Highly porous WO3/CNTs-graphite film as a novel and low-cost positive electrode for vanadium redox flow battery

2020 ◽  
Vol 24 (10) ◽  
pp. 2315-2324
Author(s):  
Masoud Faraji ◽  
Roya Khalilzadeh Soltanahmadi ◽  
Soudabeh Seyfi ◽  
Borhan Mostafavi Bavani ◽  
Hossein Mohammadzadeh Aydisheh
Keyword(s):  
Low Cost ◽  
Positive Electrode ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Graphite Film ◽  
Vanadium Redox ◽  
Highly Porous

HF/H2O2 treated graphite felt as the positive electrode for vanadium redox flow battery

2017 ◽  
Vol 423 ◽  
pp. 111-118 ◽  
Author(s):  
Zhangxing He ◽  
Yingqiao Jiang ◽  
Wei Meng ◽  
Fengyun Jiang ◽  
Huizhu Zhou ◽  
...  
Keyword(s):  
Positive Electrode ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Graphite Felt ◽  
Vanadium Redox

scholarly journals GO-modified membranes for vanadium redox flow battery

2019 ◽  
Vol 90 ◽  
pp. 01004 ◽  
Author(s):  
Saidatul Sophia ◽  
Ebrahim Abouzari Lotf ◽  
Arshad Ahmad ◽  
Pooria Moozarm Nia ◽  
Roshafima Rasit Ali
Keyword(s):  
Low Cost ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
The Stability ◽  
High Flexibility ◽  
Vanadium Redox ◽  
Vanadium Ion ◽  
Excellent Stability

Graphene oxide (GO) has attracted tremendous attention in membrane-based separation field as it can filter ions and molecules. Recently, GO-based materials have emerged as excellent modifiers for vanadium redox flow battery (VRFB) application. Its high mechanical and chemical stability, nearly frictionless surface, high flexibility, and low cost make GO-based materials as proper materials for the membranes in VRFB. In VRFB, a membrane acts as the key component to determine the performance. Therefore, employing low vanadium ion permeability with excellent stability membrane in vanadium electrolytes is important to ensure high battery performance. Herein, recent progress of GO-modified membranes for VRFB is briefly reviewed. This review begins with current membranes used for VRFB, followed by the challenges faced by the membranes. In addition, the transport mechanism of vanadium ion and the stability properties of GO-modified membranes are also discussed to enlighten the role of GO in the modified membranes.

Carbon layer-exfoliated, wettability-enhanced, SO3H-functionalized carbon paper: A superior positive electrode for vanadium redox flow battery

Carbon ◽  
2018 ◽  
Vol 127 ◽  
pp. 297-304 ◽  
Author(s):  
Zhangxing He ◽  
Yingqiao Jiang ◽  
Yuehua Li ◽  
Jing Zhu ◽  
Huizhu Zhou ◽  
...  
Keyword(s):  
Carbon Layer ◽  
Positive Electrode ◽  
Vanadium Redox Flow Battery ◽  
Carbon Paper ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Vanadium Redox

scholarly journals Thiourea-Grafted Graphite Felts as Positive Electrode for Vanadium Redox Flow Battery

2021 ◽  
Vol 8 ◽  
Author(s):  
Shangzhuo Wu ◽  
Xin Lv ◽  
Zhijun Ge ◽  
Ling Wang ◽  
Lei Dai ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Positive Electrode ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Peak Potential ◽  
Flow Battery ◽  
X Ray ◽  
Vanadium Redox ◽  
Acid Esterification ◽  
Electro Catalytic Activity

In this paper, thiourea was successfully grafted onto the surface of acid preprocessed graphite felts [sulfuric acid-treated graphite felt (SA-GFs)] by thiol-carboxylic acid esterification. The thiourea-grafted graphite felts (TG-GFs) were investigated as the positive electrode for vanadium redox flow battery (VRFB). X-ray photoelectron spectroscopy results suggested that thiourea was grafted into the surface of graphite felts. The cyclic voltammetry showed that the peak potential separation decreased by 0.2 V, and peak currents were greatly enhanced on TG-GF electrode compared with SA-GF electrode, implying improved electro-catalytic activity and reversibility of TG-GF electrode toward VO2+/VO2+ redox reaction. The initial capacity of TG-GF-based cell reached 55.6 mA h at 100 mA cm−2, 22.6 mA h larger than that of SA-GF-based cell. The voltage and energy efficiency for TG-GF-based cell increased by 4.9% and 4.4% compared with those of SA-GF-based cell at 100 mA cm−2, respectively.

Design, Development, and Testing of a Low-Concentration Vanadium Redox Flow Battery

2020 ◽  
Vol 18 (1) ◽  
Author(s):  
Kyle Lourenssen ◽  
James Williams ◽  
Faraz Ahmadpour ◽  
Ryan Clemmer ◽  
S. Andrew Gadsden ◽  
...  
Keyword(s):  
Low Cost ◽  
Experimental Tests ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Design Development ◽  
Flow Battery ◽  
Membrane Area ◽  
Low Concentration ◽  
Computational Performance ◽  
Vanadium Redox

Abstract The purpose of this paper is to highlight the design, development, and testing of a low-concentration vanadium redox flow battery (VRFB). The low-cost implementation has a 7 cm × 7 cm active membrane area and an electrolyte volume of 450 mL for each positive and negative electrolyte. The electrolyte concentration is approximately 0.066 M vanadium. An H-cell for performing electrolysis with the electrolytes is developed, and the process and method for creating the electrolyte for this low-concentration implementation are described and documented. The maximum power density and energy efficiency of the battery among tests between 500 and 800 mA are 1.32 W/L and 28.51%, respectively. Results are presented in terms of polarization curves, charge/discharge cycles, and voltage, coulombic, and energy efficiencies. Adaptation of a COMSOL Multiphysics model is implemented to compare the computational performance figures and the results of our VRFB implementation. The numerical results agree with experimentation, and differences in the results can be attributed to the losses present in the experimental tests. The proposed battery and design are intended to investigate the performance and feasibility of a low-concentration VRFB. The ultimate long-term objective of this research is the development of a novel, cost-effective, and safe redox flow battery using hydrogen peroxide as one of the electrolytes.

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