scholarly journals Fundamental properties of TEMPO-based catholytes for aqueous redox flow batteries: effects of substituent groups and electrolytes on electrochemical properties, solubilities and battery performance

RSC Advances ◽  
2020 ◽  
Vol 10 (37) ◽  
pp. 21839-21844 ◽  
Author(s):  
Wenbo Zhou ◽  
Wenjie Liu ◽  
Meng Qin ◽  
Zhidong Chen ◽  
Juan Xu ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Fundamental Properties ◽  
Redox Flow Batteries ◽  
Flow Batteries

The effects of substituent groups of TEMPO-based catholytes and supporting electrolytes on electrochemical properties, solubility and battery performance were examined systematically for aqueous redox flow batteries.

Quest for Organic Active Materials for Redox Flow Batteries: 2,3-Diaza-anthraquinones and Their Electrochemical Properties

2018 ◽  
Vol 30 (3) ◽  
pp. 762-774 ◽  
Author(s):  
Jonas D. Hofmann ◽  
Felix L. Pfanschilling ◽  
Nastaran Krawczyk ◽  
Peter Geigle ◽  
Longcheng Hong ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Active Materials ◽  
Redox Flow Batteries ◽  
Flow Batteries

Synthesis, characterization, and electrochemical properties of a first-row metal phthalocyanine series

2020 ◽  
Vol 49 (45) ◽  
pp. 16268-16277 ◽  
Author(s):  
Madeline Peterson ◽  
Camden Hunt ◽  
Zongheng Wang ◽  
Shannon E. Heinrich ◽  
Guang Wu ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Ligand Substitution ◽  
Charge Carriers ◽  
Metal Phthalocyanine ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Metal Ligand

A first-row metal phthalocyanine series is synthesized and the effects of axial metal-ligand substitution is investigated electrochemically and in the context of charge carriers for redox-flow batteries.

A Self-Trapping, Bipolar Viologen Bromide Electrolyte for Aqueous Redox Flow Batteries

2020 ◽  
Author(s):  
wenda wu ◽  
Jian Luo ◽  
Fang Wang ◽  
Bing Yuan ◽  
Tianbiao Liu
Keyword(s):  
Redox Flow Battery ◽  
Capacity Retention ◽  
Redox Flow Batteries ◽  
Redox Electrolyte ◽  
Charge Process ◽  
Self Trapping ◽  
Flow Batteries ◽  
Total Capacity ◽  
Neutral Conditions ◽  
Low Solubility

Aqueous organic redox flow batteries (AORFBs) have become increasing attractive for scalable energy storage. However, it remains challenging to develop high voltage, powerful AORFBs because of the lack of catholytes with high redox potential. Herein, we report methyl viologen dibromide (<b>[MV]Br<sub>2</sub></b>) as a facile self-trapping, bipolar redox electrolyte material for pH neutral redox flow battery applications. The formation of the <b>[MV](Br<sub>3</sub>)<sub>2</sub></b> complex was computationally predicted and experimentally confirmed. The low solubility <b>[MV](Br<sub>3</sub>)<sub>2</sub></b> complex in the catholyte during the battery charge process not only mitigates the crossover of charged tribromide species (Br<sub>3</sub><sup>-</sup>) and addresses the toxicity concern of volatile bromine simultaneously. A 1.53 V bipolar MV/Br AORFB delivered outstanding battery performance at pH neutral conditions, specifically, 100% total capacity retention, 133 mW/cm<sup>2</sup> power density, and 60% energy efficiency at 40 mA/cm<sup>2</sup>.

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