scholarly journals Symmetric, Robust, and High-Voltage Organic Redox Flow Battery Model Based on a Helical Carbenium Ion Electrolyte

2020 ◽  
Author(s):  
Jules Moutet ◽  
José M. Veleta ◽  
Thomas L. Gianetti
Keyword(s):  
High Voltage ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Battery Model ◽  
Model Based ◽  
Carbenium Ion

scholarly journals Symmetric, Robust, and High-voltage Organic Redox Flow Battery Model Based on a Helical Carbenium Ion Electrolyte

2020 ◽  
Author(s):  
Jules Moutet ◽  
Jose M Veleta ◽  
thomas Gianetti
Keyword(s):  
Open Circuit Potential ◽  
Open Circuit ◽  
Kinetic Properties ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Capacity Retention ◽  
Battery Model ◽  
Redox Active ◽  
Carbenium Ion ◽  
Scale Integration

Redox flow batteries (RFBs) represent a promising technology for grid-scale integration of renewable energy. Redox-active molecular pairs with large potential windows have been identified as key components of these systems. However, cross-contamination problems encountered by the use of different catholyte and anolyte species still limits the development of reliable organic RFBs. Herein, we report the first use of a helical carbenium ion, with three stable oxidation states, as electrolyte for the development of symmetric cells. Cyclic voltammo-amperometric studies were conducted in acetonitrile to assess the essential kinetic properties for flow battery performance and cycling stability of this molecule. The selected [4]helicenium ion was then evaluated by using mono- and bi-electronic cycling experiments, resulting in 745 and 80 cycles respectively, with near-perfect capacity retention. This helical carbenium ion based electrolyte achieved a proof-of-principle 2.12 V open circuit potential as an all-organic symmetric RFB.<br>

Symmetric, Robust, and High-voltage Organic Redox Flow Battery Model Based on a Helical Carbenium Ion Electrolyte

2020 ◽  
Author(s):  
Jules Moutet ◽  
Jose M Veleta ◽  
thomas Gianetti
Keyword(s):  
Open Circuit Potential ◽  
Open Circuit ◽  
Kinetic Properties ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Capacity Retention ◽  
Battery Model ◽  
Redox Active ◽  
Carbenium Ion ◽  
Scale Integration

Redox flow batteries (RFBs) represent a promising technology for grid-scale integration of renewable energy. Redox-active molecular pairs with large potential windows have been identified as key components of these systems. However, cross-contamination problems encountered by the use of different catholyte and anolyte species still limits the development of reliable organic RFBs. Herein, we report the first use of a helical carbenium ion, with three stable oxidation states, as electrolyte for the development of symmetric cells. Cyclic voltammo-amperometric studies were conducted in acetonitrile to assess the essential kinetic properties for flow battery performance and cycling stability of this molecule. The selected [4]helicenium ion was then evaluated by using mono- and bi-electronic cycling experiments, resulting in 745 and 80 cycles respectively, with near-perfect capacity retention. This helical carbenium ion based electrolyte achieved a proof-of-principle 2.12 V open circuit potential as an all-organic symmetric RFB.<br>

Symmetric, Robust, and High-voltage Organic Redox Flow Battery Model Based on a Helical Carbenium Ion Electrolyte

2020 ◽  
Author(s):  
Jules Moutet ◽  
Jose M Veleta ◽  
thomas Gianetti
Keyword(s):  
Open Circuit Potential ◽  
Open Circuit ◽  
Kinetic Properties ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Capacity Retention ◽  
Battery Model ◽  
Redox Active ◽  
Carbenium Ion ◽  
Scale Integration

Redox flow batteries (RFBs) represent a promising technology for grid-scale integration of renewable energy. Redox-active molecular pairs with large potential windows have been identified as key components of these systems. However, cross-contamination problems encountered by the use of different catholyte and anolyte species still limits the development of reliable organic RFBs. Herein, we report the first use of a helical carbenium ion, with three stable oxidation states, as electrolyte for the development of symmetric cells. Cyclic voltammo-amperometric studies were conducted in acetonitrile to assess the essential kinetic properties for flow battery performance and cycling stability of this molecule. The selected [4]helicenium ion was then evaluated by using mono- and bi-electronic cycling experiments, resulting in 745 and 80 cycles respectively, with near-perfect capacity retention. This helical carbenium ion based electrolyte achieved a proof-of-principle 2.12 V open circuit potential as an all-organic symmetric RFB.<br>

scholarly journals Model-Based Condition Monitoring of a Vanadium Redox Flow Battery

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 3005 ◽  
Author(s):  
Meng ◽  
Xiong ◽  
Lim
Keyword(s):  
Parameter Identification ◽  
Real Time ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Model Parameter ◽  
Model Based ◽  
Model Parameter Identification ◽  
Vanadium Redox ◽  
Capacity Decay

The safe, efficient and durable utilization of a vanadium redox flow battery (VRB) requires accurate monitoring of its state of charge (SOC) and capacity decay. This paper focuses on the unbiased model parameter identification and model-based monitoring of both the SOC and capacity decay of a VRB. Specifically, a first-order resistor-capacitance (RC) model was used to simulate the dynamics of the VRB. A recursive total least squares (RTLS) method was exploited to attenuate the impact of external disturbances and accurately track the change of model parameters in realtime. The RTLS-based identification method was further integrated with an H-infinity filter (HIF)-based state estimator to monitor the SOC and capacity decay of the VRB in real-time. Experiments were carried out to validate the proposed method. The results suggested that the proposed method can achieve unbiased model parameter identification when unexpected noises corrupt the current and voltage measurements. SOC and capacity decay can also be estimated accurately in real-time without requiring additional open-circuit cells.

scholarly journals A combined SECM and electrochemical AFM approach to probe interfacial processes affecting molecular reactivity at redox flow battery electrodes

2020 ◽  
Vol 8 (31) ◽  
pp. 15734-15745 ◽  
Author(s):  
Tylan S. Watkins ◽  
Dipobrato Sarbapalli ◽  
Michael J. Counihan ◽  
Andrew S. Danis ◽  
Jingjing Zhang ◽  
...  
Keyword(s):  
Reaction Mechanisms ◽  
High Performance ◽  
Scanning Probe ◽  
Carbon Electrodes ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Battery Model ◽  
Interfacial Processes ◽  
Molecular Reactivity ◽  
New Strategies

Understanding interfacial reaction mechanisms of redoxmers at redox flow battery model carbon electrodes using insightful electrochemical scanning probe techniques enables new strategies for high-performance energy storage.

Functionalised carbazole as a cathode for high voltage non-aqueous organic redox flow batteries

2020 ◽  
Vol 44 (34) ◽  
pp. 14401-14410
Author(s):  
Chinmaya R. Mirle ◽  
Raja M. ◽  
Vasudevarao P. ◽  
Sankararaman S. ◽  
Kothandaraman R.
Keyword(s):  
High Voltage ◽  
Cathode Materials ◽  
Reduction Potential ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
High Reduction

Prospective high reduction potential cathode materials have been proposed that can be used in non-aqueous redox flow battery applications.

Verified reduction of dimensionality for an all-vanadium redox flow battery model

2015 ◽  
Vol 279 ◽  
pp. 345-350 ◽  
Author(s):  
A.K. Sharma ◽  
C.Y. Ling ◽  
E. Birgersson ◽  
M. Vynnycky ◽  
M. Han
Keyword(s):  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Reduction Of Dimensionality ◽  
Battery Model ◽  
Vanadium Redox
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