Upscaling of chemo-mechanical properties of battery electrode material

A variationally consistent model-based computational homogenization approach for transient chemo- mechanically coupled problems is developed based on the classical assumption of first order prolongation of the displacement and chemical potential fields within a Representative Volume Element (RVE). An upscaling procedure is introduced that is based on the assumption of micro-stationarity for the RVE problem. This is motivated by sufficient separation of time-scales. Periodic boundary conditions on the pertinent fields provide the general variational setting for the uniquely solvable RVE-problems. Due to the assumed linearity and micro-stationary, it is possible to use the pertinent sensitivity analysis for the RVE in order to derive effective macro-scale properties in closed form: the elastic stiffness, the insertion strain tensor and the mobility tensor. Statistically representative results are obtained by considering a sufficient number of RVE-realizations with varying volume fractions of the constituents. With the application to structural batteries in mind, a numerical study is conducted for a three-phase RVE microstructure representing a battery electrode material.

Larsson, Fredrik,1975Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)lafr (författare)
Runesson, Kenneth,1948Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)keru (författare)
Janicke, R.Technische Universität Braunschweig (författare)
Technische Universität BraunschweigChalmers tekniska högskola (creator_code:org_t)

Av författaren/redakt...: Rollin, D. R.; Larsson, Fredrik ...; Runesson, Kennet ...; Janicke, R.

Om ämnet

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Maskinteknik; och Energiteknik

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Materialteknik; och Annan materialte ...

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