As redox active macromolecules are introduced to the materials repertoire of redox flow batteries (RFBs), nanoporous membranes, such as polymers of intrinsic microporosity (PIMs), are emerging as a viable separation strategy. Although their selectivity has been demonstrated, PIM-based membranes suffer from time-dependent resistance rise in nonaqueous electrolytes. Here, we study this phenomenon as a function of membrane thickness, electrolyte flow rate, and solvent washing using a diagnostic flow cell configuration. We find that the rate and magnitude of resistance rise can be significantly reduced through the combination of low electrolyte flow rate and solvent prewash. Further, our results indicate that, since the increase is not associated with irreversible chemical and structural changes, the membrane performance can be recovered via ex-situ or in-situ solvent washes.
Licoccia, Silvia (Corresponding)
|Data di pubblicazione:||2019|
|Titolo:||Investigating the factors that influence resistance rise of PIM-1 membranes in nonaqueous electrolytes|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.elecom.2019.106530|
|Appare nelle tipologie:||2.1 Articolo su rivista |
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|PP_M.Gigli (2019 - Electrochemistry Communications) - Investigating the factors that influence resistance rise of PIM-1 membranes in nonaqueous electrolytes.pdf||Articolo principale||Documento in Post-print||Accesso chiuso-personale||Riservato|