Non-solvent induced phase separation (NIPS) is used to develop electrode synthesis-structure-performance relationships, and select samples are incorporated in redox flow batteries (RFBs) which exhibit high power density.
Significance and Impact
In this work, we tailor electrode microstructure by systematically varying the polymer concentration, bath temperature, and solvent type in the NIPS synthesis process. By deterministically tuning electrode properties, we identify samples best suited for RFBs. Improved cell power performance is observed with NIPS-based electrodes as compared to conventional fiber-based electrodes.
- NIPS was used to generate electrodes with seven unique microstructures based on changes in polymer concentration, bath temperature, and solvent type.
- The phase separation dynamics of polymer blends were investigated using cloud-point and viscosity measurements
- Permeability and surface measurements were coupled with flow cell testing in aqueous iron and vanadium electrolytes
- Elevated bath temperature enabled high-surface-area NIPS-based electrodes for high-power-density all-vanadium RFBs