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Title: Optimization of thermal oxidation of electrodes for the performance enhancement in all-vanadium redox flow betteries
Authors: Ghimire, Purna Chandra
Schweiss, Rüdiger
Scherer, Günther G.
Lim, Tuti Mariana
Wai, Nyunt
Bhattarai, Arjun
Yan, Qingyu
Keywords: Engineering::Materials
Issue Date: 2019
Source: Ghimire, P. C., Schweiss, R., Scherer, G. G., Lim, T. M., Wai, N., Bhattarai, A., & Yan, Q. (2019). Optimization of thermal oxidation of electrodes for the performance enhancement in all-vanadium redox flow betteries. Carbon, 155, 176-185. doi:10.1016/j.carbon.2019.08.068
Journal: Carbon
Abstract: Thermal oxidation of a graphite felt in air is the most widely used electrode activation method to enhance the performance of a vanadium redox flow battery. It has been reported extensively, but almost all previous studies used individual treatment protocols with only few parameter variations. In this paper, treatment time and temperature were varied systematically along with in-depth physicochemical and electrochemical analysis. Prolonged treatment time is chosen for oxidation at lower temperatures aiming at low material loss rates, whereas shorter periods are applied at higher treatment temperatures, which are associated with elevated material loss. Among the electrodes treated with various protocols, the best performance is observed with electrodes oxidized at 750 C for 5 min. This study is important for both, reproducibly preparing samples at lab scale as well as commercial developers, where optimized and cost-effective pretreatment plays a significant role.
ISSN: 0008-6223
DOI: 10.1016/j.carbon.2019.08.068
Rights: © 2019 Elsevier. All rights reserved. This paper was published in Carbon and is made available with permission of Elsevier.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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