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.

scholarly journals Progress and directions in low-cost redox-flow batteries for large-scale energy storage

2017 ◽  
Vol 4 (1) ◽  
pp. 91-105 ◽  
Author(s):  
Bin Li ◽  
Jun Liu
Keyword(s):  
Energy Storage ◽  
Large Scale ◽  
Low Cost ◽  
Lithium Ion ◽  
High Energy ◽  
Water Soluble ◽  
Side Reactions ◽  
Aqueous Systems ◽  
Redox Flow Batteries ◽  
Flow Batteries

Abstract Compared to lithium-ion batteries, redox-flow batteries have attracted widespread attention for long-duration, large-scale energy-storage applications. This review focuses on current and future directions to address one of the most significant challenges in energy storage: reducing the cost of redox-flow battery systems. A high priority is developing aqueous systems with low-cost materials and high-solubility redox chemistries. Highly water-soluble inorganic redox couples are important for developing technologies that can provide high energy densities and low-cost storage. There is also great potential to rationally design organic redox molecules and fine-tune their properties for both aqueous and non-aqueous systems. While many new concepts begin to blur the boundary between traditional batteries and redox-flow batteries, breakthroughs in identifying/developing membranes and separators and in controlling side reactions on electrode surfaces also are needed.

scholarly journals Designing for conjugate addition: an amine functionalised quinone anolyte for redox flow batteries

2021 ◽  
Author(s):  
Rajesh Bharat Jethwa ◽  
Evan Wenbo Zhao ◽  
Rachel N. Kerber ◽  
Erlendur Jónsson ◽  
Dominic S Wright ◽  
...  
Keyword(s):  
Energy Density ◽  
Storage Systems ◽  
Conjugate Addition ◽  
High Energy ◽  
Emerging Technology ◽  
High Energy Density ◽  
Organic Electrolytes ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Grid Level

Redox flow batteries (RFBs) are promising grid-level electrical storage systems. The key to this emerging technology is the development of cheap, highly soluble, and high energy-density inorganic and organic electrolytes....

Eutectic Electrolytes for High-Energy-Density Redox Flow Batteries

2018 ◽  
Vol 3 (12) ◽  
pp. 2875-2883 ◽  
Author(s):  
Changkun Zhang ◽  
Leyuan Zhang ◽  
Yu Ding ◽  
Xuelin Guo ◽  
Guihua Yu
Keyword(s):  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Redox Flow Batteries ◽  
Flow Batteries

Development of High Energy Density Diaminocyclopropenium‐Phenothiazine Hybrid Catholytes for Non‐Aqueous Redox Flow Batteries

2021 ◽  
Author(s):  
Yichao Yan ◽  
David B. Vogt ◽  
Thomas P. Vaid ◽  
Matthew S. Sigman ◽  
Melanie Sanford
Keyword(s):  
Energy Density ◽  
High Energy ◽  
High Energy Density ◽  
Redox Flow Batteries ◽  
Flow Batteries

Asymmetric allyl-activation of organosulfides for high-energy reversible redox flow batteries

2019 ◽  
Vol 12 (7) ◽  
pp. 2244-2252 ◽  
Author(s):  
Guo-Ming Weng ◽  
Bin Yang ◽  
Chi-You Liu ◽  
Guan-Ying Du ◽  
Elise Y. Li ◽  
...  
Keyword(s):  
High Energy ◽  
Redox Flow Batteries ◽  
Reversible Redox ◽  
Flow Batteries

This work demonstrates an effective and universal strategy to improve the sluggish organosulfides (R–Sn–R) for redox flow batteries by asymmetric allylsubstituted organosulfides (R–Sn–A).

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.

TEMPO/Phenazine Combi-Molecule: A Redox-Active Material for Symmetric Aqueous Redox-Flow Batteries

2016 ◽  
Vol 1 (5) ◽  
pp. 976-980 ◽  
Author(s):  
Jan Winsberg ◽  
Christian Stolze ◽  
Simon Muench ◽  
Ferenc Liedl ◽  
Martin D. Hager ◽  
...  
Keyword(s):  
Active Material ◽  
Redox Flow Batteries ◽  
Redox Active ◽  
Flow Batteries
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