The transition from an early stage, linear to a later stage, nonlinear aging behavior of lithium-ion cells significantly determines their economic and sustainable usage. The presented thesis investigates the linear and nonlinear aging behavior and the underlying degradation mechanisms based on laboratory experiments, electrochemical analysis and in-situ neutron diffraction. To describe the aging behavior, a physicochemical model is developed considering solid-electrolyte interphase re-/formation, lithium plating and lithium stripping side reactions.
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The transition from an early stage, linear to a later stage, nonlinear aging behavior of lithium-ion cells significantly determines their economic and sustainable usage. The presented thesis investigates the linear and nonlinear aging behavior and the underlying degradation mechanisms based on laboratory experiments, electrochemical analysis and in-situ neutron diffraction. To describe the aging behavior, a physicochemical model is developed considering solid-electrolyte interphase re-/formation...
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