Pressure drop through platinized titanium porous electrodes for cerium‐based redox flow batteries

Arenas, Luis F.; León, Carlos Ponce de; Walsh, Frank C.

doi:10.1002/aic.16000

Cited by 42 publications

(33 citation statements)

References 50 publications

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“…The mean linear electrolyte flow velocity past the surface of the electrode is calculated based on literature, 38 which is equal to 1.74 cm s −1 . The graphite felts were activated and pretreated by heat treatment for 5 hours at a temperature of 500°C in order to enhance its electrochemical reactivity and hydrophilicity.…”

Section: Icrfb Single-cell Testmentioning

confidence: 99%

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Investigation of Nafion series membranes on the performance of iron‐chromium redox flow battery

Sun

Zhang

2019

Int J Energy Res

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Summary To boost the performance of the iron‐chromium redox flow battery (ICRFB), opting an appropriate proton exchange membrane (PEM) as the core component of ICRFB is of great importance. For the purpose, in this paper, various widely adopted commercial Nafion membranes with a different thickness of 50 μm (Nafion 212, N212), 126 μm (N115), and 178 μm (N117) are chosen for the sake of evaluating the influence of membrane thickness on the ICRFB single‐cell performance. Physicochemical properties, electrolyte utilization, cell efficiency, long‐term cycling stability, and the self‐discharge process of ICRFBs based on a series of Nafion membranes are contrasted comprehensively. The cycling test of ICRFBs is carried out under the current density range of 40 to 120 mA/cm2 for the charge‐discharge process. As a result of the good equilibrium of membrane resistance and electro‐active species permeability, Nafion 212 membrane exhibits the highest electrolyte utilization and energy efficiency during the operation, accompanied by the lowest overpotential. In the final part, the selection of Nafion membrane thickness was optimized on the basis of single‐cell performance and the overall cost of the system.

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Section: Icrfb Single-cell Testmentioning

confidence: 99%

“…The volumic flow rate is 100 mL/min. The mean linear electrolyte flow velocity past the surface of the electrode is calculated based on literature, 38 which is equal to 1.74 cm s −1 . The cell and storage tanks were set in an oven with accurate temperature control.…”

Section: Icrfb Single-cell Testmentioning

confidence: 99%

Investigation of Nafion series membranes on the performance of iron‐chromium redox flow battery

Sun

Zhang

2019

Int J Energy Res

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“…The active solution flows through a magnetic circulating pump with a flow rate of 100 mL Á min −1 (MP-10R, Shanghai Zhiwo pump valve Co. LTD, China). The mean linear electrolyte flow velocity past the surface of the electrode is calculated based on literature, 34 which is equal to 1.74 cmÁs −1 . The entire single cell was situated in a temperature control oven, which may further assure the practical temperature during the single-cell operation was kept at 65 C. The cells were monitored by a CT2001C-5V/2A (Wuhan Land Co., China) chargedischarge tester at the current density of 60 mAÁcm −2 and voltage window between 0.8 and 1.2 V.…”

Section: Electrochemical Measurementsmentioning

confidence: 99%

Investigations on physicochemical properties and electrochemical performance of graphite felt and carbon felt for iron‐chromium redox flow battery

et al. 2020

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Summary In this paper, polyacrylonitrile‐based graphite felt (GF), carbon felt (CF) and the effect of thermal activation on them with or without the catalyst (BiCl3) are comprehensively investigated for iron‐chromium redox flow battery (ICRFB) application. The physical‐chemical parameters of GF and CF after the thermal activation is affected significantly by their graphitization degree, oxygen functional groups, and surface area. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) results manifest that GF and CF before and after the thermal activation have different electrocatalytic activities owing to oxygen functional groups number increase and the graphitization degree decrease. In terms of the capacity decay rate, as oxygen functional groups provide shorter electrocatalytic pathways than bismuth ions, the performance of GF and CF after the thermal activation is more ideal. As a result, GF before and after the thermal activation exhibits higher efficiency (EE: 86%) and better stability at a charge‐discharge current density of 60 mA·cm−2 than those of CF during charge‐discharge cycling, as the dominant limitation in an ICRFB is ohmic and activation polarization. Therefore, GF after thermal activation together with the addition of BiCl3 in the electrolyte is a more promising electrode material for ICRFBs application than CF.

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“…The volumetric mass transfer coefficient, k m A e was as high as 0.1 s −1 at a flow velocity of 12 cm s −1 past the felt, compared to a value of 0.0007 s −1 for the foil under similar conditions. The present authors also characterized the hydraulic characteristic of the same electrodes, as pressure drop over porous electrodes has significant consequences on the energy efficiency of electrochemical reactors …”

Section: Applicationsmentioning

confidence: 99%

Developments in electrode design: structure, decoration and applications of electrodes for electrochemical technology

Walsh

Arenas

León

2018

J of Chemical Tech & Biotech

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The diversity of cell geometries and their use for electrochemical processing and energy conversion are concisely reviewed, updating earlier treatments, with an emphasis on an engineering approach to electrode design. Electrode size varies from several cm2 in the laboratory to stacks containing hundreds of m2 at the industrial plant scale, and currents can range from nA at laboratory to many 100 kA in industry. Electrode materials include metals, conductive ceramics and polymers, as well as polymer–metal or ceramic–metal composites. Area, electrocatalytic activity and functionality can be tailored by selecting an appropriate support structure‐coating combination. The core structure of porous supports can be a foam, mesh or particulate bed, whereas the surface can be enhanced using numerous techniques. Inspiration for electrode design can come from multiple sources, including biomimetics and technology transfer. Important aspects of electrodes include manufacture, electrochemical activity, active area, the possibilities of 3D and nanostructured surfaces, decoration and functionalization, in addition to reasonable cost and adequate lifetime. The diversity of electrodes is illustrated by examples from the authors' laboratory in the fields of inorganic and organic synthesis, environmental remediation of wastewaters, surface finishing of materials and energy storage/conversion. A forward look is made to potential future developments in electrochemical technology. © 2018 Society of Chemical Industry

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Pressure drop through platinized titanium porous electrodes for cerium‐based redox flow batteries

Cited by 42 publications

References 50 publications

Investigation of Nafion series membranes on the performance of iron‐chromium redox flow battery

Investigation of Nafion series membranes on the performance of iron‐chromium redox flow battery

Investigations on physicochemical properties and electrochemical performance of graphite felt and carbon felt for iron‐chromium redox flow battery

Developments in electrode design: structure, decoration and applications of electrodes for electrochemical technology

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