Characterization of carbon felt electrodes for vanadium redox flow batteries – A pore network modeling approach
نویسندگان
چکیده
منابع مشابه
A Numerical Simulation of Vanadium Redox Flow Batteries
The recent penetration of renewable sources in the energy system caused a transformation of the needs of the distribution system and amplified the need of energy storage systems to properly balance the electricity grid. Among electrochemical energy storage devices, all vanadium flow batteries are those of the most promising technologies due to their high efficiency, long lifetime, reliability a...
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Traditional vanadium batteries use pure sulfuric acid as electrolyte, but H2SO4 does not absorb enough vanadium ions to make the electrolyte an efficient energy source. This study investigates the effect of hydroxylation process on electrochemical and operational properties of carbon felt electrode in VOSO4 solution with an optimized supporting electrolyte (a mixture of six parts HCl and 2.5 pa...
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The effects of surface treatment combining corona discharge and hydrogen peroxide (H2O2) on the electrochemical performance of carbon felt electrodes for vanadium redox flow batteries (VRFBs) have been thoroughly investigated. A high concentration of oxygen functional groups has been successfully introduced onto the surface of the carbon felt electrodes by a specially designed surface treatment...
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This paper examines vanadium chloride solutions as electrolytes for an all-vanadium redox flow battery. The chloride solutions were capable of dissolving more than 2.3 M vanadium at varied valence states and remained stable at 0-50 °C. The improved stability appeared due to the formation of a vanadium dinuclear [V(2)O(3)·4H(2)O](4+) or a dinuclear-chloro complex [V(2)O(3)Cl·3H(2)O](3+) in the s...
متن کاملGraphite oxide - based graphene materials as positive electrodes in vanadium redox flow batteries
Two graphene materials, TRGO-1 and TRGO-2, prepared by the thermal exfoliation/reduction at 1000oC of two graphite oxides with different characteristics, are investigated as positive electrodes in a Vanadium Redox Flow Battery (VRFB). A detailed study of their electrochemical response towards the [VO2]/[VO] redox system is carried out through cyclic voltammetry, electrochemical impedance spectr...
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ژورنال
عنوان ژورنال: Journal of Energy Storage
سال: 2019
ISSN: 2352-152X
DOI: 10.1016/j.est.2018.11.014