Ultralow platinum loading for redox-flow battery by electrospinning the electrocatalyst and the ionomer in core-shell fibers

Kobby Saadi; Xiaozong Fan; Samuel S. Hardisty; Peter Pintauro; David Zitoun

doi:10.1016/j.est.2022.106430

Ultralow platinum loading for redox-flow battery by electrospinning the electrocatalyst and the ionomer in core-shell fibers

Kobby Saadi, Xiaozong Fan, Samuel S. Hardisty, Peter Pintauro, David Zitoun

Vanderbilt University

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

4 Scopus citations

Abstract

Hydrogen Bromine Redox Flow Batteries (HBRFB) are promising candidates for large scale energy storage, having an excellent balance of system, inexpensive and abundant electrolytes, high power density and near zero kinetic limitations. However, they suffer from corrosion of the hydrogen electrode due to bromine species crossover, which requires a high loading of precious group metal (PGM) electrocatalyst. Herein, a standard catalyst has been used in an electrospun (ES) fiber mat electrode, allowing for a significant (six-fold) reduction in platinum loading from 0.3 mg_Pt/cm² down to 0.05 mg_Pt/cm². At this very low loading, the electrospun electrode attained an impressive specific power of 11.5 W/mg_Pt, and exhibited excellent durability, with constant power output for 140 charge/discharge cycles. The excellent performance of the electrospun hydrogen electrode is attribute to its unique core-shell nanofiber structure, which improves the stability of the catalyst by preventing bromide species from reaching the catalyst surface.

Original language	English
Article number	106430
Journal	Journal of Energy Storage
Volume	59
DOIs	https://doi.org/10.1016/j.est.2022.106430
State	Published - Mar 2023

Bibliographical note

Publisher Copyright:
© 2022 Elsevier Ltd

Funding

David Zitoun reports financial support was provided by Israel Ministry of Energy. Peter Pintauro reports financial support was provided by US Department of Energy.The fiber electrode fabrication work at Vanderbilt University was funded by the U.S. Department of Energy, Fuel Cell Technologies Office, through the Fuel Cell Performance and Durability (FC-PAD) Consortium (Fuel Cells Program Manager: Dimitrios Papageoropoulos) under DOE contract No. DE-EE0007653. The RFB research at Bar Ilan University was funded by the Israeli Ministry of Energy (MOE) as part of the “Orange Fuel” project (No. 40840001000). The authors gratefully acknowledge Dr. Krysta Waldrop who performed the STEM-EDS measurements with the assistance of Drs. Karren More and David Cullen at Oak Ridge National Laboratory. The fiber electrode fabrication work at Vanderbilt University was funded by the U.S. Department of Energy, Fuel Cell Technologies Office , through the Fuel Cell Performance and Durability (FC-PAD) Consortium (Fuel Cells Program Manager: Dimitrios Papageoropoulos) under DOE contract No. DE-EE0007653. The RFB research at Bar Ilan University was funded by the Israeli Ministry of Energy (MOE) as part of the “Orange Fuel” project (No. 40840001000 ). The authors gratefully acknowledge Dr. Krysta Waldrop who performed the STEM-EDS measurements with the assistance of Drs. Karren More and David Cullen at Oak Ridge National Laboratory.

Funders	Funder number
US Department of Energy.The
U.S. Department of Energy	DE-EE0007653
Oak Ridge National Laboratory
Hydrogen and Fuel Cell Technologies Office
Ministry of Education - Singapore	40840001000
Ministry of Energy, Israel

Keywords

Core/shell
Electrocatalysis
Electrospinning
PGM
Redox-flow batteries

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.est.2022.106430

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title = "Ultralow platinum loading for redox-flow battery by electrospinning the electrocatalyst and the ionomer in core-shell fibers",

abstract = "Hydrogen Bromine Redox Flow Batteries (HBRFB) are promising candidates for large scale energy storage, having an excellent balance of system, inexpensive and abundant electrolytes, high power density and near zero kinetic limitations. However, they suffer from corrosion of the hydrogen electrode due to bromine species crossover, which requires a high loading of precious group metal (PGM) electrocatalyst. Herein, a standard catalyst has been used in an electrospun (ES) fiber mat electrode, allowing for a significant (six-fold) reduction in platinum loading from 0.3 mgPt/cm2 down to 0.05 mgPt/cm2. At this very low loading, the electrospun electrode attained an impressive specific power of 11.5 W/mgPt, and exhibited excellent durability, with constant power output for 140 charge/discharge cycles. The excellent performance of the electrospun hydrogen electrode is attribute to its unique core-shell nanofiber structure, which improves the stability of the catalyst by preventing bromide species from reaching the catalyst surface.",

keywords = "Core/shell, Electrocatalysis, Electrospinning, PGM, Redox-flow batteries",

author = "Kobby Saadi and Xiaozong Fan and Hardisty, {Samuel S.} and Peter Pintauro and David Zitoun",

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year = "2023",

month = mar,

doi = "10.1016/j.est.2022.106430",

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AU - Hardisty, Samuel S.

AU - Pintauro, Peter

AU - Zitoun, David

PY - 2023/3

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N2 - Hydrogen Bromine Redox Flow Batteries (HBRFB) are promising candidates for large scale energy storage, having an excellent balance of system, inexpensive and abundant electrolytes, high power density and near zero kinetic limitations. However, they suffer from corrosion of the hydrogen electrode due to bromine species crossover, which requires a high loading of precious group metal (PGM) electrocatalyst. Herein, a standard catalyst has been used in an electrospun (ES) fiber mat electrode, allowing for a significant (six-fold) reduction in platinum loading from 0.3 mgPt/cm2 down to 0.05 mgPt/cm2. At this very low loading, the electrospun electrode attained an impressive specific power of 11.5 W/mgPt, and exhibited excellent durability, with constant power output for 140 charge/discharge cycles. The excellent performance of the electrospun hydrogen electrode is attribute to its unique core-shell nanofiber structure, which improves the stability of the catalyst by preventing bromide species from reaching the catalyst surface.

AB - Hydrogen Bromine Redox Flow Batteries (HBRFB) are promising candidates for large scale energy storage, having an excellent balance of system, inexpensive and abundant electrolytes, high power density and near zero kinetic limitations. However, they suffer from corrosion of the hydrogen electrode due to bromine species crossover, which requires a high loading of precious group metal (PGM) electrocatalyst. Herein, a standard catalyst has been used in an electrospun (ES) fiber mat electrode, allowing for a significant (six-fold) reduction in platinum loading from 0.3 mgPt/cm2 down to 0.05 mgPt/cm2. At this very low loading, the electrospun electrode attained an impressive specific power of 11.5 W/mgPt, and exhibited excellent durability, with constant power output for 140 charge/discharge cycles. The excellent performance of the electrospun hydrogen electrode is attribute to its unique core-shell nanofiber structure, which improves the stability of the catalyst by preventing bromide species from reaching the catalyst surface.

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Ultralow platinum loading for redox-flow battery by electrospinning the electrocatalyst and the ionomer in core-shell fibers

Abstract

Bibliographical note

Funding

Keywords

UN SDGs

Access to Document

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