This study conducts an in-depth investigation into the impact of interdigitated flow channel structures within i-ron-based redox flow battery stacks on local non-uniformity of electrolyte concentration and the resulted concentration overpotential issues.While the interdigitated flow channel design has notably improved the overall concentration overpo-tential phenomenon,substantial concentration gradients persist in localized regions,thereby giving rise to considerable concentration overpotential problems that negatively affect overall performance of the stack.To further mitigate the influ-ence of these concentration gradients and enhance the stack's efficiency,this paper focuses on improving the variation in e-lectrolyte concentration distribution within the middle region of the stack as well as optimizing the design of end-plate structures.By employing electrochemical simulation analysis techniques,a series of improvement measures have been sys-tematically examined and optimized with the aim of achieving substantive enhancement and improvement in battery stack performance.
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