Slurry spin coating of thin film yttria stabilized zirconia/gadolinia doped ceria bi-layer electrolytes for solid oxide fuel cells

Kim, Hyun Joong; Kim, Manjin; Neoh, Ke Chean; Han, Gwon Deok; Bae, Kwang‐Hee; Shin, Jong Mok; Kim, Gyu Tae; Shim, Joon Hyung

doi:10.1016/j.jpowsour.2016.07.080

Cited by 66 publications

(25 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It suggests the tremendous potential of ZnO from scientific and technological as well as applied perspectives for electrolyte uses. We also note that the performance is comparable to that of a newly reported thin-film SOFC based on YSZ/GDC (Gd-doped CeO 2 ) bi-layer electrolyte [32], and even superior to some other SOFCs using ceria-based electrolytes [33,34]. In the case of the ZnO-LCP cell, a higher OCV of 1.07 V and significantly enhanced power density of 864 mW cm −2 were attained at 550 °C compared to other two cells.…”

Section: Resultssupporting

confidence: 72%

Study on Zinc Oxide-Based Electrolytes in Low-Temperature Solid Oxide Fuel Cells

et al. 2017

View full text Add to dashboard Cite

Semiconducting-ionic conductors have been recently described as excellent electrolyte membranes for low-temperature operation solid oxide fuel cells (LT-SOFCs). In the present work, two new functional materials based on zinc oxide (ZnO)—a legacy material in semiconductors but exceptionally novel to solid state ionics—are developed as membranes in SOFCs for the first time. The proposed ZnO and ZnO-LCP (La/Pr doped CeO2) electrolytes are respectively sandwiched between two Ni0.8Co0.15Al0.05Li-oxide (NCAL) electrodes to construct fuel cell devices. The assembled ZnO fuel cell demonstrates encouraging power outputs of 158–482 mW cm−2 and high open circuit voltages (OCVs) of 1–1.06 V at 450–550 °C, while the ZnO-LCP cell delivers significantly enhanced performance with maximum power density of 864 mW cm−2 and OCV of 1.07 V at 550 °C. The conductive properties of the materials are investigated. As a consequence, the ZnO electrolyte and ZnO-LCP composite exhibit extraordinary ionic conductivities of 0.09 and 0.156 S cm−1 at 550 °C, respectively, and the proton conductive behavior of ZnO is verified. Furthermore, performance enhancement of the ZnO-LCP cell is studied by electrochemical impedance spectroscopy (EIS), which is found to be as a result of the significantly reduced grain boundary and electrode polarization resistances. These findings indicate that ZnO is a highly promising alternative semiconducting-ionic membrane to replace the electrolyte materials for advanced LT-SOFCs, which in turn provides a new strategic pathway for the future development of electrolytes.

show abstract

Section: Resultssupporting

confidence: 72%

Study on Zinc Oxide-Based Electrolytes in Low-Temperature Solid Oxide Fuel Cells

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Result recorded as 500 mW cm -2 at 800°C and at 0.7 V, with high fuel utilization (75%). Kim et al 110 fabricated the thin-film ceramic bi-layered electrolyte through slurry spin coating method encompassing YSZ and gadolinia doped ceria (GDC). Lin et al 108 produced thin film of YSZ electrolyte, which the main parameter studied was electrolyte thickness with the aim to reduce the resistivity of YSZ even in lower temperature.…”

Section: Progress Work From 2015 To 2017 On Ysz Electrolytementioning

confidence: 99%

A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

et al. 2019

View full text Add to dashboard Cite

Solid Oxide Fuel Cells (SOFCs) are an electrochemical energy converter that receives the world's attention as a power generation system of the future owing to its flexibility to consume various types of fuels, low emission of greenhouses gases, and having high efficiency reaching over 70%. A conventional SOFCs operates at high temperature, typically ranges between 800 to 1000°C. SOFCs use yttria-stabilized zirconia (YSZ) as the electrolyte, which exhibits excellent oxide ion conductivity in this temperature range. However, this temperature range poses an issue to SOFCs durability, as it leads to the degradation of the cell components. In addition, SOFCs application is limited and difficult to implement for the transportation sector and portable appliance. A viable solution is to lower the SOFCs operating temperature to intermediate (600 to 800°C ) or low (<600°C) operating temperature. The benefit of this way, cell durability will improve, as well as other advantages such as facilitates handling, assembling, dismantling, cost reduction, and expanded the SOFCs application. Nonetheless, the key challenge for the issue is finding suitable electrolyte, as YSZ have lower ionic conductivity at low and intermediate temperature range. The aim of this paper is to review the status and challenges in the attempts made to modify YSZ electrolyte within the past decade. The resulting ionic conductivity, microstructure, and densification, mechanical and thermal properties of these 'new' electrolytes critically reviewed. The targeted conductivity of modification of YSZ electrolyte must be exceeded >0.1 S cm -1 to enable high performance of SOFCs power generation systems to be realized for transportation and portable applications. Based on our knowledge, this paper is the first review which focused on the recent status and challenges of YSZ electrolyte towards lowering the operating temperature.

show abstract

“…However, spin coating has gained attention as a method to produce thin layers for SOFCs, which can be used for layer depositions for both electrolyte-and anode-supported cells [10][11][12][13][14][15][16][17][18][19]. Such technique is based on the deposition by rotation in which a suspension is spread across the surface of a substrate by a centrifugal acceleration.…”

Section: Introductionmentioning

confidence: 99%

“…Such technique is based on the deposition by rotation in which a suspension is spread across the surface of a substrate by a centrifugal acceleration. It is a widely used technique in the electronic industry, in microlithography for the manufacture of integrated circuits and for fabrication of antireflective coatings in solar cells [10][11][12][13][14][15][16][17][18][19]. Spin coating has been successfully developed to fabricate both porous electrode layers and dense electrolyte films for anode supported SOFCs, evidencing the suitability of such deposition technique [10][11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Optimization of spin-coated electrodes for electrolyte-supported solid oxide fuel cells

et al. 2017

View full text Add to dashboard Cite

Electrodes for electrolyte-supported solid oxide fuel cells (SOFC's) were fabricated by spin coating. Strontium-doped lanthanum manganite (LSM) cathode and nickel yttria-stabilized zirconia cermet anodes were synthesized and processed for enhanced deposition conditions. The influence of electrode microstructural parameters was investigated by a systematic experimental procedure aiming at optimized electrochemical performance of single cells. Polarization curves showed a strong dependence on both electrode thickness and sintering temperature. By a systematic control of such parameters, the performance of single cells was significantly enhanced due to decreasing of polarization resistance from 26 Ω cm² to 0.6 Ω cm² at 800°C. The results showed that spin-coated electrodes can be optimized for fast and cost effective fabrication of SOFCs.

show abstract

Slurry spin coating of thin film yttria stabilized zirconia/gadolinia doped ceria bi-layer electrolytes for solid oxide fuel cells

Cited by 66 publications

References 53 publications

Study on Zinc Oxide-Based Electrolytes in Low-Temperature Solid Oxide Fuel Cells

Study on Zinc Oxide-Based Electrolytes in Low-Temperature Solid Oxide Fuel Cells

A review on recent status and challenges of yttria stabilized zirconia modification to lowering the temperature of solid oxide fuel cells operation

Optimization of spin-coated electrodes for electrolyte-supported solid oxide fuel cells

Contact Info

Product

Resources

About