( Invited ) Towards Design Principles for Redox-Mediated Flow Batteries

作者：Fikile R. Brushett, Nicholas J. Matteucci · 发表于：ECS Meeting Abstracts · 年份：2025 · DOI：10.1149/ma2025-014472mtgabs · 被引用次数：1 · 研究领域：Advanced battery technologies research

Redox-mediated flow batteries (RMFBs) are an emerging subfield of redox flow batteries (RFBs) that incorporate solid active materials into the external tanks, potentially offering an alternate cost-reduction pathway through increased energy density and inexpensive materials. In this storage concept, one or more soluble redox couples serve as mediators exchanging electrons with the “off-electrode” solid material. In recent years, a number of innovative proof-of-principle devices have been reported, highlighting the promise of these systems, but also hinting at the challenges of their design and operation. Indeed, the performance of these systems is governed by coupled reactive-transport processes which present complex (and transient) interdependencies that frustrate efficient navigation through the multi-dimensional design space. Here, we will present a mathematical modeling framework that uses traditional chemical engineering principles to describe redox-mediated electrochemical processes. Simulated electrochemical and fluid dynamic characteristics are compared to experimental observations reported in the literature. Subsequently, dimensionless groups will be derived that enable the generalization of model findings (e.g., scaling relationship and property tradeoffs), the exploration of unexpected phenomena, and the articulation of design criteria for existing and conceptual systems. Ultimately, we hope to provide the community with physical insights and computational tools to...