scholarly journals Perspective—Insights into Solar-Rechargeable Redox Flow Cell Design: A Practical Perspective for Lab-Scale Experiments

2021 ◽  
Author(s):  
Shaun Whitley ◽  
Dowon Bae
Keyword(s):  
Flow Cell ◽  
Operating Conditions ◽  
Flow Cells ◽  
Redox Flow Batteries ◽  
Current Trends ◽  
Redox Flow Cell ◽  
Flow Batteries ◽  
High System ◽  
High Flexibility ◽  
And Storage

Abstract Solar-rechargeable redox flow batteries (SRFBs) offer feasible solar energy storage with high flexibility in redox couples and storage capacity. Unlike traditional redox flow batteries, homemade flow cell reactors are commonly used in most solar-rechargeable redox flow batteries integrated with photoelectrochemical devices as it provides high system flexibility. This perspective article discusses current trends of the architectural and material characteristics of state-of-the-art photoelectrochemical flow cells for SRFB applications. Key design aspects and guidelines to build a photoelectrochemical flow cell, considering practical operating conditions, are proposed in this perspective.

scholarly journals Electrochemical Studies on Alizarin Red S as Negolyte for Redox Flow Battery: a Preliminary Study

2018 ◽  
Vol 7 (4.35) ◽  
pp. 375
Author(s):  
C. Khor ◽  
M. R. Mohamed ◽  
C. K. Feng ◽  
P. K. Leung
Keyword(s):  
Diffusion Coefficient ◽  
Negative Electrode ◽  
Operating Conditions ◽  
Alizarin Red S ◽  
Fast Diffusion ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Alizarin Red ◽  
Redox Flow Batteries ◽  
Flow Batteries

Redox flow battery (RFB) has received tremendous attention as energy storage system coupled with renewable energy sources. In this paper, a low-cost alizarin red S (ARS) organic dye is proposed to serve as the active material for the negative electrode reaction for organic redox flow batteries. Cyclic voltammetry has been conducted under a number of operating conditions to reveal the electrochemical performance of this molecule. The results suggest that ARS is highly reversible at low electrode potential (c.a. 0.082 V vs. standard hydrogen electrode), indicating that ARS is a promising negative electrode material for organic redox flow batteries. The diffusion coefficient of ARS is calculated in the range of 6.424 x 10-4 cm2 s-1, This has indicated fast diffusion rate and electrochemical kinetics for oxidation and reduction in higher concentration of ARS. It has been found out that the higher concentration of ARS in base electrolyte cause lowest diffusion coefficient due to solubility issue of ARS.

scholarly journals Unbiased, complete solar charging of a neutral flow battery by a single Si photocathode

RSC Advances ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 6331-6340 ◽  
Author(s):  
Kristina Wedege ◽  
Dowon Bae ◽  
Emil Dražević ◽  
Adélio Mendes ◽  
Peter C. K. Vesborg ◽  
...  
Keyword(s):  
Solar Energy ◽  
Flow Battery ◽  
Integrated Technology ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Neutral Flow ◽  
And Storage

Solar redox flow batteries have attracted attention as a possible integrated technology for simultaneous conversion and storage of solar energy.

scholarly journals Substituted thiadiazoles as energy-rich anolytes for nonaqueous redox flow cells

2018 ◽  
Vol 6 (15) ◽  
pp. 6251-6254 ◽  
Author(s):  
Jinhua Huang ◽  
Wentao Duan ◽  
Jingjing Zhang ◽  
Ilya A. Shkrob ◽  
Rajeev S. Assary ◽  
...  
Keyword(s):  
Organic Molecules ◽  
Structure Property ◽  
Flow Cells ◽  
Redox Flow Batteries ◽  
Structure Property Relationships ◽  
Redox Active ◽  
Flow Batteries ◽  
Redox Flow Cells

Understanding structure–property relationships is essential for designing energy-rich redox active organic molecules (ROMs) for all-organic redox flow batteries.

scholarly journals Nanoscopic and Macro-Porous Carbon Nano-foam Electrodes with Improved Mass Transport for Vanadium Redox Flow Batteries

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Ibrahim Mustafa ◽  
Rahmat Susantyoko ◽  
Chieh-Han Wu ◽  
Fatima Ahmed ◽  
Raed Hashaikeh ◽  
...  
Keyword(s):  
Mass Transport ◽  
Porous Carbon ◽  
Tape Casting ◽  
Flow Cell ◽  
Full Potential ◽  
High Porosity ◽  
Free Standing ◽  
Multiwalled Carbon ◽  
Redox Flow Batteries ◽  
Flow Batteries

AbstractAlthough free-standing sheets of multiwalled carbon nanotubes (MWCNT) can provide interesting electrochemical and physical properties as electrodes for redox flow batteries, the full potential of this class of materials has not been accessible as of yet. The conventional fabrication methods produce sheets with micro-porous and meso-porous structures, which significantly resist mass transport of the electrolyte during high-current flow-cell operation. Herein, we developed a method to fabricate high performance macro-porous carbon nano-foam free standing sheets (Puffy Fibers, PF), by implementing a freeze-drying step into our low cost and scalable surface-engineered tape-casting (SETC) fabrication method, and we show the improvement in the performance attained as compared with a MWCNT sheet lacking any macro pores (Tape-cast, TC). We attribute the higher performance attained by our in-lab fabricated PF papers to the presence of macro pores which provided channels that acted as pathways for electrolytic transport within the bulk of the electrode. Moreover, we propose an electrolytic transport mechanism to relate ion diffusivity to different pore sizes to explain the different modes of charge transfer in the negative and the positive electrolytes. Overall, the PF papers had a high wettability, high porosity, and a large surface area, resulting in improved electrochemical and flow-cell performances.

