A Study on the Volume Expansion of Vanadium-Based Alloy Powders and Compacts During Hydrogen Sorption
Storing hydrogen in solid metal hydrides provides a safe and efficient storage approach. However, the large volume expansion of metal hydrides during hydrogen absorption imposes substantial stresses on the wall of a hydrogen storage tank. In this study, volume expansion behavior of a V-based hydroge...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-12-01
|
| Series: | Inorganics |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2304-6740/12/12/318 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | Storing hydrogen in solid metal hydrides provides a safe and efficient storage approach. However, the large volume expansion of metal hydrides during hydrogen absorption imposes substantial stresses on the wall of a hydrogen storage tank. In this study, volume expansion behavior of a V-based hydrogen storage alloy, V<sub>61</sub>Cr<sub>24</sub>Ti<sub>12</sub>Ce<sub>3</sub>, with body-centered-cubic, was investigated using a self-developed in situ expansion testing device. The lattice expansion of the V<sub>61</sub>Cr<sub>24</sub>Ti<sub>12</sub>Ce<sub>3</sub> alloy after full hydrogenation was determined to be 37.85% using X-ray diffraction(XRD). The powder bed, composed of alloy powder with an average size of 3.35 mm in diameter, displays a large volume expansion ratio of 131% at the first hydrogen absorption cycle and 40–45% in the following four cycles. The stable compact bed, made of alloy powders, organic silicone gel, and graphite flakes, shows significantly smaller volume expansion ratio, which is 97% at the first cycle and 21% at the second cycle, and stabilizes at 13% in the following cycles. Also, the compact bed shows similar hydrogen absorption capacity, but faster absorption kinetics compared to the powder bed. |
|---|---|
| ISSN: | 2304-6740 |