scholarly journals Study of Tetraethylammonium bis(trifluoromethylsulfonyl)imide as a Supporting Electrolyte for an All-organic Redox Flow Battery Using Benzophenone and 1,4-di-tert-butyl-2,5-dimethoxybenzene as Active Species

2018 ◽  
pp. 6676-6683 ◽  
Author(s):  
Xiang Wang ◽  
Keyword(s):  
Supporting Electrolyte ◽  
Active Species ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Tert Butyl

scholarly journals Realization of an Asymmetric Non‐Aqueous Redox Flow Battery through Molecular Design to Minimize Active Species Crossover and Decomposition

2020 ◽  
Vol 26 (24) ◽  
pp. 5369-5373 ◽  
Author(s):  
Anuska Shrestha ◽  
Koen H. Hendriks ◽  
Mathew S. Sigman ◽  
Shelley D. Minteer ◽  
Melanie S. Sanford
Keyword(s):  
Molecular Design ◽  
Active Species ◽  
Redox Flow Battery ◽  
Flow Battery

scholarly journals Thermo-Electrochemical Redox Flow Battery for Continuous Conversion of Low-Grade Waste Heat to Power

2022 ◽  
Author(s):  
Jorrit Bleeker ◽  
Stijn Reichert ◽  
Joost Veerman ◽  
David Vermaas
Keyword(s):  
Seebeck Coefficient ◽  
Waste Heat ◽  
Active Species ◽  
Stable Operation ◽  
Low Grade ◽  
Redox Potentials ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Ohmic Resistance ◽  
Heat Recuperation

Abstract Here we assess the route to convert low grade waste heat (<100°C) into electricity by leveraging the temperature dependency of redox potentials (Seebeck effect). We use fluid-based redox-active species, which can be easily heated and cooled using heat exchangers. By using a first principles approach, we designed a redox flow battery system with Fe(CN)63−/Fe(CN)64− and I−/I3− chemistry. We evaluate the continuous operation with one flow cell at high temperature and one at low temperature. We show that the most sensitive parameter, the Seebeck coefficient, can be controlled via the redox chemistry, the reaction quotient and solvent additives, and we present the highest Seebeck coefficient for this RFB chemistry. A power density of 0.6 W/m2 and stable operation for 2 hours are achieved experimentally. We predict high (close to Carnot) heat-to-power efficiencies if challenges in the heat recuperation and Ohmic resistance are overcome, and the Seebeck coefficient is further increased.

A Benchmarking Approach for Routine Determination of Flow Battery Kinetics

2018 ◽  
Author(s):  
Tejal Sawant ◽  
James McKone
Keyword(s):  
Supporting Electrolyte ◽  
Rotating Disk ◽  
Reaction Rates ◽  
Electron Transfer Reaction ◽  
Rotating Disk Electrode ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Considerable Effort ◽  
Rotating Disk Electrode Voltammetry

This work focusses on improved precision and reproducibility in the study of redox flow battery (RFB) kinetics. We measured the electron-transfer reaction rates of the Fe(III/II) redox couple at polycrystalline Pt and Au electrodes in aqueous HCl supporting electrolyte using rotating disk electrode voltammetry. We made considerable effort to implement a systematic electrode preparation protocol, which was necessary for reproducibility. We found the reaction to be quasi-reversible at both electrodes and Pt to be a slightly more effective catalyst than Au. We further discuss some of the benefits and challenges of applying classical electroanalysis to RFB device design.

High Energy Density Hydrogen/Vanadium Hybrid Redox Flow Battery Utilizing HCl As a Supporting Electrolyte

2020 ◽  
Vol MA2020-02 (4) ◽  
pp. 800-800
Author(s):  
Andres Parra-Puerto ◽  
Javier Rubio-Garcia ◽  
Junyi Cui ◽  
Anthony Kucernak
Keyword(s):  
Energy Density ◽  
Supporting Electrolyte ◽  
High Energy ◽  
High Energy Density ◽  
Redox Flow Battery ◽  
Flow Battery

