Antimony-doped tin oxide as an efficient electrocatalyst toward the VO2+/VO2+ redox couple of the vanadium redox flow battery

Yang Lv; Chunmei Yang; Haining Wang; Jin Zhang; Yan Xiang; Shanfu Lu

doi:10.1039/c9cy01793c

Antimony-doped tin oxide as an efficient electrocatalyst toward the VO²⁺/VO₂⁺ redox couple of the vanadium redox flow battery

Yang Lv
, Chunmei Yang
, Haining Wang
, Jin Zhang
, Yan Xiang^*
, Shanfu Lu

^*Corresponding author for this work

School of Energy and Power Engineering

Beihang University

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

The low electronic conductivity of metallic oxides limits their electrocatalytic activity toward the VO²⁺/VO₂⁺ redox reaction in a vanadium redox flow battery (VRFB). In this work, antimony-doped tin oxide (ATO) nanoparticles achieve higher electronic conductivity than tin dioxide nanoparticles. In addition, the doped Sb(v) enhances the negative charge on the surface of the SnO₂, which contributes to adsorption of vanadium ions on the ATO surface. As a result, the reversibility of the VO²⁺/VO₂⁺ redox reaction on ATO is much better than that on SnO₂. The energy efficiency of the VRFB with optimized ATO nanoparticle loading on graphite felts is improved to 73.09% in comparison with that with pristine graphite felt (61.00%) or SnO₂ nanoparticle-coated graphite felt (65.47%) at 300 mA cm^-2. Thus, ATO nanoparticle-coated graphite felt is a desirable positive electrode for VRFB applications.

Original language	English
Pages (from-to)	2484-2490
Number of pages	7
Journal	Catalysis Science and Technology
Volume	10
Issue number	8
DOIs	https://doi.org/10.1039/c9cy01793c
State	Published - 21 Apr 2020

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10.1039/c9cy01793c

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title = "Antimony-doped tin oxide as an efficient electrocatalyst toward the VO2+/VO2+ redox couple of the vanadium redox flow battery",

abstract = "The low electronic conductivity of metallic oxides limits their electrocatalytic activity toward the VO2+/VO2+ redox reaction in a vanadium redox flow battery (VRFB). In this work, antimony-doped tin oxide (ATO) nanoparticles achieve higher electronic conductivity than tin dioxide nanoparticles. In addition, the doped Sb(v) enhances the negative charge on the surface of the SnO2, which contributes to adsorption of vanadium ions on the ATO surface. As a result, the reversibility of the VO2+/VO2+ redox reaction on ATO is much better than that on SnO2. The energy efficiency of the VRFB with optimized ATO nanoparticle loading on graphite felts is improved to 73.09\% in comparison with that with pristine graphite felt (61.00\%) or SnO2 nanoparticle-coated graphite felt (65.47\%) at 300 mA cm-2. Thus, ATO nanoparticle-coated graphite felt is a desirable positive electrode for VRFB applications.",

author = "Yang Lv and Chunmei Yang and Haining Wang and Jin Zhang and Yan Xiang and Shanfu Lu",

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year = "2020",

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T1 - Antimony-doped tin oxide as an efficient electrocatalyst toward the VO2+/VO2+ redox couple of the vanadium redox flow battery

AU - Lv, Yang

AU - Yang, Chunmei

AU - Wang, Haining

AU - Zhang, Jin

AU - Xiang, Yan

AU - Lu, Shanfu

PY - 2020/4/21

Y1 - 2020/4/21

N2 - The low electronic conductivity of metallic oxides limits their electrocatalytic activity toward the VO2+/VO2+ redox reaction in a vanadium redox flow battery (VRFB). In this work, antimony-doped tin oxide (ATO) nanoparticles achieve higher electronic conductivity than tin dioxide nanoparticles. In addition, the doped Sb(v) enhances the negative charge on the surface of the SnO2, which contributes to adsorption of vanadium ions on the ATO surface. As a result, the reversibility of the VO2+/VO2+ redox reaction on ATO is much better than that on SnO2. The energy efficiency of the VRFB with optimized ATO nanoparticle loading on graphite felts is improved to 73.09% in comparison with that with pristine graphite felt (61.00%) or SnO2 nanoparticle-coated graphite felt (65.47%) at 300 mA cm-2. Thus, ATO nanoparticle-coated graphite felt is a desirable positive electrode for VRFB applications.

AB - The low electronic conductivity of metallic oxides limits their electrocatalytic activity toward the VO2+/VO2+ redox reaction in a vanadium redox flow battery (VRFB). In this work, antimony-doped tin oxide (ATO) nanoparticles achieve higher electronic conductivity than tin dioxide nanoparticles. In addition, the doped Sb(v) enhances the negative charge on the surface of the SnO2, which contributes to adsorption of vanadium ions on the ATO surface. As a result, the reversibility of the VO2+/VO2+ redox reaction on ATO is much better than that on SnO2. The energy efficiency of the VRFB with optimized ATO nanoparticle loading on graphite felts is improved to 73.09% in comparison with that with pristine graphite felt (61.00%) or SnO2 nanoparticle-coated graphite felt (65.47%) at 300 mA cm-2. Thus, ATO nanoparticle-coated graphite felt is a desirable positive electrode for VRFB applications.

UR - https://www.scopus.com/pages/publications/85086142450

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DO - 10.1039/c9cy01793c

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Antimony-doped tin oxide as an efficient electrocatalyst toward the VO²⁺/VO₂⁺ redox couple of the vanadium redox flow battery

Abstract

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