Electrocatalytic activity of Nb-doped hexagonal WO3 nanowire-modified graphite felt as a positive electrode for vanadium redox flow batteries

2016 ◽  
Vol 4 (29) ◽  
pp. 11472-11480 ◽  
Author(s):  
Daniel Manaye Kabtamu ◽  
Jian-Yu Chen ◽  
Yu-Chung Chang ◽  
Chen-Hao Wang
Keyword(s):  
Electrocatalytic Activity ◽  
Low Cost ◽  
Vanadium Redox Flow Battery ◽  
High Catalytic Activity ◽  
Facile Hydrothermal Method ◽  
Positive Electrodes ◽  
Graphite Felt ◽  
Niobium Doped ◽  
Hexagonal Wo3 Nanowire ◽  
Vanadium Redox

We report a facile hydrothermal method to synthesize low-cost, high-catalytic-activity, and stable niobium-doped hexagonal tungsten trioxide nanowires; these were employed as catalysts to improve the electrocatalytic activity of graphite felt (GF) electrodes for use as positive electrodes in an all-vanadium redox flow battery (VRFB).

High efficiency of CO 2 -activated graphite felt as electrode for vanadium redox flow battery application

2017 ◽  
Vol 364 ◽  
pp. 1-8 ◽  
Author(s):  
Yu-Chung Chang ◽  
Jian-Yu Chen ◽  
Daniel Manaye Kabtamu ◽  
Guan-Yi Lin ◽  
Ning-Yih Hsu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Vanadium Redox Flow Battery ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Graphite Felt ◽  
Vanadium Redox ◽  
Battery Application

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 A Comprehensive Study on Hydroxyl Multiwalled Carbon Nanotubes Used as Catalysts for VO2+/VO2+ Reaction in Vanadium Redox Flow Battery

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Qiang Li ◽  
Anyu Bai ◽  
Zeqiang Qu ◽  
Tianyu Zhang ◽  
Jie Li ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Cell Performance ◽  
Vanadium Redox Flow Battery ◽  
High Catalytic Activity ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Multiwalled Carbon ◽  
Vanadium Redox ◽  
Comprehensive Study

A comprehensive study on the hydroxyl multiwalled carbon nanotubes (hydroxyl MWCNTs) as catalysts in a positive reaction was performed to improve the efficiency of the vanadium redox flow battery (VRFB). The physicochemical properties of the hydroxyl MWCNT-modified electrode were characterized by using a scanning electron microscope (SEM), conductivity measurement, Brunner–Emmet–Teller (BET) measurement, X-ray photoelectron spectroscopy (XPS) analysis, cyclic voltammetry (CV) tests, electrochemical impedance spectroscopy (EIS) analysis, and charge-discharge tests. The prepared composite electrode possesses a huge amount of oxygen-containing groups, high-specific surface area, high electrical conductivity, and high catalytic activity towards the VO2+/VO2+ reaction based on physicochemical characterization. The hydroxyl MWCNT-modified graphite felt (hydroxyl MWCNTs/GF) shows the best cell performance with the energy efficiency of 79.74% and remains in high stability after 50 cycles. The improved cell performance is probably ascribed to the increase in active sites, fast charge transfer, and mass transfer rate of the introduced hydroxyl MWCNTs.

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.

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

scholarly journals Layer-by-Layer modification of graphite felt with MWCNT for vanadium redox flow battery

2019 ◽  
Vol 313 ◽  
pp. 131-140 ◽  
Author(s):  
Mathieu Etienne ◽  
Jose F. Vivo-Vilches ◽  
Ivan Vakulko ◽  
Claire Genois ◽  
Liang Liu ◽  
...  
Keyword(s):  
Vanadium Redox Flow Battery ◽  
Layer By Layer ◽  
Redox Flow Battery ◽  
Flow Battery ◽  
Graphite Felt ◽  
Vanadium Redox
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