High-power nitrided TiO2 carbon felt as the negative electrode for all-vanadium redox flow batteries

Vázquez‐Galván, Javier; Flox, Cristina; Jervis, J.R.; Sobrido, Ana Jorge; Shearing, Paul R.; Morante, Joan Ramón

doi:10.1016/j.carbon.2019.01.067

Cited by 65 publications

(30 citation statements)

References 72 publications

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“…The charge efficiency and specific capacity were also higher than that obtained in the cell of Tseng et al which included a TiO 2 –carbon black composite negative electrode [ 113 ] (discussed previously in this section). On the other hand, the energy efficiency at 200 mA cm −2 of 61% was slightly lower than that of Tseng et al Vazquez‐Galvan et al published another study on TiO 2 catalysts, [ 115 ] in which they nitrided a carbon felt electrode with NH 3 gas at high temperature after growing TiO 2 nanorods on its surface. Upon nitridation, TiO 2 was partially transformed to TiN, as confirmed by XRD.…”

Section: All‐vanadium Rfbmentioning

confidence: 81%

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Metal and Metal Oxide Electrocatalysts for Redox Flow Batteries

Amini

Gostick

Pritzker

2020

Adv Funct Materials

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Redox flow batteries (RFBs) are one of the promising technologies for large‐scale energy storage applications. For practical implementation of RFBs, it is of great interest to improve their efficiency and reduce their cost. One of the key components of RFBs that can greatly influence the efficiency and final cost is the electrode. The chemical and structural nature of electrodes can modify the kinetics of redox reactions and the accessibility of the electroactive species to available active sites. The ideal electrocatalyst for RFBs must have good activity for the desirable redox reaction, provide a high surface area, and exhibit sufficient conductivity and durability over repeated use. One strategy is to coat the electrode with metal and metal oxide electrocatalysts. Metal electrocatalysts have the advantage of high conductivity, while metal oxide catalysts are usually less expensive and so more economically attractive. In order to gain a better understanding of the performance of the electrocatalysts in RFBs, a comprehensive review of the progress in the development of metal and metal oxide electrocatalysts for RFBs is provided and a critical comparison of the latest developments is presented. Finally, practical recommendations for advancement of electrocatalysts and effective transfer of knowledge in this field are provided.

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Section: All‐vanadium Rfbmentioning

confidence: 81%

“…A VRFB with Cr 2 O 3 ‐TGF positive electrode showed a VE and EE of 75.9% and 67.6% at 150 mA cm −2 , which is comparable to the performance of TiO 2 ‐based and NiO‐based electrocatalysts tested at the same current density. [ 115,121 ]…”

Section: All‐vanadium Rfbmentioning

confidence: 99%

Metal and Metal Oxide Electrocatalysts for Redox Flow Batteries

Amini

Gostick

Pritzker

2020

Adv Funct Materials

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“…TiO 2 exhibits rich physical and chemical properties such as non-toxicity, high corrosion resistance, biocompatibility, and unique optoelectronic properties, allowing it to maintain good competitiveness in photocatalysis, sensors, dye-sensitized solar cells, and electrochemical energy storage, etc. [ 5 , 6 , 7 , 8 , 9 , 10 , 11 ]. After decades of development, nanoscale materials (0D, 1D, 2D, and 3D) are becoming key in controlling various performances [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Highly Ordered TiO2 Nanotube Arrays with Engineered Electrochemical Energy Storage Performances

2021

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Nanoscale engineering of regular structured materials is immensely demanded in various scientific areas. In this work, vertically oriented TiO2 nanotube arrays were grown by self-organizing electrochemical anodization. The effects of different fluoride ion concentrations (0.2 and 0.5 wt% NH4F) and different anodization times (2, 5, 10 and 20 h) on the morphology of nanotubes were systematically studied in an organic electrolyte (glycol). The growth mechanisms of amorphous and anatase TiO2 nanotubes were also studied. Under optimized conditions, we obtained TiO2 nanotubes with tube diameters of 70–160 nm and tube lengths of 6.5–45 μm. Serving as free-standing and binder-free electrodes, the kinetic, capacity, and stability performances of TiO2 nanotubes were tested as lithium-ion battery anodes. This work provides a facile strategy for constructing self-organized materials with optimized functionalities for applications.

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“…This is due to the nano-Bi providing more active sites, which in turn promote the redox reaction. The typical metal oxides used include CeO 2 ( Zhou et al, 2014 ), Mn 3 O 4 ( Di Blasi et al, 2017 ), and TiO 2 ( Vázquez-Galván et al, 2019 ). For instance, Wu et al (2014) prepared SbO 2 modified GF by electrodeposition.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Catalysis of P-doped SnO2 for the V2+/V3+ Redox Reaction in Vanadium Redox Flow Battery

Feng

Zhang

et al. 2021

Front. Chem.

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In this work, nanosized P-doped SnO2 (SnO2-P) was prepared by a sol–gel method as a catalyst for the V3+/V2+ redox reaction in vanadium redox flow battery. Compared with SnO2, the electrochemical performance of SnO2-P is significantly improved. This is because P doping provides more active sites and shows greatly improved electrical conductivity, thereby increasing the electron transfer rate. As a result, SnO2-P shows better catalytic performance than SnO2. The SnO2-P modified cell is designed, and it exhibits an increase of 47.2 mA h in discharge capacity and 8.7% in energy efficiency compared with the pristine cell at 150 mA cm−2. These increases indicate that the modified cell has a higher electrolyte utilization rate. This study shows that SnO2-P is a new and efficient catalyst for vanadium redox flow battery.

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High-power nitrided TiO2 carbon felt as the negative electrode for all-vanadium redox flow batteries

Cited by 65 publications

References 72 publications

Metal and Metal Oxide Electrocatalysts for Redox Flow Batteries

Metal and Metal Oxide Electrocatalysts for Redox Flow Batteries

Highly Ordered TiO2 Nanotube Arrays with Engineered Electrochemical Energy Storage Performances

Enhanced Catalysis of P-doped SnO2 for the V2+/V3+ Redox Reaction in Vanadium Redox Flow Battery

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