Fabrication of Freestanding Sheets of Multiwalled Carbon Nanotubes (Buckypapers) for Vanadium Redox Flow Batteries and Effects of Fabrication Variables on Electrochemical Performance

2017 ◽  
Vol 230 ◽  
pp. 222-235 ◽  
Author(s):  
Ibrahim Mustafa ◽  
Ivan Lopez ◽  
Hammad Younes ◽  
Rahmat Agung Susantyoko ◽  
Rashid Abu Al-Rub ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrochemical Performance ◽  
Multiwalled Carbon Nanotubes ◽  
Multiwalled Carbon ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Vanadium Redox

Effects of carbonaceous impurities on the electrochemical activity of multiwalled carbon nanotube electrodes for vanadium redox flow batteries

Carbon ◽  
2018 ◽  
Vol 131 ◽  
pp. 47-59 ◽  
Author(s):  
Ibrahim Mustafa ◽  
Asma Al Shehhi ◽  
Ayoob Al Hammadi ◽  
Rahmat Susantyoko ◽  
Giovanni Palmisano ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Electrochemical Activity ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
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.

Impedance-Resolved Beginning-of-Life Electrochemical Performance and Durability of Treated Carbon Felt Electrodes in Vanadium Redox Flow Batteries

2020 ◽  
Vol MA2020-01 (3) ◽  
pp. 477-477
Author(s):  
Michael Daugherty ◽  
Douglas Aaron ◽  
Alan Pezeshki ◽  
Robert L Sacci ◽  
Matthew M. Mench
Keyword(s):  
Electrochemical Performance ◽  
Carbon Felt ◽  
Redox Flow Batteries ◽  
Flow Batteries ◽  
Treated Carbon ◽  
Vanadium Redox ◽  
Felt Electrodes

scholarly journals Dopamine-derived nitrogen-doped carboxyl multiwalled carbon nanotube-modified graphite felt with improved electrochemical activity for vanadium redox flow batteries

2020 ◽  
Vol 7 (7) ◽  
pp. 200402
Author(s):  
Qiang Li ◽  
Anyu Bai ◽  
Tianyu Zhang ◽  
Song Li ◽  
Hong Sun
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Synergetic Effect ◽  
Electrochemical Activity ◽  
Vanadium Redox Flow Battery ◽  
Multiwalled Carbon ◽  
Graphite Felt ◽  
Nitrogen Doped ◽  
Effect Of Oxygen ◽  
Vanadium Redox

Improving the electrochemical activity of electrodes is essential to the development of vanadium redox flow battery (VRFB). In this work, we prepared a novel electrode with the modification of nitrogen-doped carboxyl multiwalled carbon nanotubes using dopamine as an eco-friendly nitrogen source (carboxyl MWCNT@PDAt). Characterization and electrochemical measurements reveal that the synthesized carboxyl MWCNT@PDAt-modified graphite felt electrode (carboxyl MWCNT@PDAt/GF) exhibits excellent electrochemical performance toward VO 2+ / V O 2 + reaction. Superior battery performance was obtained with the energy efficiency of 80.54% at a current density of 80 mA cm −2 . Excellent durability of the carboxyl MWCNT@PDAt/GF electrode was confirmed by long-term charge/discharge tests. The enhanced reaction kinetics of VO 2+ / V O 2 + is ascribed to the synergetic effect of oxygen and nitrogen containing groups on graphite felt surface and the presence of nitrogen-doped carboxyl multiwalled carbon nanotubes (MWCNT). The facile approach proposed in this paper provides a new route to the fabrication of electrode with excellent performance for VRFB.

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