About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Materials for Energy Conversion and Storage 2026
|
| Presentation Title |
Chemomechanical characterization of V₂O₅ single crystals via nanoindentation and in situ lithiation |
| Author(s) |
Victor Hugo Balcorta, Rachel Lee, Arnab Maji, John Ponis, Aiden Kang, Sarbajit Banerjee, Matt Pharr |
| On-Site Speaker (Planned) |
Victor Hugo Balcorta |
| Abstract Scope |
Studying the anisotropic properties of battery materials is challenging in polycrystalline structures due to the presence of grain boundaries and random crystal orientations. Single crystals offer an ideal platform for investigating directional chemomechanical behaviors without interference from grain boundaries. This research explores the chemomechanical effects in V₂O₅ single crystals (alpha, zeta, and gamma phases) to analyze the relationship between mechanical properties and chemical changes during lithiation. Nanoindentation was used to characterize mechanical properties, including hardness, elastic modulus, and fracture toughness. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and focused ion beam (FIB) analyses revealed deformation-induced crystal reorientation and texture evolution during nanoindentation. In situ lithiation experiments enabled real-time optical microscopy and Raman spectroscopy to investigate the interactions between lithiation and previously deformed plastic deformation zones from nanoindentation. Post-lithiation characterization with SEM, TEM, and scanning transmission X-ray microscopy (STXM) provided detailed insights into these interactions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Energy Conversion and Storage, Characterization |