Perspective on electrocatalysts and performance hindrances at the negative electrode in vanadium redox flow batteries

Bayeh, Anteneh Wodaje; Kabtamu, Daniel Manaye; Demeku, Aknachew Mebreku; Chen, Guan-Cheng; Wang, Chen-Hao

doi:10.1016/j.est.2024.114026

Journal of Energy Storage

2024

DOI: 10.1016/j.est.2024.114026

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Perspective on electrocatalysts and performance hindrances at the negative electrode in vanadium redox flow batteries

Anteneh Wodaje Bayeh,

Daniel Manaye Kabtamu,

Aknachew Mebreku Demeku

et al.

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Cited by 2 publications

References 118 publications

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Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li₄Ti₅O₁₂/TiO₂ Nanocomposite‐Modified Graphite Felt Electrodes

Huang,

Manaye Kabtamu,

Mebreku Demeku

et al. 2024

ChemElectroChem

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In this study, Li4Ti5O12 (LTO) and TiO2 nanocomposites uniformly were synthesized on the heat‐treated graphite felt through (HGF) hydrothermal and heat treatment methods, denoted by LTO/TiO2@HGF, which LTO/TiO2@HGF acts as effective electrocatalysts to enhance the electrochemical activity in vanadium redox flow battery (VRFB) systems. The cyclic voltammetry (CV) curves of the LTO/TiO2@HGF show higher peak current densities and smaller peak separation than TiO2@HGF, HGF, and pristine graphite felt (PGF) for catalyzing V2+/V3+ and VO₂+/VO2+, indicating superior electrochemical activity of LTO/TiO2@HGF. The VRFB using LTO/TiO2@HGF as the positive and negative electrodes demonstrates an energy efficiency of 82.89 % at 80 mA cm−2. When the VRFB using LTO/TiO2@HGF is applied by a high current density of 200 mA cm−2, it still shows an energy efficiency of 62.22 %. However, the VRFB using PGF cannot perform any performance, and the VRFB using HGF only performs 51.94 %. This improvement can be attributed to the uniform distribution of LTO/TiO2 nanowires on the surface of the graphite felt and the presence of oxygen vacancies on LTO/TiO2, which increased the number of active sites for vanadium ion absorption.

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Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li₄Ti₅O₁₂/TiO₂ Nanocomposite‐Modified Graphite Felt Electrodes

Huang,

Manaye Kabtamu,

Mebreku Demeku

et al. 2024

ChemElectroChem

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High-performance graphite felt electrode loaded with oxygen-vacancy-rich NiWO4 nanowires for vanadium redox flow batteries

Kabtamu,

Su,

Demeku

et al. 2025

Journal of Power Sources

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Perspective on electrocatalysts and performance hindrances at the negative electrode in vanadium redox flow batteries

Cited by 2 publications

References 118 publications

Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li₄Ti₅O₁₂/TiO₂ Nanocomposite‐Modified Graphite Felt Electrodes

Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li₄Ti₅O₁₂/TiO₂ Nanocomposite‐Modified Graphite Felt Electrodes

High-performance graphite felt electrode loaded with oxygen-vacancy-rich NiWO4 nanowires for vanadium redox flow batteries

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Perspective on electrocatalysts and performance hindrances at the negative electrode in vanadium redox flow batteries

Cited by 2 publications

References 118 publications

Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li4Ti5O12/TiO2 Nanocomposite‐Modified Graphite Felt Electrodes

Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li4Ti5O12/TiO2 Nanocomposite‐Modified Graphite Felt Electrodes

High-performance graphite felt electrode loaded with oxygen-vacancy-rich NiWO4 nanowires for vanadium redox flow batteries

Contact Info

Product

Resources

About

Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li₄Ti₅O₁₂/TiO₂ Nanocomposite‐Modified Graphite Felt Electrodes

Enhanced Electrochemical Performance of Vanadium Redox Flow Batteries Using Li₄Ti₅O₁₂/TiO₂ Nanocomposite‐Modified Graphite Felt Electrodes