A High Voltage Organic Redox Flow Battery with Redox Couples O2/Tetrabutylammonium Complex and Tris(4-bromophenyl)amine as Redox Active Species

2018 ◽  
Vol 165 (11) ◽  
pp. A2696-A2702 ◽  
Author(s):  
Vasudevarao Pasala ◽  
Chinmaya Ramachandra ◽  
Sankararaman Sethuraman ◽  
Kothandaraman Ramanujam
Keyword(s):  
High Voltage ◽  
Active Species ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Redox Couples ◽  
Redox Active

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

All-PEGylated redox-active metal-free organic molecules in non-aqueous redox flow battery

2020 ◽  
Vol 8 (31) ◽  
pp. 15715-15724 ◽  
Author(s):  
Jingchao Chai ◽  
Amir Lashgari ◽  
Xiao Wang ◽  
Caroline K. Williams ◽  
Jianbing “Jimmy” Jiang
Keyword(s):  
Organic Molecules ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Active Materials ◽  
Metal Free ◽  
Redox Active ◽  
Active Metal ◽  
Molecular Sizes ◽  
The Stability ◽  
Redox Active Metal

A non-aqueous redox flow battery based on all-PEGylated, metal-free compounds is presented. The PEGylation enhances the stability of the redox-active materials, alleviating crossover by increasing the anolyte and catholyte species’ molecular sizes.

An electrochemically activated graphite electrode with excellent kinetics for electrode processes of V(ii)/V(iii) and V(iv)/V(v) couples in a vanadium redox flow battery

RSC Advances ◽  
2014 ◽  
Vol 4 (98) ◽  
pp. 55666-55670 ◽  
Author(s):  
Huijun Liu ◽  
Lingxu Yang ◽  
Qian Xu ◽  
Chuanwei Yan
Keyword(s):  
Functional Groups ◽  
Graphite Electrode ◽  
Electrochemical Activity ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Electrode Processes ◽  
Redox Couples ◽  
Vanadium Redox ◽  
Vanadium Ion

The electrochemical activity and the reversibility for electrode processes of vanadium ion redox couples are significantly enhanced on an EAGE, which is due to the functional groups of COOH and CO introduced on its surface.

scholarly journals Symmetric, Robust, and High-voltage Organic Redox Flow Battery Model Based on a Helical Carbenium Ion Electrolyte

2020 ◽  
Author(s):  
Jules Moutet ◽  
Jose M Veleta ◽  
thomas Gianetti
Keyword(s):  
Open Circuit Potential ◽  
Open Circuit ◽  
Kinetic Properties ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Capacity Retention ◽  
Battery Model ◽  
Redox Active ◽  
Carbenium Ion ◽  
Scale Integration

Redox flow batteries (RFBs) represent a promising technology for grid-scale integration of renewable energy. Redox-active molecular pairs with large potential windows have been identified as key components of these systems. However, cross-contamination problems encountered by the use of different catholyte and anolyte species still limits the development of reliable organic RFBs. Herein, we report the first use of a helical carbenium ion, with three stable oxidation states, as electrolyte for the development of symmetric cells. Cyclic voltammo-amperometric studies were conducted in acetonitrile to assess the essential kinetic properties for flow battery performance and cycling stability of this molecule. The selected [4]helicenium ion was then evaluated by using mono- and bi-electronic cycling experiments, resulting in 745 and 80 cycles respectively, with near-perfect capacity retention. This helical carbenium ion based electrolyte achieved a proof-of-principle 2.12 V open circuit potential as an all-organic symmetric RFB.<br>

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.

Functionalised carbazole as a cathode for high voltage non-aqueous organic redox flow batteries

2020 ◽  
Vol 44 (34) ◽  
pp. 14401-14410
Author(s):  
Chinmaya R. Mirle ◽  
Raja M. ◽  
Vasudevarao P. ◽  
Sankararaman S. ◽  
Kothandaraman R.
Keyword(s):  
High Voltage ◽  
Cathode Materials ◽  
Reduction Potential ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
High Reduction

Prospective high reduction potential cathode materials have been proposed that can be used in non-aqueous redox flow battery applications.

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