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000891042 1001_ $$0P:(DE-Juel1)129641$$aMücke, Robert$$b0$$eCorresponding author$$ufzj
000891042 245__ $$aModelling electro-chemical induced stresses in all-solid-state batteries: Anisotropy effects in cathodes and cell design optimisation
000891042 260__ $$aNew York, NY [u.a.]$$bElsevier$$c2021
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000891042 520__ $$aAll-solid-state lithium batteries offer promising advantages in energy density and safety compared to conven­tional lithium ion batteries. However, the majority of this type of batteries suffers from a low cycling stability, which might originate from mechanical fatigue caused by mechanical stresses and strains in the rigid structure. We introduce a general approach to model and analyse the stresses in rigid cathode/electrolyte electrodes on a cell level, which enables to develop optimised cell designs with an improved mechanical stability. We apply this approach on composite cathodes with a Li7La3Zr2O12 (LLZO) ceramic electrolyte and LiCoO2 (LCO) active ma­terial. Using the 3D microstructure of a real cathode, the stresses inside a free-standing electrode and model cells with a thin and a thick LLZO separator are calculated for the charging cycle considering isotropic and anisotropic material properties of LCO as well as non-textured and textured crystallographic alignment. Compared to randomly oriented crystals, the textured crystallographic alignment of LCO grains, introduced by the manufacturing process, has a significant effect and yields considerably better stress distributions in all cell configurations investigated. The design of optimised all-solid-state cells with reduced separator thickness leads to a significantly more favourable stress state than a typical lab scale separator-supported cell.
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000891042 7001_ $$0P:(DE-Juel1)145623$$aFinsterbusch, Martin$$b1$$ufzj
000891042 7001_ $$0P:(DE-Juel1)174502$$aKaghazchi, Payam$$b2$$ufzj
000891042 7001_ $$0P:(DE-Juel1)171780$$aFattakhova-Rohlfing, Dina$$b3
000891042 7001_ $$0P:(DE-Juel1)161591$$aGuillon, Olivier$$b4$$ufzj
000891042 773__ $$0PERI:(DE-600)1491915-1$$a10.1016/j.jpowsour.2020.229430$$gVol. 489, p. 229430 -$$p229430$$tJournal of power sources$$v489$$x0378-7753$$y2021
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