Upscaling of chemo-mechanical properties of battery electrode material

Larsson, Fredrik, 1975 (author): Chalmers tekniska högskola,Chalmers University of Technology

Runesson, Kenneth, 1948 (author): Chalmers tekniska högskola,Chalmers University of Technology

(creator_code:org_t)

Related links:: https://doi.org/10.1...; show more...; https://research.cha...; show less...

Abstract Subject headings

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.

TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Energiteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Energy Engineering (hsv//eng)
NATURVETENSKAP -- Matematik -- Beräkningsmatematik (hsv//swe)
NATURAL SCIENCES -- Mathematics -- Computational Mathematics (hsv//eng)
TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)

By the author/editor: Rollin, D. R.; Larsson, Fredrik ...; Runesson, Kennet ...; Janicke, R.

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Energy Engineeri ...

NATURAL SCIENCES: NATURAL SCIENCES; and Mathematics; and Computational Ma ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Other Materials ...

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