Abstract
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.
Highlights
Expanding global industrial development and rapid growth of world human population has issued toward drastic increase of energy demand
In the similar year, worldwide energy consumption for G20 countries was reported as 10.9 Gtoe, in contrast to 8.1 Gtoe in 2000; this indicated an increment of 34 % [1]
The percentage of increment of energy consumption attributed to the growth of world population with the estimation number provided by United Nation is 7.35 billion in 2015 compared with 6.13 billion in 2000 [2] and industrial demands over years
Summary
Expanding global industrial development and rapid growth of world human population has issued toward drastic increase of energy demand. The percentage of increment of energy consumption attributed to the growth of world population with the estimation number provided by United Nation is 7.35 billion in 2015 compared with 6.13 billion in 2000 [2] and industrial demands over years. The excellent system scalability of RFBs, along with large capacity and cycle life, inherent safety, decoupling power and energy have received increasing attention recent years to be serve as one of the most promising large scale energy storage systems [5]–[7]. Redox reaction tends to happen in both electrolyte compartments To address this challenges [15]– [17] faced by most in-organic RFBs, recent evidences suggests that the introduction of organic redox couples elevate the possibility of cost reduction (> USD $35 per kW h) [18]–[22].
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