scholarly journals Real-Time Monitoring of the Thermal Effect for the Redox Flow Battery by an Infrared Thermal Imaging Technology

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6717
Author(s):  
Shu-Ling Huang ◽  
Chi-Ping Li ◽  
Chia-Chin Chang ◽  
Chen-Chen Tseng ◽  
Ming-Wei Wang ◽  
...  
Keyword(s):  
Thermal Effect ◽  
Thermal Imaging ◽  
Exchange Capacity ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Monitoring Method ◽  
Infrared Thermal Imaging ◽  
Imaging Technology ◽  
Charge Discharge

In this study, a new monitoring method was developed, titled infrared thermal imaging technology, which can effectively evaluate the thermal effect of the charge-discharge test in the vanadium/iodine redox flow battery (V/I RFB). The results show that the all-vanadium redox flow battery (all-V RFB) has a greater molar reaction Gibbs free energy change than that of the V/I RFB, representing a large thermal effect of the all-V RFB than the V/I RFB. The charge-discharge parameters, flow rate and current density, are important factors for inducing the thermal effect, because of the concentration polarization and the ohmic resistor. The new membrane (HS-SO3H) shows a high ion exchange capacity and a good ions crossover inhibitory for the V/I RFB system, and has a high coulomb efficiency that reaches 96%. The voltage efficiency was enhanced from 61% to 86% using the C-TiO2-Pd composite electrode as a cathode with the serpentine-type flow field for the V/I RFB. By adopting the high-resolution images of an infrared thermal imaging technology with the function of the temperature profile data, it is useful to evaluate the key components’ performance of the V/I RFB, and is a favorable candidate in the developing of the redox flow battery system.

scholarly journals Thin Reinforced Ion-Exchange Membranes Containing Fluorine Moiety for All-Vanadium Redox Flow Battery

Membranes ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 867
Author(s):  
Ha-Neul Moon ◽  
Hyeon-Bee Song ◽  
Moon-Sung Kang
Keyword(s):  
Ion Exchange ◽  
Cation Exchange ◽  
Electrical Resistance ◽  
Vanadium Redox Flow Battery ◽  
Ion Exchange Membranes ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Exchange Membrane ◽  
Vanadium Redox ◽  
Charge Discharge

In this work, we developed pore-filled ion-exchange membranes (PFIEMs) fabricated for the application to an all-vanadium redox flow battery (VRFB) by filling a hydrocarbon-based ionomer containing a fluorine moiety into the pores of a porous polyethylene (PE) substrate having excellent physical and chemical stabilities. The prepared PFIEMs were shown to possess superior tensile strength (i.e., 136.6 MPa for anion-exchange membrane; 129.9 MPa for cation-exchange membrane) and lower electrical resistance compared with commercial membranes by employing a thin porous PE substrate as a reinforcing material. In addition, by introducing a fluorine moiety into the filling ionomer along with the use of the porous PE substrate, the oxidation stability of the PFIEMs could be greatly improved, and the permeability of vanadium ions could also be significantly reduced. As a result of the evaluation of the charge–discharge performance in the VRFB, it was revealed that the higher the fluorine content in the PFIEMs was, the higher the current efficiency was. Moreover, the voltage efficiency of the PFIEMs was shown to be higher than those of the commercial membranes due to the lower electrical resistance. Consequently, both of the pore-filled anion- and cation-exchange membranes showed superior charge–discharge performances in the VRFB compared with those of hydrocarbon-based commercial membranes.

Preparation and Properties of Sulfonated Polyimide Proton Conductive Membrane for Vanadium Redox Flow Battery

2011 ◽  
Vol 239-242 ◽  
pp. 2779-2784 ◽  
Author(s):  
Ming Zhu Yue ◽  
Ya Ping Zhang ◽  
Yan Chen
Keyword(s):  
Exchange Capacity ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Chemical Structures ◽  
Sulfonated Polyimide ◽  
Sulfonated Polyimides ◽  
Ft Ir ◽  
Vanadium Redox ◽  
Vanadium Ion

A series of sulfonated polyimides (SPIs) were synthesized by 1,4,5,8-naphthalene tetracarboxylic dianhydride (NTDA), 2,2′-benzidinedisulfonic acid (BDSA) and 4,4′- diaminodiphenyl ether (ODA) in m-cresol. The sulfonation degree of SPI was controlled through the ratio of sulfonated diamine to the non-sulfonated diamine, and the SPI membranes were prepared by a casting method. The chemical structures of SPI membranes were characterized by FT-IR. The properties of obtained SPI membranes were investigated, such as water uptake, ion exchange capacity, proton conductivity and permeability of vanadium ion. The proton conductivities of SPI membranes are ranged from 0.012 to 0.051 S/cm, and the permeabilities of vanadium ion are one or two orders of magnitude less than that of Nafion®117 (1.80×10-6cm2/min ). Experimental results showed that SPI membranes are potential candidates for vanadium redox flow battery.

Preparation and Properties of Poly (phthalazinone Ether Ketone) Based Anion Exchange Membranes for Vanadium Redox Flow Battery

2013 ◽  
Vol 773 ◽  
pp. 171-174
Author(s):  
Shou Hai Zhang ◽  
Ben Gui Zhang ◽  
Xi Gao Jian
Keyword(s):  
Ion Exchange ◽  
Anion Exchange ◽  
Exchange Capacity ◽  
Vanadium Redox Flow Battery ◽  
Anion Exchange Membranes ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Ion Exchange Capacity ◽  
Ether Ketone ◽  
Vanadium Redox

Poly (phthalazinone ether ketone) anion exchange membranes with pyridinium groups (PyPPEK) for vanadium redox flow battery were prepared from chloromethylated poly (phthalazinone ether ketone) and pyridine. The chemical structure of PyPPEK was characterized by using FT-IR spectrum. Compared with quaternary ammonium group containing poly (phthalazinone ether ketone), PyPPEK membrane showed low ion exchange capacity, low swelling ratio and comparable tensile strength. Columbic efficiencies of VRB with anion exchange membranes were higher than that of VRB with Nafion117 membrane. When the ion exchange capacity of PyPPEK membrane was 1.40 mmol·g-1, energy efficiency of VRB with the membrane was higher than that of VRB with Nafion117 membrane at charge-discharge current densities ranging from 20 mA·cm-2 to 50 mA·cm-2.

Zirconium boride as a novel negative catalyst for vanadium redox flow battery

2021 ◽  
Author(s):  
Tongxue Zhang ◽  
Yingqiao Jiang ◽  
Zixuan Zhang ◽  
Jing Xue ◽  
Yuehua Li ◽  
...  
Keyword(s):  
Vanadium Redox Flow Battery ◽  
Zirconium Boride ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Vanadium Redox
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