One-step fabrication of composite nanofibers for solid oxide fuel cell electrodes

Ahn, Minwoo; Cho, Jiung; Lee, Won Young

doi:10.1016/j.jpowsour.2019.226749

Cited by 32 publications

(16 citation statements)

References 42 publications

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“…Nanoparticle modified nanofibers have been successfully applied in divergent areas such as catalysis [1][2][3], tissue engineering [4], photochemical applications [5][6][7], capacitors [8], energy applications [9], membrane electrodes in fuel cells [10], etc... Fuel cells (FC) are environmentally friendly alternative power sources [11] and until now from solid oxide to microbial FCs various studies have been reported which use the advantage of electrospun polymers [10,[12][13][14][15]. Electrospun polymers exhibit unique electrochemical activity.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the fuel cell performances of TiO2/PAN electrospun carbon-based electrodes

Aslan

2021

Turk J Chem

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Electrocatalytic effect of the untreated and TiO 2 +polyacrylonitrile (PAN) modified discarded battery coal (DBC) and pencil graphite electrodes (PGE) were evaluated in fuel cell (FC) applications. TiO 2 +PAN solution is coated on PGE and DBC electrodes by electrospinning. According to the FESEM and EDS characterizations, TiO 2 and PAN nanofibers are found to be approximately 40 and 240 nm sized. TiO 2 +PAN/PGE showed the best FC performances with 2.00 A cm-2 current density and 5.05 W cm-2 power density values, whereas TiO 2 +PAN/DBC showed 0.68 A cm-2 current density and 0.62 W cm-2 power density values. Electrochemical characterizations of PGE and TiO 2 +PAN/PGE electrodes were investigated by cyclic voltammetry and electrochemical impedance spectroscopy. Finally, long-term FC 2 measurement results of developed electrodes exhibited very reasonable recovery values. Along with the comparison of the electrode performances, the recovery of DBCs as electrodes for renewable energy production has been achieved.

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Section: Introductionmentioning

confidence: 99%

Evaluation of the fuel cell performances of TiO2/PAN electrospun carbon-based electrodes

Aslan

2021

Turk J Chem

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“…Cerium-based oxides are materials of interest in a huge host of applications due to their excellent oxygen storage, ionic conductivity and redox (Ce 4+ /Ce 3+ ) properties, associated with a remarkably high chemical stability in extreme environmental conditions (e.g., corrosive) [1][2][3][4][5][6][7][8]. A list of eminent examples of their uses includes chemical, electrochemical and electromechanical systems [2][3][4][5][6][7][8][9][10][11], catalysis and photocatalysis units [2][3][4]6,[12][13][14][15][16][17][18], biomedical scaffolds [2,[19][20][21], microelectronics and optical devices [2,[22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…Most of the mentioned applications require the processing of materials into the form of porous structures, such as for instance, driven-pressure technologies (e.g., catalytic filters) [9,15,16,[24][25][26][27] or functional components in electrochemical devices (e.g., cathode or three-phase-boundary, TPB) [8,28]. In such applications the porous structure exerts its function, providing either an extended surface area that facilitates the exposure of reaction/active sites [8,9,[25][26][27][28], or an interconnected porous network that promotes the transport and diffusion of the reagents [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…80-90%) [15,16,[25][26][27][28][32][33][34][35][36]. These characteristics along with a high surface-to-volume ratio associated with the 1D structure have been demonstrated to facilitate gas transport and diffusion, enable an efficient exposure of the reaction/active sites, and provide continuous pathways for current collectors [8,15,16,[25][26][27][28][32][33][34][35][36]. In addition, the electrospinning offers the advantages of a versatile approach and an easy control over the chemical compositions [8,15,16,[25][26][27][28][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical Response of Highly Porous Percolative CGO Electrospun Membranes

et al. 2020

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Electrochemical Impedance Spectroscopy (EIS) is here used to characterize highly porous Ce0.9Gd0.1O1.95 (CGO, ca. 90% vol. of porosity) free-supporting nano-fibrous thick (100μm) membranes, fabricated via an electrospinning technique. The investigation of the calcination temperature influence on the microstructure indicates an evolution of the single nanofiber’s microstructure with a gradual grain growth from densely packed polycrystalline to pearl collar-like structures at increasing temperatures. This evolution is accompanied by brittleness for samples treated at temperatures above 800 °C. The electrochemical characterization suggests an ionic percolative conductivity that exploits both the bulk-lattice conduction along the individual nanofibers and interfacial conduction across different nanofibers at their intersections. Optimized membranes treated at 600 and 700 °C exhibit a similar electrochemical bulk response, but different interfacial electrochemical behavior (low frequency) associated with a grain size effect.

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“…It also exhibited extraordinary electronic conductivity compared to that of barium strontium cobalt ferrite (BSCF) that reveals virtuous catalysis for oxygen reduction and is particularly compatible with the ceria carbonate based electrolytes [8][9]. According to previous researchers, SSC based composite cathode is normally used with other ionic conducting ceria based electrolyte, such as gadolinia doped ceria (GDC) and samarium doped ceria (SDC) [10][11]. SDC as composite electrolytes has led to the incorporation of alkaline salts into SDC.…”

Section: Introductionmentioning

confidence: 99%

Effect of SSC Loading and Calcination Temperature on The Phase and Microstructure Formation of SSC-SDCC Cathode

Mohammad¹,

Ahmad²,

Rahman³

et al. 2019

IJIE

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The composite cathode, Samarium strontium cobaltite, Sm0.5Sr0.5CoO3−δ (SSC) and samarium doped ceria, Sm0.2 Ce0.8O1.9 (SDC) carbonate or (SDCC) was developed and scrutinised as for potential cathode materials in solid oxide fuel cell (SOFC) applications. The microstructural and physical characteristics of composite cathode powders have been explored in terms of SSC loading and calcination temperature. SSC-SDCC composite powders were intimately mixed by employing fast high energy ball milling (HEBM) method with three different SSC loadings which includes of 50, 60 and 70 wt. % and subjected to various calcination temperatures from 600°C to 750°C. Subsequently, the calcined cathode powders were then used to fabricate composite pellets using a uniaxial press and undergo sintering process at a temperature of 600°C. Microstructural behavior of the composite cathode powders was examined using X-Ray diffraction (XRD) and Energy Dispersive X-ray Spectroscopy (EDS). The physical properties sintered composite pellets were also investigated from the observation on Scanning Electron Microscopy (SEM). All samples retained their microstructural and physical phase compatibility, with the incorporation of carbonate after various processes. The composite cathode of SSC-SDCC55 with calcination temperature at 750 ºC was chosen to be used as a potential cathode material for LTSFOC performance regarding the optimum chemical and microstructural properties.

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One-step fabrication of composite nanofibers for solid oxide fuel cell electrodes

Cited by 32 publications

References 42 publications

Evaluation of the fuel cell performances of TiO2/PAN electrospun carbon-based electrodes

Evaluation of the fuel cell performances of TiO2/PAN electrospun carbon-based electrodes

Electrochemical Response of Highly Porous Percolative CGO Electrospun Membranes

Effect of SSC Loading and Calcination Temperature on The Phase and Microstructure Formation of SSC-SDCC Cathode

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