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 bimetallic thermally-regenerative ammonia-based flow battery for low-grade waste heat recovery

2019 ◽  
Vol 424 ◽  
pp. 184-192 ◽  
Author(s):  
Weiguang Wang ◽  
Gequn Shu ◽  
Hua Tian ◽  
Dongxing Huo ◽  
Xiuping Zhu
Keyword(s):  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Low Grade ◽  
Flow Battery

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

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.

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