Sulfonated poly (ether ketone)/sulfonated titanium dioxide hybrid membrane with high selectivity and good stability for vanadium redox flow battery

2022 ◽  
Vol 45 ◽  
pp. 103705
Author(s):  
Lei Zhang ◽  
Yunhu Jiang ◽  
Haixia Wang ◽  
Penghua Qian ◽  
Jiaxuan Sheng ◽  
...  
2020 ◽  
Vol 20 (8) ◽  
pp. 4714-4721 ◽  
Author(s):  
Jiaye Ye ◽  
Chun Wu ◽  
Wei Qin ◽  
Fangfang Zhong ◽  
Mei Ding

The purpose of this study was to improve the repulsion ability of sulfonated poly(ether ether ketone) (SPEEK) membrane for the vanadium ions crossover. For this purpose graphene oxide (GO) nanosheet and titanium dioxide (TiO2) nanoparticles were employed into the polymer matrix to prepare SPEEK/GO/TiO2 hybrid membrane via solution-casting method for vanadium redox flow battery (VRFB). The morphology, permeability of vanadium ions and device performance of asprepared membrane were investigated and discussed. It was observed that with the barrier block effect by the filler, the VRFB single cell with the optimized SPEEK/GO/TiO2 hybrid membrane exhibited high coulombic efficiency (~99%), excellent energy efficiency (~85%) and vigorous cyclability (~97.2% capacity retention after 100 cycles). Moreover, the VRFB cell with this blend membrane showed lower vanadium ions permeability than Nafion 212 or pure SPEEK membranes. These results demonstrated that the comprehensive properties of hybrid membrane have been remarkably improved comparing to pristine SPEEK which suggested that the hybrid membrane was applicable for VRFB energy storage system.


2015 ◽  
Vol 3 (34) ◽  
pp. 17590-17597 ◽  
Author(s):  
Shuai Liu ◽  
Lihua Wang ◽  
Dan Li ◽  
Biqian Liu ◽  
Jianjun Wang ◽  
...  

For vanadium redox flow battery (VRB) applications, novel amphoteric ion exchange membranes (AIEMs) are prepared using sulfonated poly(ether ether ketone) (SPEEK) and quaternized poly(ether imide) (QAPEI) by a facile method.


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