.png){kind=icon}
.png){kind=icon}
Return
Porous Sulfonated N-Heterocyclic Poly(aryl ether ketone) Membranes for Vanadium Redox Flow Battery Application
.png){kind=icon}
PRE
AI
L
Q
P
Z
F
X
Z
X
张
蹇
DOI：10.1021/acsaem.6c00427.png)
.png){kind=icon}
Original request for help.png){kind=icon}
Share.png){kind=icon}
Save
Abstract
En 中文
The application of sulfonated poly(aryl ether)-based cation exchange membranes in vanadium redox flow batteries (VRFBs) faces a critical challenge of the trade-off effect on ion conductivity, selectivity, and oxidation resistance. A porous N-heterocyclic poly(aryl ether ketone) incorporating bis-phthalazinone and low-substituted benzenesulfonic group (SPBPEK-P) membrane is prepared by the non-solvent-induced phase separation (NIPS) process based on the coagulation of water. The regulation of the process endows the membranes with a dense skin layer and a porous bottom layer to optimize the equilibrium between ionic conduction and selectivity. All of the SPBPEK-P membranes exhibit sponge-like morphology, and the area resistance reduces to 0.16 Ω cm2 by the introduction of poly(ethylene glycol) (PEG). The regulation of butanone and evaporation time enhances the ion selectivity to obtain the vanadium ion permeability of 1.6 × 10−7 cm2 min−1. The SPBPEK-P-85 membrane prepared in the evaporation duration of 85 min achieves 81.3% energy efficiency (EE) at 200 mA cm−2, outperforming Nafion 212 (75.0%), and exerts good stability in 300 charge–discharge cycles at 180 mA cm−2. This work highlights the potential prospect of SPBPEK-P membranes in VRFBs and provides a process strategy for cation porous membranes.
Keywords:
Batteries
Fluoropolymers
Membranes
Redox reactions
Vanadium
sulfonated
N-heterocyclic poly(aryl ether ketone)
porous membrane
non-solvent-induced phase separation
vanadium redox flow battery
Journal
IF:
5.5
Papers:
1.1W
Citations:
4.5W
Organization
Cited Papers