How do flow batteries work?

K. Webb ESE 471 3 Flow Batteries Flow batteries are electrochemical cells, in which the reacting substances are stored in electrolyte solutions external to the battery cell Electrolytes are pumped through the cells Electrolytes flow across the electrodes Reactions occur atthe electrodes Electrodes do not undergo a physical change Source: EPRI

How do electrodes affect redox flow batteries?

Electrodes, which offer sites for mass transfer and redox reactions, play a crucial role in determining the energy efficiencies and power densities of redox flow batteries.

Can a battery electrode be a fluid state?

Inspired by this fundamental behavior, we demonstrate that by transferring the physical property of the battery electrode from a conventional solid to a fluid state, it provides us with an electrode design concept that relies on viscosity of a fluid rather than the Young’s modulus of a solid (Fig. 1C).

Does a battery electrode transfer physical property from a conventional solid to fluid?

Here, we present a concept that transfers the physical property of a battery electrode from a conventional solid into a fluid state. The mechanical and electrochemical properties of the electrode rely on the viscosity of fluids rather than Young’s modulus of solids.

Can fluids be used as active electrodes in stretchable batteries?

As compared to the handful of reports (Fig. 1G and table S1) that uses fluids as active electrodes in stretchable batteries, our fluid concept enables better mechanical robustness and uses a sustainable conjugated polymer redox couple system (particularly the lignin cathode).

Why do redox-active electrofluid batteries have a lower volumetric capacity?

Furthermore, thicker electrodes tend to have higher electrical resistance and tortuosity that hinder electrical and ion transport, limiting access to the active species in the solid electrode, resulting in a lower effective volumetric capacity (11, 12). Fig. 1. Redox-active electrofluid stretchable battery concept.