scholarly journals Desymmetrized hexasubstituted [3]radialene anions as aqueous organic catholytes for redox flow batteries

2020 ◽  
Vol 56 (18) ◽  
pp. 2739-2742 ◽  
Author(s):  
Nicholas A. Turner ◽  
Matthew B. Freeman ◽  
Harry D. Pratt ◽  
Austin E. Crockett ◽  
Daniel S. Jones ◽  
...  
Keyword(s):  
Redox Flow Batteries ◽  
Neutral Ph ◽  
Flow Batteries

Hexasubstituted [3]radialenes can be synthetically tuned to function as catholyte materials for neutral pH aqueous organic redox flow batteries.

Naphthalene diimide as a two-electron anolyte for aqueous and neutral pH redox flow batteries

2020 ◽  
Vol 8 (22) ◽  
pp. 11218-11223
Author(s):  
Veerababu Medabalmi ◽  
Mahesh Sundararajan ◽  
Vikram Singh ◽  
Mu-Hyun Baik ◽  
Hye Ryung Byon
Keyword(s):  
Potassium Salt ◽  
Redox Reactions ◽  
Ion Pairing ◽  
Redox Flow Batteries ◽  
Neutral Ph ◽  
Naphthalene Diimide ◽  
Flow Batteries

The potassium salt of N,N′-bis(glycinyl)naphthalene diimide [K2-BNDI] showed stable two-electron redox reactions accompanied by ion-pairing in aqueous redox-flow batteries.

scholarly journals Sulfonated tryptanthrin anolyte increases performance in pH neutral aqueous redox flow batteries

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Daniela Pinheiro ◽  
Marta Pineiro ◽  
J. Sérgio Seixas de Melo
Keyword(s):  
Alternative Energy ◽  
Active Material ◽  
High Energy ◽  
Disodium Salt ◽  
Water Soluble ◽  
Great Promise ◽  
Safe Alternative ◽  
Redox Flow Batteries ◽  
Neutral Ph ◽  
Flow Batteries

AbstractAqueous organic redox flow batteries (AORFBs) hold great promise as low-cost, environmentally friendly and safe alternative energy storage media. Here we present aqueous organometallic and all-organic active materials for RFBs with a water-soluble active material, sulfonated tryptanthrin (TRYP-SO3H), working at a neutral pH and showing long-term stability. Electrochemical measurements show that TRYP-SO3H displays reversible peaks at neutral pH values, allowing its use as an anolyte combined with potassium ferrocyanide or 4,5-dihydroxy-1,3-benzenedisulfonic acid disodium salt monohydrate as catholytes. Single cell tests show reproducible charge-discharge cycles for both catholytes, with significantly improved results for the aqueous all-organic RFB reaching high cell voltage (0.94 V) and high energy efficiencies, stabilized during at least 50 working cycles.

Neutral pH aqueous redox flow batteries using an anthraquinone-ferrocyanide redox couple

2020 ◽  
Vol 8 (17) ◽  
pp. 5727-5731 ◽  
Author(s):  
Wonmi Lee ◽  
Agnesia Permatasari ◽  
Yongchai Kwon
Keyword(s):  
Redox Couple ◽  
Disulfonic Acid ◽  
Sodium Salts ◽  
Redox Flow Batteries ◽  
Neutral Ph ◽  
Flow Batteries

Anthraquinone-2,7-disulfonic acid (2,7-AQDS) and ferrocyanide including potassium and sodium salts are used as a redox couple for neutral aqueous redox flow batteries (ARFBs).

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>.

Thermo–chemical treatments based on NH3/O2 for improved graphite-based fiber electrodes in vanadium redox flow batteries

Carbon ◽  
2013 ◽  
Vol 60 ◽  
pp. 280-288 ◽  
Author(s):  
Cristina Flox ◽  
Javier Rubio-García ◽  
Marcel Skoumal ◽  
Teresa Andreu ◽  
Juan Ramón Morante
Keyword(s):  
Chemical Treatments ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox

scholarly journals Designer Two-Electron Storage Viologen Anolyte Materials for Neutral Aqueous Organic Redox Flow Batteries

Chem ◽  
2017 ◽  
Vol 3 (6) ◽  
pp. 961-978 ◽  
Author(s):  
Camden DeBruler ◽  
Bo Hu ◽  
Jared Moss ◽  
Xuan Liu ◽  
Jian Luo ◽  
...  
Keyword(s):  
Electron Storage ◽  
Redox Flow Batteries ◽  
Flow Batteries
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