| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Functional Nanomaterials 2020: Translating Innovation into Pioneering Technologies
|
| Presentation Title |
Strain Induced Cyclic Phase Transitions in Fatigue-tolerant 2D Elastocaloric/thermoelastic Materials for Future Cooling and Refrigeration Technologies |
| Author(s) |
Zhewen Yin, Sankha Mukherjee, Yunjo Jeong, MdRubayat-E Tanjil, Chandra Veer Singh, Michael Cai Wang |
| On-Site Speaker (Planned) |
Zhewen Yin |
| Abstract Scope |
Solid-state based cooling and refrigeration technologies are slated to become energy efficient and environmentally friendly next generation replacements for conventional vapor-compression systems. We investigated the elastocaloric/thermoelastic effect of fatigue- and strain-tolerant, nanoscale 2D materials via strain-induced phase transitions. Prototypical transition metal chalcogenide MoTe2 is exfoliated from their stable bulk 2H phase crystals into atomically-thin 2D layers and strain-engineered via elastomeric-aided deformations. Computational results indicated that the 2H to 1T’ transition in MoTe2 involves an enthalpy change of up to 330 cal/mol. In-situ atomic force microscopy (AFM), scanning thermal microscopy (SThM), and Raman spectroscopy were used to characterize the mechanical and elastocaloric response of MoTe2. The experimental results were cross-validated with large-scale screening of potential 2D elastocaloric candidates via first-principles calculations and supervised machine learning models. These results will provide essential guidelines for the future design of novel, compact and ultra-efficient cooling and refrigeration systems. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |