Hybrid Fe Redox Flow Batteries
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Hybrid Fe Redox Flow Batteries: Theory and Experiments
The increasing use of renewable energy sources evokes the necessity of efficient long-term storage systems. Redox-flow-batteries can be a solution to this problem, as they can balance fluctuations in the electrical supply grid. The vanadium redox flow battery (VRFB) has been the focus of research, but the toxicity and scarcity of vanadium calls for a more sustainable alternative. In more recent years the all-Fe redox flow battery (IRFB) has (re)gained scientific attention, as iron is earth-abundant and harmless. However, in the all-Fe battery, iron plates in the metallic state, Fe0, are used on the negative electrode, which make an independent scaling of energy and power density impossible. Additionally, the parasitic hydrogen evolution reaction (HER) is favored at negative electrode potentials, which reduces the battery’s charging efficiency.
The goal of this joint project is to understand and improve the parameters leading to hydrogen evolution (HER) and inhomogeneous iron plating on the negative electrode. This will be done by coupling experiments and modelled simulations across various length scales related to either an improved interface, electrode, or system design.
Project Profile
Duration: 01.01.2024 - 31.12.2027
Funding: Deutsche Forschungsgemeinschaft (DFG)
Project Partners:
Contact: Alena Neudert, Prof. Dr.-Ing. Christina Roth