scholarly journals The Promise of Environmentally Benign Redox Flow Batteries by Molecular Engineering

2017 ◽  
Vol 56 (30) ◽  
pp. 8614-8616 ◽  
Author(s):  
Yu Ding ◽  
Guihua Yu
Keyword(s):  
Molecular Engineering ◽  
Environmentally Benign ◽  
Redox Flow Batteries ◽  
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.

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

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 Molecular Engineering Strategies for Symmetric Aqueous Organic Redox Flow Batteries

2019 ◽  
Author(s):  
Rocco Peter Fornari ◽  
Murat Mesta ◽  
Johan Hjelm ◽  
Tejs Vegge ◽  
Piotr de Silva
Keyword(s):  
Intramolecular Hydrogen Bonding ◽  
Molecular Engineering ◽  
Oxidation States ◽  
Electronic Interaction ◽  
Redox Potentials ◽  
Redox Flow Batteries ◽  
Energy Storage Technology ◽  
Flow Batteries ◽  
The Difference ◽  
Intramolecular Hydrogen

<p>Symmetric aqueous organic redox flow batteries (RFBs) are potentially a cheap, durable and safe energy storage technology. Unlike normal asymmetric flow batteries, they are based on electrolytes that exist in at least three oxidation states and can undergo a minimum of two distinct redox processes. We compute the redox potentials of selected electrolytes intending to understand how the interaction between the redox units affects the potentials. We find that electronic interaction between redox units and intramolecular hydrogen bonding can both be exploited to tune the difference between the redox potentials, i.e. the theoretical voltage of the battery. The redox potentials can be further fine-tuned in either direction by adding substituents. Starting from these observations we formulate a set of rules which will help finding ideal candidates for symmetric RFBs.</p>

scholarly journals Molecular Engineering Strategies for Symmetric Aqueous Organic Redox Flow Batteries

2019 ◽  
Author(s):  
Rocco Peter Fornari ◽  
Murat Mesta ◽  
Johan Hjelm ◽  
Tejs Vegge ◽  
Piotr de Silva
Keyword(s):  
Intramolecular Hydrogen Bonding ◽  
Molecular Engineering ◽  
Oxidation States ◽  
Electronic Interaction ◽  
Redox Potentials ◽  
Redox Flow Batteries ◽  
Energy Storage Technology ◽  
Flow Batteries ◽  
The Difference ◽  
Intramolecular Hydrogen

<p>Symmetric aqueous organic redox flow batteries (RFBs) are potentially a cheap, durable and safe energy storage technology. Unlike normal asymmetric flow batteries, they are based on electrolytes that exist in at least three oxidation states and can undergo a minimum of two distinct redox processes. We compute the redox potentials of selected electrolytes intending to understand how the interaction between the redox units affects the potentials. We find that electronic interaction between redox units and intramolecular hydrogen bonding can both be exploited to tune the difference between the redox potentials, i.e. the theoretical voltage of the battery. The redox potentials can be further fine-tuned in either direction by adding substituents. Starting from these observations we formulate a set of rules which will help finding ideal candidates for symmetric RFBs.</p>

scholarly journals Molecular Engineering Strategies for Symmetric Aqueous Organic Redox Flow Batteries

2020 ◽  
Vol 2 (3) ◽  
pp. 239-246 ◽  
Author(s):  
Rocco Peter Fornari ◽  
Murat Mesta ◽  
Johan Hjelm ◽  
Tejs Vegge ◽  
Piotr de Silva
Keyword(s):  
Molecular Engineering ◽  
Redox Flow Batteries ◽  
Flow Batteries

Molecular engineering of organic electroactive materials for redox flow batteries

2018 ◽  
Vol 47 (1) ◽  
pp. 69-103 ◽  
Author(s):  
Yu Ding ◽  
Changkun Zhang ◽  
Leyuan Zhang ◽  
Yangen Zhou ◽  
Guihua Yu
Keyword(s):  
Energy Storage ◽  
Large Scale ◽  
Storage System ◽  
Energy Storage System ◽  
Molecular Engineering ◽  
Electroactive Materials ◽  
Redox Flow Batteries ◽  
System P ◽  
Flow Batteries ◽  
High Scalability

With high scalability and independent control over energy and power, redox flow batteries (RFBs) stand out as an important large-scale energy storage system.

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