Ion migration in flow batteries

4 FAQs about [Ion migration in flow batteries]

What are examples of ionic migration?

Many energy-related materials rely on ionic migration for their function. Examples include the flow of ions in battery or fuel cell electrolytes or the coupled flow of ions and electrons in electrodes and membrane materials. As such, understanding, controlling, and improving ionic migration is a major focus of modern materials science.

Can redox flow battery separators improve ion transport?

Selectively tuning ion transport through redox flow battery separators is a promising approach toward increasing cell capacity, power density, and, ultimately, economic feasibility. However, this process is complex with numerous forces and coupled molecular interactions driving and impacting transport under different operating regimes.

What is ion transport in flow-battery separators?

A fundamental description of ion transport in flow-battery separators can guide the development of new separators by identifying the nature of ion selectivity under given conditions.

What drives ion transport through RFB membranes?

Ion transport through RFB membranes is driven by diffusion, convection, and migration . The diffusive flux is characterized by membrane permeability at zero current . Migration occurs under an applied current that drives active ions in a particular direction, which flow in opposing or allied directions of diffusive flux .

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