Nitroso-R-Salt in Aqueous Solutions for Redox Flow Battery Application

2011 ◽  
Vol 239-242 ◽  
pp. 2813-2816 ◽  
Author(s):  
Zhi Peng Xie ◽  
Feng Jiao Xiong ◽  
De Bi Zhou
Keyword(s):  
Aqueous Solutions ◽  
Alkaline Solution ◽  
Electrochemical Behavior ◽  
Electrode Reaction ◽  
Active Species ◽  
Electrode Kinetics ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Diffusion Controlled ◽  
Battery Application

The electrochemical behavior of Nitroso-R-salt (NRS) in aqueous solutions and the influence of pH are investigated. In alkaline solution, the electrode reaction of NRS exhibits stagnant electrode kinetics. With rising acid concentration, it exhibits more and more fast electrode kinetics and a diffusion-controlled process. Thus, acidic aqueous solutions are favorable for the NRS as active species of a redox flow battery (RFB). Average coulombic and energy efficiencies of the NRS/Zn RFB are 93.2 and 80.6%, respectively, showing that self-discharge is small. The preliminary exploration shows that the NRS is electrochemically promising for RFB application.

scholarly journals Effects of active species transport on current density distribution and performance in redox flow battery

2017 ◽  
Vol 83 (849) ◽  
pp. 16-00458-16-00458 ◽  
Author(s):  
Yutaka TABE ◽  
Masamichi UCHIYAMA ◽  
Ryo SHIMADA ◽  
Kengo SUZUKI ◽  
Takemi CHIKAHISA
Keyword(s):  
Density Distribution ◽  
Current Density ◽  
Current Density Distribution ◽  
Active Species ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Species Transport ◽  
And Performance

scholarly journals Cerium/Ascorbic Acid/Iodine Active Species for Redox Flow Energy Storage Battery

Molecules ◽  
2021 ◽  
Vol 26 (11) ◽  
pp. 3443
Author(s):  
Tzu-Chin Chang ◽  
Yu-Hsuan Liu ◽  
Mei-Ling Chen ◽  
Chen-Chen Tseng ◽  
Yung-Sheng Lin ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Composite Electrode ◽  
Active Species ◽  
Ion Pair ◽  
Vanadium Redox Flow Battery ◽  
Carbon Paper ◽  
Nitrate Hexahydrate ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Oxidation Reduction

In this study, we developed a novel cerium/ascorbic acid/iodine active species to design a redox flow battery (RFB), in which the cerium nitrate hexahydrate [Ce(NO3)3·6H2O] was used as a positive Ce3+/Ce4+ ion pair, and the potassium iodate (KIO3) containing ascorbic acid was used as a negative I2/I− ion pair. In order to improve the electrochemical activity and to avoid cross-contamination of the redox pair ions, the electroless plating and sol–gel method were applied to modify the carbon paper electrode and the Nafion 117 membrane. The electrocatalytic and electrochemical properties of the composite electrode using methanesulfonic acid as a supporting electrolyte were assessed using the cyclic voltammetry (CV) test. The results showed that the Ce (III)/Ce (IV) active species presented a symmetric oxidation/reduction current ratio (1.09) on the C–TiO2–PdO composite electrode. Adding a constant amount of ascorbic acid to the iodine solution led to a good reversible oxidation/reduction reaction. Therefore, a novel Ce/ascorbic acid/I RFB was developed with C–TiO2–PdO composite electrodes and modified Nafion 117–SiO2–SO3H membrane using the staggered-type flow channel, of which the energy efficiency (EE%) can reach about 72%. The Ce/ascorbic acid/I active species can greatly reduce the electrolyte cost compared to the all-vanadium redox flow battery system, and it therefore has greater development potential.

An optimistic approach on flow rate and supporting electrolyte for enhancing the performance characteristics of Zn-Br2 redox flow battery

2021 ◽  
pp. 138451
Author(s):  
Ramakrishnan Velmurugan Adith ◽  
Raghu pandiyan Naresh ◽  
Karuppusamy Mariyappan ◽  
Mani Ulaganathan ◽  
Pitchai Ragupathy
Keyword(s):  
Flow Rate ◽  
Supporting Electrolyte ◽  
Performance Characteristics ◽  
Redox Flow Battery ◽  
Flow Battery
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