About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Neutron and X-ray Scattering in Materials Science
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Presentation Title |
Unveiling Structural Disorders and Their Correlation with Ionic Conductivity in a Potential Na-Ion Battery Material: Na2Mn3O7 |
Author(s) |
Bikash Chandra Saha, Anup Kumar Bera, Seikh Mohammad Yusuf |
On-Site Speaker (Planned) |
Bikash Chandra Saha |
Abstract Scope |
In the present study, crystal structure and ionic conduction properties of the technologically important 2D layered Na-ion battery material Na2Mn3O7 have been investigated by x-ray diffraction, neutron diffraction and impedance spectroscopy. Our study reveals the layered crystal structure contains a significant amount of stacking faults of the manganese-oxygen Mn3O72- layers as evident from the asymmetric broadening of selective nuclear Bragg peaks in the neutron diffraction pattern. Comprehensive impedance spectroscopy study and its data analysis in the form of dc-conductivity, ac-conductivity, electrical modulus, and dielectric constant reveal a long-range Na-ionic conductivity. The role of stacking faults on the Na-ion conduction properties has been brought out by investigating the samples that were prepared with varying annealing time (4, 14, and 28 h). The derived results establish a correlation between the stacking faults and the ionic conductivity where the conductivity increases with the reducing stacking faults of the crystal structure. |
Proceedings Inclusion? |
Planned: |
Keywords |
Energy Conversion and Storage, |