Recent developments in sol-gel based polymer electrolyte membranes for vanadium redox flow batteries – A review

2020 ◽  
Vol 89 ◽  
pp. 106567
Author(s):  
Jaganathan Balaji ◽  
Mathur Gopalakrishnan Sethuraman ◽  
Sung-Hee Roh ◽  
Ho-Young Jung
Keyword(s):  
Polymer Electrolyte ◽  
Sol Gel ◽  
Polymer Electrolyte Membranes ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Electrolyte Membranes ◽  
Recent Developments ◽  
Vanadium Redox

Polymer Electrolyte Membranes for Vanadium Redox Flow Batteries: Fundamentals and Applications

2021 ◽  
Vol 85 ◽  
pp. 100926
Author(s):  
Xingyi Shi ◽  
Oladapo Christopher Esan ◽  
Xiaoyu Huo ◽  
Yining Ma ◽  
Zhefei Pan ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
Polymer Electrolyte Membranes ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Electrolyte Membranes ◽  
Vanadium Redox

Laboratory XANES to study vanadium species in vanadium redox flow batteries

2020 ◽  
Vol 35 (S1) ◽  
pp. S24-S28 ◽  
Author(s):  
Christian Lutz ◽  
Ursula Elisabeth Adriane Fittschen
Keyword(s):  
Large Scale ◽  
Polymer Electrolyte Membranes ◽  
Measurement Time ◽  
Edge Structure ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Electrolyte Membranes ◽  
X Ray Absorption ◽  
Vanadium Redox ◽  
Vanadium Species

The speciation of vanadium in the electrolyte of vanadium redox flow batteries (VRFBs) is important to determine the state of charge of the battery. To obtain a better understanding of the transport of the different vanadium species through the separator polymer electrolyte membranes, it is necessary to be able to determine concentration and species of the vanadium ions inside the nanoscopic water body of the membranes. The speciation of V in the electrolyte of VRFBs has been performed by others at the synchrotron by X-ray absorption near-edge structure analysis (XANES). However, the concentrations are quite high and not necessarily justify the use of a large-scale facility. Here, we show that vanadium species in the electrolyte and inside the ionomeric membranes can be determined by laboratory XANES. We were able to determine V species in the 1.6 M electrolyte with a measurement time of 2.3 h and V species having a concentration of 9.8 g kg−1 inside the membranes (178 µm thick) with a measurement time of 5 h. Our results show that laboratory XANES is an appropriate tool to study these kind of samples.

scholarly journals Polymer Electrolyte Membranes

Membranes ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 244
Author(s):  
Byungchan Bae ◽  
Dukjoon Kim
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membranes ◽  
Capacitive Deionization ◽  
Lithium Secondary Batteries ◽  
Energy Devices ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Electrolyte Membranes ◽  
Electrochemical Energy

Recently, polymer electrolyte membranes have been used in various electrochemical energy devices and other applications, such as fuel cells, lithium secondary batteries, redox flow batteries, electrodialysis, and membrane capacitive deionization [...]

scholarly journals A Review of Recent Developments and Advanced Applications of High-Temperature Polymer Electrolyte Membranes for PEM Fuel Cells

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5440 ◽  
Author(s):  
Khadijeh Hooshyari ◽  
Bahman Amini Horri ◽  
Hamid Abdoli ◽  
Mohsen Fallah Vostakola ◽  
Parvaneh Kakavand ◽  
...  
Keyword(s):  
Fuel Cells ◽  
High Temperature ◽  
Fuel Cell ◽  
Polymer Electrolyte ◽  
Pem Fuel Cells ◽  
Polymer Electrolyte Membranes ◽  
Cell Performance ◽  
Fuel Cell Performance ◽  
Electrolyte Membranes ◽  
Recent Developments

This review summarizes the current status, operating principles, and recent advances in high-temperature polymer electrolyte membranes (HT-PEMs), with a particular focus on the recent developments, technical challenges, and commercial prospects of the HT-PEM fuel cells. A detailed review of the most recent research activities has been covered by this work, with a major focus on the state-of-the-art concepts describing the proton conductivity and degradation mechanisms of HT-PEMs. In addition, the fuel cell performance and the lifetime of HT-PEM fuel cells as a function of operating conditions have been discussed. In addition, the review highlights the important outcomes found in the recent literature about the HT-PEM fuel cell. The main objectives of this review paper are as follows: (1) the latest development of the HT-PEMs, primarily based on polybenzimidazole membranes and (2) the latest development of the fuel cell performance and the lifetime of the HT-PEMs.

scholarly journals Synthesis of cross-linked comb-type polysiloxane for polymer electrolyte membranes

e-Polymers ◽  
2012 ◽  
Vol 12 (1) ◽  
Author(s):  
Omar Mukbaniani ◽  
Jimsher Aneli ◽  
Tamara Tatrishvili ◽  
Eliza Markarashvili ◽  
Maia Chigvinadze ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
Sol Gel ◽  
Gel Permeation Chromatography ◽  
Catalytic Amount ◽  
Polymer Electrolyte Membranes ◽  
Solid Polymer ◽  
Side Chain ◽  
Differential Scanning Calorimetric ◽  
Anion Receptors ◽  
Electrolyte Membranes

Abstract Hydrosilylation reaction of 2.4.6.8-tetrahydro-2.4.6.8-tetramethylcyclotetrasiloxane with allyl acetoacetate and vinyltriethoxysilane at 1:3:1 ratio of initial compounds in the presence of Karstedt’s catalyst (Pt2[(VinSiMe2)2O]3), platinum hydrochloric acid (0.1 M solution in THF) and platinum on the carbon have been studied and D4R,R’ type methylorganocyclotetrasiloxane has been obtained. Ring-opening co-polymerization reactions of methylorganocyclotetrasiloxane and hexamethyldisiloxane, in the presence of catalytic amount of powder-like potassium hydroxide, have been carried out and linear methylsiloxane oligomer with regular arrangement of propyl acetoacetate and triethoxysilane groups in the side chain has been obtained. The synthesized methylorganocyclotetrasiloxane and oligomers were studied by FTIR, 1H, 13C, 29Si NMR spectroscopy. Comb-type oligomers were characterized by gel-permeation chromatography, wide- angle X-ray and differential scanning calorimetric methods. Via sol-gel processes of doped with lithium trifluoromethylsulfonate (triflate) or lithium bis- (trifluoromethylsulfonyl)imide oligomer systems solid polymer electrolyte membranes have been obtained. The dependence of ionic conductivity as a function of temperature and salt concentration has been studied. The electrical conductivity of these materials at room temperature belongs to the range of 7x10-8 to 4x10-6 S cm-1 and depends on the structures of grafted anion receptors and the polymer backbones.

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