- AutorIn
- Stefan Kaessmair
- Paul Steinmann
- Titel
- Multiscale modeling of diffusion in elastic composite materials
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:15-qucosa2-383736
- Quellenangabe
- Diffusion fundamentals - 32
Erscheinungsjahr: 2019
Jahrgang: 32
Artikelnummer: 34 - Erstveröffentlichung
- 2019
- Abstract (EN)
- Our research features diffusion in elastically deformable solids with complex microstructure. A prominent example are electrodes of Li-ion batteries which are typically a porous compound consisting of a binder, conductive particles, and active particles, filled with an electrolyte. The charge and discharge processes are complex multi-physics problems. Based on the used materials, they may include chemical reactions, electrochemically driven diffusion, separation into lithium poor and lithium rich regions in the active particles, or swelling phenomena [1]. Here, we consider a simplified version of this problem restricting ourselves to diffusion in an elastic matrix-particle composite. In the matrix, the transport of the mobile species is described using a Fickian-type flux driven by the gradient of the chemical potential. In the particles, the mobile species tends to accumulate and build separate regions of equal concentration – either high or low. This behavior is modeled using the Cahn-Hilliard equation.
- Freie Schlagwörter (EN)
- diffusion, elastic composite materials
- Klassifikation (DDC)
- 530
- Version / Begutachtungsstatus
- angenommene Version / Postprint / Autorenversion
- URN Qucosa
- urn:nbn:de:bsz:15-qucosa2-383736
- Veröffentlichungsdatum Qucosa
- 13.02.2020
- Dokumenttyp
- Artikel
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis