This is part of a seminar series for students and researchers interested in theoretical physics and applied mathematics. Listen to Leif Asp (Chalmers) during the seminar "Coupled electro-chemo-mechanical processes in structural batteries".
Leif Asp (Chalmers)
Structural battery composites combine electrical energy storage and mechanical load carrying functions intrinsic to the material. Multifunctionality is realised employing carbon fibres as electrode material, current collector, and reinforcement, see Figure 1. To ensure mechanical load transfer between fibres and material layers a structural electrolyte matrix is used. The dual functionality of the electrolyte is realised using a bi-phasic material consisting of a porous glassy polymer where the pores are occupied by a liquid electrolyte. [1,2]
The multifunctional performance of the structural battery is governed by the coupled electro-chemo-mechanical processes occurring in the material. Here, charge and mass balances prevail in combination with momentum balance governing the internal stress state. Chemical strains resulting from change in lithium concentrations, e.g., from lithium insertion, affect the mechanical stress. The mechanical stress, in turn, affects the chemical potential. In this way, a two-way coupling between mechanical stress and electrical potential results. [3,4,5]
Here, the multiphysics of a structural battery composites will be described and evaluated. Coupled electro-chemo-mechanical processes will be analysed and compared to experimental data. For this purpose, effects of mechanical loads on electrical potential will be monitored. These tests are performed structural battery composites like those by Siraj et al. [1] and results are compared to numerical predictions using a multiscale, multiphysics computational model for the full cell.
References
1. Asp LE, et al. Adv. Energy Sustainability Res. 2021; 2(3):2000093.
2 Chaudhary R, Xu J, Xia Z, Asp LE. Adv Mat, 2024; 2409725.
3. Carlstedt D, Runesson K, Larsson F, Xu J, Asp LE. Multifunc Mater. 2020; 3:045002.
4. Carlstedt D, et al. Compos Sci Technol. 2022; 220:109283.
5. Larsson C, Larsson F, Xu J, Runesson K, Asp LE. Compos Sci Technol. 2023; 244:110299.
6. Asp et al. Funct. Compos. Struct. 2019; 1:042001
Participate on campus or via Zoom.
On campus: PJ Lecture Hall
Zoom link: https://gu-se.zoom.us/j/64681043702