scholarly journals Design of a miniature flow cell forin situx-ray imaging of redox flow batteries

2016 ◽  
Vol 49 (43) ◽  
pp. 434002 ◽  
Author(s):  
Rhodri Jervis ◽  
Leon D Brown ◽  
Tobias P Neville ◽  
Jason Millichamp ◽  
Donal P Finegan ◽  
...  
Keyword(s):  
Flow Cell ◽  
Redox Flow Batteries ◽  
Flow Batteries

A review on recent developments of anion exchange membranes for fuel cells and redox flow batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (47) ◽  
pp. 37206-37230 ◽  
Author(s):  
Sandip Maurya ◽  
Sung-Hee Shin ◽  
Yekyung Kim ◽  
Seung-Hyeon Moon
Keyword(s):  
Fuel Cells ◽  
Anion Exchange ◽  
Storage Systems ◽  
Anion Exchange Membranes ◽  
Future Perspectives ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Energy Conversion And Storage ◽  
Recent Developments ◽  
And Storage

This review covers recent advancements and future perspectives of AEMs for energy conversion and storage systems such as fuel cells and redox flow batteries.

scholarly journals Determining Performance Limits for Non-Aqueous Redox Flow Batteries

2021 ◽  
Author(s):  
Zhijiang Tang ◽  
Aman Preet Kaur ◽  
Alan Pezeshki ◽  
Subrahmanyam Modekrutti ◽  
Frank Delnick ◽  
...  
Keyword(s):  
Energy Density ◽  
Cycling Performance ◽  
Flow Cell ◽  
Aqueous System ◽  
Redox Flow Battery ◽  
Performance Limits ◽  
Redox Flow Batteries ◽  
Redox Flow Cell ◽  
Aqueous Flow ◽  
Vanadium Redox

<p>In this work, we explore the limits of performance and energy density of a non-aqueous redox flow battery under ideal conditions. We compared the performance of an organic redox couple in a symmetric cell to that of a vanadium redox flow cell. Based on cycling performance, we expect that ­– when losses from separators and poor ionic conductivity are minimized – a non-aqueous flow cell operating at 3.5 V should have a 35% higher energy density than V<sup>4/5+</sup> couple in aqueous system at 100 mA∙cm<sup>-2</sup> current density for a system that could operate at 3.5 V.</p>

scholarly journals Determining Performance Limits for Non-Aqueous Redox Flow Batteries

2021 ◽  
Author(s):  
Zhijiang Tang ◽  
Aman Preet Kaur ◽  
Alan Pezeshki ◽  
Subrahmanyam Modekrutti ◽  
Frank Delnick ◽  
...  
Keyword(s):  
Energy Density ◽  
Cycling Performance ◽  
Flow Cell ◽  
Aqueous System ◽  
Redox Flow Battery ◽  
Performance Limits ◽  
Redox Flow Batteries ◽  
Redox Flow Cell ◽  
Aqueous Flow ◽  
Vanadium Redox

<p>In this work, we explore the limits of performance and energy density of a non-aqueous redox flow battery under ideal conditions. We compared the performance of an organic redox couple in a symmetric cell to that of a vanadium redox flow cell. Based on cycling performance, we expect that ­– when losses from separators and poor ionic conductivity are minimized – a non-aqueous flow cell operating at 3.5 V should have a 35% higher energy density than V<sup>4/5+</sup> couple in aqueous system at 100 mA∙cm<sup>-2</sup> current density for a system that could operate at 3.5 V.</p>

Surface Modification of Sulfonated Poly(phenylene oxide) Membrane for Vanadium Redox Flow Batteries

2020 ◽  
Vol 20 (9) ◽  
pp. 5765-5770
Author(s):  
Sung-Hee Roh ◽  
Dong-Seok Shin ◽  
Dae-Kweon Kang ◽  
Sang-Chai Kim ◽  
Ung-Il Kang ◽  
...  
Keyword(s):  
Polymer Electrolyte Membrane ◽  
Operating Conditions ◽  
Term Operation ◽  
Electrolyte Membrane ◽  
Redox Flow Batteries ◽  
Phenylene Oxide ◽  
Flow Batteries ◽  
Dopamine Hydrochloride ◽  
Vanadium Redox ◽  
Sulfonated Poly

Sulfonated poly(phenylene) oxide (sPPO) polymer is coated in a dopamine hydrochloride solution to prepare a highly durable, low-price polymer membrane for vanadium redox flow batteries (VRFBs). The polydopamine (PDA) coating on the sPPO membrane is confirmed using SEM and EDX analysis. sPPO coated with PDA exhibits decreased proton conductivity due to high resistance. However, VO+2 reducibility tests shows that the chemical stability is improved due to the introduction of the PDA coating layer on the sPPO membrane, which has a chemical structure with poor durability in VO+2 solution under the operating conditions of a VRFB. These results show that this polymer electrolyte membrane based on PDA-coated sPPO is a candidate for application in the long-term operation of VRFBs.

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