The University of Southampton
University of Southampton Institutional Repository

Lignin as redox-targeted catalyst for the positive vanadium electrolyte Electrochemistry Communications

Lignin as redox-targeted catalyst for the positive vanadium electrolyte Electrochemistry Communications
Lignin as redox-targeted catalyst for the positive vanadium electrolyte Electrochemistry Communications
Vanadium Redox Flow Batteries (VRFBs) are promising candidates for large- scale energy storage applications however, there are still some obstacles that need to be overcome such as their low energy density (25-30 Wh L-1 for a 1.8 M electrolyte), high cost and large environmental impact due to corrosiveness and the unsustainability of vanadium. To address these challenges, we introduce lignin as a low-cost electrocatalyst and capacity booster for the positive electrolyte. Coated on a glassy carbon electrode, lignin showed electrocatalytic abilities and improved the electrochemical reversibility of the VO2+/ redox couple significantly. In charge and discharge cycles volumetric capacities of 28 Ah L-1 (charge) and 23.5 Ah L-1 (discharge) were achieved with a 0.9 M concentrated vanadium electrolyte which surpassed the maximum theoretical capacity of 24.1 Ah L-1 in the charge. This demonstrates an increase of 7.5 Ah L-1 and 9 Ah L-1 for the charge and discharge cycles, respectively, compared to a pristine carbon felt electrode. This work showcases the noteworthy influence of lignin on vanadium and opens new possibilities for VRFB chemistry.
electrocatalyst, energy storage,, ignin,, redox-targeting,, vanadium
1388-2481
Berling, Sabrina
32b190e4-6513-41d1-9bb3-538a44c809bb
Mavrikis, Sotirios
6b5b53fb-a664-4c2e-b17d-5c27850d6ea9
Patil, Nagaraj
180b6dc7-1d6b-4756-82c6-ca267576d9f9
Garcia - Quismondo, Enrique
a69eb1b0-78ce-4edb-8448-f5b0f338448f
Palma, Jesus
b528a148-1036-405d-ad52-b8dd5e4224ff
Ponce De Leon Albarran, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Berling, Sabrina
32b190e4-6513-41d1-9bb3-538a44c809bb
Mavrikis, Sotirios
6b5b53fb-a664-4c2e-b17d-5c27850d6ea9
Patil, Nagaraj
180b6dc7-1d6b-4756-82c6-ca267576d9f9
Garcia - Quismondo, Enrique
a69eb1b0-78ce-4edb-8448-f5b0f338448f
Palma, Jesus
b528a148-1036-405d-ad52-b8dd5e4224ff
Ponce De Leon Albarran, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c

Berling, Sabrina, Mavrikis, Sotirios, Patil, Nagaraj, Garcia - Quismondo, Enrique, Palma, Jesus and Ponce De Leon Albarran, Carlos (2022) Lignin as redox-targeted catalyst for the positive vanadium electrolyte Electrochemistry Communications. Electrochemistry Communications. (doi:10.1016/j.elecom.2022.107339).

Record type: Article

Abstract

Vanadium Redox Flow Batteries (VRFBs) are promising candidates for large- scale energy storage applications however, there are still some obstacles that need to be overcome such as their low energy density (25-30 Wh L-1 for a 1.8 M electrolyte), high cost and large environmental impact due to corrosiveness and the unsustainability of vanadium. To address these challenges, we introduce lignin as a low-cost electrocatalyst and capacity booster for the positive electrolyte. Coated on a glassy carbon electrode, lignin showed electrocatalytic abilities and improved the electrochemical reversibility of the VO2+/ redox couple significantly. In charge and discharge cycles volumetric capacities of 28 Ah L-1 (charge) and 23.5 Ah L-1 (discharge) were achieved with a 0.9 M concentrated vanadium electrolyte which surpassed the maximum theoretical capacity of 24.1 Ah L-1 in the charge. This demonstrates an increase of 7.5 Ah L-1 and 9 Ah L-1 for the charge and discharge cycles, respectively, compared to a pristine carbon felt electrode. This work showcases the noteworthy influence of lignin on vanadium and opens new possibilities for VRFB chemistry.

Text
Lignin as redox-targeted catalyst for the positive vanadium electrolyte - Accepted Manuscript
Available under License Creative Commons Attribution.
Download (2MB)
Text
1-s2.0-S1388248122001412-main (1) - Proof
Download (3MB)
Text
SI_Lignin as a catalyst
Available under License Creative Commons Attribution.
Download (5MB)

More information

Accepted/In Press date: 29 July 2022
e-pub ahead of print date: 2 August 2022
Keywords: electrocatalyst, energy storage,, ignin,, redox-targeting,, vanadium

Identifiers

Local EPrints ID: 469583
URI: http://eprints.soton.ac.uk/id/eprint/469583
ISSN: 1388-2481
PURE UUID: 237f7ed4-6059-4825-b5c3-4094a6e5ccb0
ORCID for Carlos Ponce De Leon Albarran: ORCID iD orcid.org/0000-0002-1907-5913

Catalogue record

Date deposited: 20 Sep 2022 16:44
Last modified: 21 Sep 2022 01:39

Export record

Altmetrics

Contributors

Author: Sabrina Berling
Author: Sotirios Mavrikis
Author: Nagaraj Patil
Author: Enrique Garcia - Quismondo
Author: Jesus Palma

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×