Lowering the co-sintering temperature of cathode–electrolyte bilayers for micro-tubular solid oxide fuel cells

Panthi, Dhruba; Choi, Bokkyu; Du, Yanhai; Tsutsumi, Atsushi

doi:10.1016/j.ceramint.2017.05.003

Cited by 18 publications

(3 citation statements)

References 38 publications

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“…It can be, thus, concluded that the formation of the desired inner framework between LSM particles is initiated within this temperature range. This finding can be utilized in one of recent research approaches in the cell fabrication methods utilizing the oxygen electrode supported SOCs (e.g., LSM and its composite variations) (6). In this case, the inner microstructure formed at 1000 °C shows a promising opportunity for postfabrication modifications, such as grinding or polishing.…”

Section: Resultsmentioning

confidence: 82%

The Impact of Sintering Conditions on the Inner Microstructure of Composites: LSM:YSZ Electrode Case Study

Carda¹,

Budac²,

Paidar³

et al. 2023

ECS Trans.

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The sintering of composite materials can pose a significant challenge if the composite constituents display substantially different melting points and if an intricate inner microstructure is required to be formed by the process. One of such materials represents a LSM:YSZ composite, utilized as an oxygen electrode in the solid oxide cells, where a compromise between particle interconnection and mass transport is essential. Thus, a well-understood development of microstructure during the sintering process is crucial to address these contradictory requirements. LSM:YSZ samples in a form of self-supporting bars and thin layers deposited onto YSZ support were investigated to demonstrate the impact of sintering temperature and the mixture composition on the resulting inner microstructure. Results obtained by means of SEM analysis allow to understand the connection between properties of powder materials precursors and the microstructure of densified bodies with respect to the sintering parameters.

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Section: Resultsmentioning

confidence: 82%

The Impact of Sintering Conditions on the Inner Microstructure of Composites: LSM:YSZ Electrode Case Study

Carda¹,

Budac²,

Paidar³

et al. 2023

ECS Trans.

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“…The multilayer tape cast was put on top of the anode tape cast, and the joined surfaces were compressed by light pressure at room temperature to bond the edges of the rolled tape cast. The co‐firing temperature depends on the densifying temperature of the zirconia‐based electrolyte, which is higher than 1300°C,, but the unfavorable reaction between LSM cathode and electrolyte occurs at over 1200°C . Thus, the cathode was screen printed and sintered after the co‐firing of half cells, including the electrolyte, anode functional layer, and anode support.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of tubular solid oxide fuel cells by solvent‐assisted lamination and co‐firing a rolled multilayer tape cast

Hedayat

Panthi

2017

Int J Applied Ceramic Tech

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This study presents preliminary results for tubular anode-supported solid oxide fuel cells (SOFCs) fabricated by a novel method based on tape casting. A multilayer tape cast was prepared by successive casting of the anode support, anode functional layer, and electrolyte. The tape cast was rolled into a tube, and the ends of the tape were joined by solvent-assisted lamination. The sample was cofired at 1400°C, followed by screen printing and sintering of the cathode at 1150°C. The electrochemical performance of the tubular cell was evaluated in N 2 /

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“…Owing to the fact that sintering temperature of SOFC electrodes is only between 1150 and 1250 ℃, decreasing the electrolyte sintering temperature to this range would result in lower sintering costs and shorter production cycle time. Additionally, the low-temperature sintering of the electrolyte offers further advantages including the prevention of microstructure coarsening of the electrode and suppression of undesirable reactions between the electrolyte and electrode materials [10][11][12][13]. Since conventional multi-step sintering of the SOFC components involves significant time and energy [14], single-step co-firing techniques have recently been proposed [15,16].…”

Section: Introduction mentioning

confidence: 99%

Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes

Panthi

Hedayat

2018

J Adv Ceram

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Yttria-stabilized zirconia (YSZ) is the most common electrolyte material for solid oxide fuel cells. Herein, we conducted a comparative study on the densification behavior of three different kinds of commercial 8 mol% YSZ powders: (i) TZ-8Y (Tosoh, Japan), (ii) MELox 8Y (MEL Chemicals, UK), and (iii) YSZ-HT (Huatsing Power, China). The comparison was made on both the selfsupporting pellets and thin-film electrolytes coated onto a NiO-YSZ anode support. For the pellets, MELox 8Y showed the highest densification at lower sintering temperatures with 93% and 96% of the theoretical density at 1250 and 1300 ℃, respectively. Although YSZ-HT showed a higher sintering rate than TZ-8Y, a sintering temperature of 1350 ℃ was required for both the powders to reach 95% of the theoretical density. For the thin-film electrolytes, on the other hand, YSZ-HT showed the highest sintering rate with a dense microstructure at a co-sintering temperature of 1250 ℃. Our results indicate that besides the average particle size, other factors such as particle size distribution and post-processing play a significant role in determining the sintering rate and densification behavior of the YSZ powders. Additionally, a close match in the sintering shrinkage of the electrolyte and anode support is important for facilitating the densification of the thin-film electrolytes.

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Lowering the co-sintering temperature of cathode–electrolyte bilayers for micro-tubular solid oxide fuel cells

Cited by 18 publications

References 38 publications

The Impact of Sintering Conditions on the Inner Microstructure of Composites: LSM:YSZ Electrode Case Study

The Impact of Sintering Conditions on the Inner Microstructure of Composites: LSM:YSZ Electrode Case Study

Fabrication of tubular solid oxide fuel cells by solvent‐assisted lamination and co‐firing a rolled multilayer tape cast

Densification behavior of yttria-stabilized zirconia powders for solid oxide fuel cell electrolytes

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