A subtractive approach to molecular engineering of dimethoxybenzene-based redox materials for non-aqueous flow batteries

2015 ◽  
Vol 3 (29) ◽  
pp. 14971-14976 ◽  
Author(s):  
Jinhua Huang ◽  
Liang Su ◽  
Jeffrey A. Kowalski ◽  
John L. Barton ◽  
Magali Ferrandon ◽  
...  
Keyword(s):  
High Capacity ◽  
Molecular Engineering ◽  
Active Materials ◽  
Redox Flow Batteries ◽  
Redox Active ◽  
Flow Batteries ◽  
Aqueous Flow

The development of new high capacity redox active materials is key to realizing the potential of non-aqueous redox flow batteries (RFBs).

Molecular Engineering of Azobenzene‐Based Anolytes Towards High‐Capacity Aqueous Redox Flow Batteries

2020 ◽  
Vol 59 (49) ◽  
pp. 22163-22170 ◽  
Author(s):  
Xihong Zu ◽  
Leyuan Zhang ◽  
Yumin Qian ◽  
Changkun Zhang ◽  
Guihua Yu
Keyword(s):  
High Capacity ◽  
Molecular Engineering ◽  
Redox Flow Batteries ◽  
Flow Batteries

scholarly journals Redox‐Flow Batteries: From Metals to Organic Redox‐Active Materials

2016 ◽  
Vol 56 (3) ◽  
pp. 686-711 ◽  
Author(s):  
Jan Winsberg ◽  
Tino Hagemann ◽  
Tobias Janoschka ◽  
Martin D. Hager ◽  
Ulrich S. Schubert
Keyword(s):  
Active Materials ◽  
Redox Flow Batteries ◽  
Redox Active ◽  
Flow Batteries

Molecular Engineering of Azobenzene‐Based Anolytes Towards High‐Capacity Aqueous Redox Flow Batteries

2020 ◽  
Vol 132 (49) ◽  
pp. 22347-22354
Author(s):  
Xihong Zu ◽  
Leyuan Zhang ◽  
Yumin Qian ◽  
Changkun Zhang ◽  
Guihua Yu
Keyword(s):  
High Capacity ◽  
Molecular Engineering ◽  
Redox Flow Batteries ◽  
Flow Batteries

scholarly journals Balancing high energy density and chemical stability in redox flow batteries with symmetric tetrazines

2021 ◽  
Author(s):  
Gloria De La Garza ◽  
Aman Kaur ◽  
Ilya Shkrob ◽  
Lily Robertson ◽  
Susan Odom ◽  
...  
Keyword(s):  
Negative Charge ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
High Solubility ◽  
Active Materials ◽  
Redox Flow Batteries ◽  
Redox Active ◽  
Flow Batteries ◽  
Electron Reduction

Nonaqueous redox flow batteries are a promising technology for grid-scale energy storage, however, their commercial success relies on identifying redox active materials that exhibit extreme potentials, high solubilities in all states of charge, and long cycling stabilities. Meeting these requirements has been particularly challenging for molecules capable of storing negative charge. Within this context, the symmetric tetrazines remain unexplored despite their unique structural properties that enable them to meet these challenges. Herein, we prepared s-tetrazines substituted with methyl, methoxy, and thiomethyl substituents and evaluated their electrochemical properties, solubility, and cycling stability. These studies revealed that 3,6-dimethoxy-s-tetrazine undergoes a reversible one-electron reduction to generate a soluble (>0.5 M in electrolyte/solvent) and stable (t1/2 > 1240 h) radical anion. When implemented in a lab-scale flow battery, it exhibited a relatively slow capacity fade of 13% over 100 cycles (38 h). Given their uncommonly high solubility and cycling stability, we believe that s-tetrazine derivatives should be further explored for non-aqueous redox flow batteries.

Reversible ketone hydrogenation and dehydrogenation for aqueous organic redox flow batteries

Science ◽  
2021 ◽  
Vol 372 (6544) ◽  
pp. 836-840
Author(s):  
Ruozhu Feng ◽  
Xin Zhang ◽  
Vijayakumar Murugesan ◽  
Aaron Hollas ◽  
Ying Chen ◽  
...  
Keyword(s):  
Large Scale ◽  
Molecular Engineering ◽  
Environmentally Benign ◽  
Active Materials ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Ketone Hydrogenation ◽  
Electro Oxidation ◽  
Alcohol Conversion

Aqueous redox flow batteries with organic active materials offer an environmentally benign, tunable, and safe route to large-scale energy storage. Development has been limited to a small palette of organics that are aqueous soluble and tend to display the necessary redox reversibility within the water stability window. We show how molecular engineering of fluorenone enables the alcohol electro-oxidation needed for reversible ketone hydrogenation and dehydrogenation at room temperature without the use of a catalyst. Flow batteries based on these fluorenone derivative anolytes operate efficiently and exhibit stable long-term cycling at ambient and mildly increased temperatures in a nondemanding environment. These results expand the palette to include reversible ketone to alcohol conversion but also suggest the potential for identifying other atypical organic redox couple candidates.

Aqueous Redox Flow Batteries: How ‘Green’ are the Redox Active Materials?

2021 ◽  
Author(s):  
Zachary Deller ◽  
Lathe A Jones ◽  
Subashani Maniam
Keyword(s):  
Solar Wind ◽  
Renewable Energy ◽  
Energy Storage ◽  
Energy Industry ◽  
Active Materials ◽  
Redox Flow Batteries ◽  
Redox Active ◽  
Flow Batteries ◽  
Renewable Energy Industry

Energy storage using aqueous organic redox flow batteries (ORFBs) is gaining momentum in recent years parallel with the renewable energy industry, principally to store energy from solar, wind and hydro...

Mapping the frontiers of quinone stability in aqueous media: implications for organic aqueous redox flow batteries

2019 ◽  
Vol 7 (20) ◽  
pp. 12833-12841 ◽  
Author(s):  
Daniel P. Tabor ◽  
Rafael Gómez-Bombarelli ◽  
Liuchuan Tong ◽  
Roy G. Gordon ◽  
Michael J. Aziz ◽  
...  
Keyword(s):  
Virtual Screening ◽  
High Throughput ◽  
Aqueous Media ◽  
Redox Flow Batteries ◽  
Redox Active ◽  
Flow Batteries ◽  
Aqueous Flow ◽  
The Stability ◽  
Stability Limits ◽  
High Throughput Virtual Screening

The stability limits of quinones, molecules that show promise as redox-active electrolytes in aqueous flow batteries, are explored for a range of backbone and substituent combinations with high-throughput virtual screening.

Redox-active poly(ionic liquid)s as active materials for energy storage applications

2017 ◽  
Vol 5 (31) ◽  
pp. 16231-16240 ◽  
Author(s):  
G. Hernández ◽  
M. Işik ◽  
D. Mantione ◽  
A. Pendashteh ◽  
P. Navalpotro ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Energy Storage ◽  
Lithium Metal ◽  
Active Materials ◽  
Redox Flow Batteries ◽  
Redox Active ◽  
Flow Batteries ◽  
Energy Storage Applications ◽  
Poly Ionic Liquid ◽  
Storage Technologies

The incorporation of redox-active counter anions (anthraquinone and nitroxide groups) into poly(ionic liquid)s broadens the scope of applications to different energy storage technologies such as lithium, metal-air or redox-flow batteries.

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