |
Investigating Oxygen-Mediated Ionic Conductivity in Mo-Doped K2ZnV2O7 : A Promising Solid Oxide Electrolyte |
| Author(s) |
Deepanshu Kaneria, Kanhaiya Lal Yadav |
| On-Site Speaker (Planned) |
Deepanshu Kaneria |
| Abstract Scope |
Oxide ion conductors play a critical role in high-temperature electrochemical devices, particularly solid oxide fuel cells (SOFCs). In this work, we report the synthesis and systematic investigation of molybdenum-doped potassium zinc vanadate, K2ZnV2-xMoxO7+0.5x. The compounds were prepared via a conventional solid-state reaction route. Powder X-ray diffraction confirmed successful Mo⁶⁺ substitution at the V⁵⁺ site without secondary phase formation within the solubility limit. X-ray photoelectron spectroscopy verified the oxidation states of constituent elements and indicated the generation of oxygen-related defects to maintain charge neutrality. Electrical properties were evaluated using temperature-dependent electrochemical impedance spectroscopy over the range 300–600 °C. Nyquist analysis allowed clear separation of bulk and grain boundary contributions, and Mo-doped samples exhibited significantly enhanced total conductivity compared to the undoped composition. The enhanced conductivity is attributed to increased oxygen defect concentration. These results establish Mo-doped K₂ZnV₂O₇ as a promising electrolyte candidate for intermediate-temperature SOFCs and related electrochemical applications |