| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials for Sustainable Hydrogen Energy
|
| Presentation Title |
Ti-Fe-O duplex hydrogen storage alloys for activation-free hydrogenation |
| Author(s) |
Jinwoo Kim, Young-Chul Yoon, Jaedong Kang, Krishnamohan Thekkepat, Seung-Cheol Lee, Young-Su Lee, Eun Soo Park |
| On-Site Speaker (Planned) |
Jinwoo Kim |
| Abstract Scope |
TiFe alloy is a promising hydrogen storage medium with a high volumetric hydrogen capacity and room-temperature reversibility. The major issue with this intermetallic compound alloy is the difficulty of initial hydrogenation due to the presence of a surface oxide layer, which acts as a barrier against hydrogen absorption. To make the alloy permeable to hydrogen, additional thermomechanical processes, generally called 'activation processes,' are required. In this study, we developed a series of alloys consisting of the TiFe phase and an oxygen-containing ternary phase by adding excessive oxygen to Ti-Fe alloys. The Ti-Fe-O alloys can be readily hydrogenated without any activation process while maintaining their hydrogen storage capacity close to that of the monolithic TiFe alloy. We systematically investigate the crystal structure of the ternary phase depending on oxygen content and how the phase composition affects the hydrogenation process of the overall alloy. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Phase Transformations, Characterization |