About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Functional Nanomaterials: Functional Low-Dimensional (0D, 1D, 2D) Materials 2022
|
| Presentation Title |
Freeze Casting of Graphene Aerogel Structures with Unidirectional Pores |
| Author(s) |
Yu-Kai Weng, Seungha Shin, Kenneth David Kihm, Douglas S Aaron, Mohammad Bahzad, Mian Umar Saeed |
| On-Site Speaker (Planned) |
Seungha Shin |
| Abstract Scope |
We studied the synthesis of directionally porous graphene aerogel (D-GA) structure, which is promising as an electrode material to overcome major technical barriers in organic electrochemical systems: poor ionic conductivity and mass transport. For the creation of unidirectional pores, we employed freeze casting under various synthesis conditions such as temperature gradient. Thermal, electrical, and physical properties (including pore size and alignment) of the synthesized graphene aerogels were evaluated. For more comprehensive understanding of graphene aerogel synthesis using freeze casting, water-ice phase change and graphene structuring processes were computationally investigated via atomistic molecular dynamics and macroscale finite volume method simulations. Through the computational study, we presented the control of water-ice freezing propagation, effects of graphene-water interaction on freezing, and Benard cell convection behavior during water-ice phase change for graphene structuring. Therefore, this research enhances fundamental understanding of freeze casting processes and suggests an effective synthesis process of 3D graphene electrode structure. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Shaping and Forming, Computational Materials Science & Engineering |