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Showing 1 to 7 of 7 for “"Chemical Expansion"”.
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Chemomechanics of non-stoichiometric oxide films for energy conversion
Electrochemical energy conversion and storage devices including solid oxide fuel cells (SOFCs) and lithium ion batteries (LIBs) are enabled by materials known as "non-stoichiometric oxides" that contain large concentrations of point defects such as oxygen or lithium vacancies. While this …
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Electrochemomechanics in Mixed Ionic Electronic Conductors and solid oxide cells
… distribution in the conductor arising from the chemical expansion associated with the defects. First, a finite element formulation of the model is developed and validated with various analytical solutions and comparisons with experimental results. In the third chapter the coupled model is used …
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Charged-defect transport induced stress in mixed ionic-electronic conducting ceramic membranes
… the stresses that develop on account of chemical expansion are determined using one-dimensional, analytic stress solutions for planar and tubular membranes. The electrochemical and stress analyses are then extended to 2-D, where the NPP and elasticity equations are solved in an …
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Chemo-elastic behavior of reconstructed Li-ion battery cathode particles with phase transformation: a numerical and analytical investigation
… and size; and v) composition-dependent chemical-expansion coefficient, [beta]. Diffusion-induced stresses (DIS) can be quite extreme with increasing particle size, Li concentration and discharge rate. Peaks of DIS locally emerge in the vicinity of concave features and protuberances of …
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Electro-chemo-mechanics of solids: application to all-solid-state batteries, polyelectrolyte gels, and actuators.
… systems, including batteries and various electrochemically-based actuators, charged ions are transported across a solid host material under the influence of electric fields and concentration gradients, which can cause local volumetric expansion and contraction. Since stresses and strains are …
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Electro-chemo-mechanical Studies of Perovskite-Structured Mixed Ionic-Electronic Conducting SrSni-₁₋xFexO₃₋x/₂₊[epsilon]
… and ultimately electrode performance. Bulk chemical expansion was measured by dilatometry as a function of oxygen partial pressure while surface kinetics were examined by means of AC impedance spectroscopy. The electrochemo- mechanical properties of SSF were found not to differ significantly …
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Crystal chemical design rules for tailored chemical expansivity
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01