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Bringing Redox Flow Batteries to the Grid

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Bringing Redox Flow Batteries to the Grid ( bringing-redox-flow-batteries-grid )

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a) 10-11 10-12 10-13 0.2 0.4 0.6 0.8 1 Membrane conductivity (S/m) 0.48 0.46 0.44 0.42 0.4 0.38 0.36 b) 10-11 10-12 10-13 0.2 0.4 0.6 0.8 1 Membrane conductivity (S/m) 800 750 700 650 600 550 500 450 400 350 300 250 Figure VIII-3 – Color maps showing the fraction of theoretical capacity accessed upon equilibrium (a) and the system capital cost (at a 5.25 hour duration) when the system is sized to this equilibrated capacity (b) as a function of membrane conductivity (x-axis) and diffusivity of the active species through the membrane (y-axis). This is just one example of many analyses we are considering exploring with the combination of the TEA and 0D models. In addition to exploring more parameters (e.g., current density) and looking at more specific case studies (e.g., large organics with PIMs, membrane design for asymmetric chemistries, etc.), we also plan to explore different computational methods (e.g., machine learning) to facilitate more complex analyses. 119 Diffusivity of active species through the membrane (m2/s) Frac. of captheo that is accessed upon equil. Diffusivity of active species through the membrane (m2/s) Capital cost ($/kWh) at 5.25 h duration

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Bringing Redox Flow Batteries to the Grid

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