Oriented Proton-Conductive Nanochannels Boosting a Highly Conductive Proton-Exchange Membrane for a Vanadium Redox Flow Battery

2021 ◽  
Vol 13 (3) ◽  
pp. 4051-4061
Author(s):  
Denghua Zhang ◽  
Zeyu Xu ◽  
Xihao Zhang ◽  
Lina Zhao ◽  
Yingying Zhao ◽  
...  
Keyword(s):  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Exchange Membrane ◽  
Vanadium Redox

SPES/PVDF/TPA composite membrane as an alternative proton exchange membrane in vanadium redox flow battery application

2017 ◽  
Vol 30 (3) ◽  
pp. 312-317 ◽  
Author(s):  
Xiaojuan Lian ◽  
Xin Yang ◽  
Hongdong Liu ◽  
Haitao Liu ◽  
Jiang Zhu
Keyword(s):  
Ion Exchange ◽  
Single Cell ◽  
Composite Membrane ◽  
Proton Exchange ◽  
Ion Exchange Membrane ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Exchange Membrane ◽  
Vanadium Redox

A new kind of composite membrane consisting of sulfonated poly(ether sulfone) (SPES), poly(vinylidene fluoride) (PVDF), and phosphotungstic acid (TPA) has been prepared and employed as the ion-exchange membrane for vanadium redox flow battery (VRB) application. The addition of the highly crystalline and hydrophobic PVDF effectively confines the swelling behavior of SPES/PVDF/TPA. The composite membrane exhibits one order of magnitude lower vanadium ions permeability and much better single cell performance compared to pristine SPES and Nafion 115 membranes. The single cell with SPES/PVDF/TPA membrane shows much lower capacity loss, higher coulombic efficiency (>97%), and higher energy efficiency (>82%) than which with Nafion 115 membrane. In the self-discharge test, single cell with SPES/PVDF/TPA membrane shows much longer duration in the open-circuit voltage decay than which with Nafion 115 membrane. With all the good performances and low cost, the SPES/PVDF/TPA membrane is expected to have excellent commercial prospects as ion-exchange membrane for VRB system.

An improved proton conductivity and structure stability of SPEEK/SPPS blend membranes for vanadium redox flow battery

2021 ◽  
Author(s):  
Penghua Qian ◽  
Yunhu Jiang ◽  
Haixia Wang ◽  
Lei Zhang ◽  
Haifeng Shi
Keyword(s):  
Proton Conductivity ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Polyphenylene Sulfide ◽  
Vanadium Redox Flow Battery ◽  
Structure Stability ◽  
Redox Flow Battery ◽  
High Proton ◽  
Exchange Membrane ◽  
Vanadium Redox

The sulfonated polyphenylene sulfide (SPPS) containing a rigid main chain is introduced into the SPEEK-based proton exchange membrane to approach the high proton conductivity and dimensional stability. Under the varied...

scholarly journals Novel Anion Exchange Membrane Based on Poly(Pentafluorostyrene) Substituted with Mercaptotetrazole Pendant Groups and Its Blend with Polybenzimidazole for Vanadium Redox Flow Battery Applications

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 915
Author(s):  
Hyeongrae Cho ◽  
Vladimir Atanasov ◽  
Henning M. Krieg ◽  
Jochen A. Kerres
Keyword(s):  
Anion Exchange ◽  
Open Circuit ◽  
Vanadium Redox Flow Battery ◽  
Anion Exchange Membranes ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Blend Membranes ◽  
Performance Results ◽  
Exchange Membrane ◽  
Vanadium Redox

In order to evaluate the performance of the anion exchange membranes in a vanadium redox flow battery, a novel anion exchange polymer was synthesized via a three step process. Firstly, 1-(2-dimethylaminoethyl)-5-mercaptotetrazole was grafted onto poly(pentafluorostyrene) by nucleophilic F/S exchange. Secondly, the tertiary amino groups were quaternized by using iodomethane to provide anion exchange sites. Finally, the synthesized polymer was blended with polybenzimidazole to be applied in vanadium redox flow battery. The blend membranes exhibited better single cell battery performance in terms of efficiencies, open circuit voltage test and charge-discharge cycling test than that of a Nafion 212 membrane. The battery performance results of synthesized blend membranes suggest that those novel anion exchange membranes are promising candidates for vanadium redox flow batteries.

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