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Hybrid redox flow cells with enhanced electrochemical performance via binderless and electrophoretically deposited nitrogen-doped graphene on carbon paper electrodes

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Chakrabarti, Barun Kumar, Feng, Jingyu, Kalamaras, Evangelos, Rubio-Garcia, J., George, Chandramohan, Luo, Hui, Xia, Yuhua, Yufit, Vladimir, Titirici, Maria-Magdalena, Low, Chee Tong John, Kucernak, Anthony and Brandon, Nigel P. (2020) Hybrid redox flow cells with enhanced electrochemical performance via binderless and electrophoretically deposited nitrogen-doped graphene on carbon paper electrodes. ACS Applied Materials & Interfaces, 12 (48). pp. 53869-53878. doi:10.1021/acsami.0c17616

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Official URL: http://dx.doi.org/10.1021/acsami.0c17616

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Abstract

Hybrid redox flow cells (HRFC) are key enablers for the development of reliable large-scale energy storage systems; however, their high cost, limited cycle performance, and incompatibilities associated with the commonly used carbon-based electrodes undermine HRFC’s commercial viability. While this is often linked to lack of suitable electrocatalytic materials capable of coping with HRFC electrode processes, the combinatory use of nanocarbon additives and carbon paper electrodes holds new promise. Here, by coupling electrophoretically deposited nitrogen-doped graphene (N-G) with carbon electrodes, their surprisingly beneficial effects on three types of HRFCs, namely, hydrogen/vanadium (RHVFC), hydrogen/manganese (RHMnFC), and polysulfide/air (S-Air), are revealed. RHVFCs offer efficiencies over 70% at a current density of 150 mA cm–2 and an energy density of 45 Wh L–1 at 50 mA cm–2, while RHMnFCs achieve a 30% increase in energy efficiency (at 100 mA cm–2). The S-Air cell records an exchange current density of 4.4 × 10–2 mA cm–2, a 3-fold improvement of kinetics compared to the bare carbon paper electrode. We also present cost of storage at system level compared to the standard all-vanadium redox flow batteries. These figures-of-merit can incentivize the design, optimization, and adoption of high-performance HRFCs for successful grid-scale or renewable energy storage market penetration.

Item Type: Journal Article
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions: Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Energy storage, Fuel cells, Hydrogen, Vanadium -- Electric properties, Hybrid integrated circuits
Journal or Publication Title: ACS Applied Materials & Interfaces
Publisher: American Chemical Society
ISSN: 1944-8244
Official Date: 2 December 2020
Dates:
DateEvent
2 December 2020Published
18 November 2020Available
27 October 2020Accepted
Volume: 12
Number: 48
Page Range: pp. 53869-53878
DOI: 10.1021/acsami.0c17616
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Copyright Holders: Copyright © 2020 American Chemical Society
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
EP/R023034/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
133462Innovate UKhttp://dx.doi.org/10.13039/501100006041
UF160573[RS] Royal Societyhttp://dx.doi.org/10.13039/501100000288
UNSPECIFIEDShanghai Jiao Tong Universityhttp://dx.doi.org/10.13039/501100004921

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