Film Solid Oxide Fuel Cells Research Articles

ChemInform Abstract: Opportunities and Challenges in Materials Development for Thin Film Solid Oxide Fuel Cells

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Opportunities of ALD for Thin Film Solid Oxide Fuel Cells

In this paper I summarize several recent publications on thin film fuel cells performed at the Rapid Prototyping Laboratory at Stanford University. Reference is also made to the simulation of oxide ion conduction in yttria-stabilized zirconia. During the talk at the 214th ECS meeting, I plan on discussing previously unpublished data as well.

Opportunities and Challenges in Materials Development for Thin Film Solid Oxide Fuel Cells

AbstractSolid oxide fuel cells (SOFCs) are currently the focus of intense investigation given their high chemical‐to‐electrical energy conversion efficiency and low carbon footprint. In this review, the development of thin film SOFCs, sometimes described as ‘micro‐SOFCs', is highlighted and analysed. Opportunities for reduced temperature operation and portable power generation arise from the decreased thickness of the solid electrolyte, as well at the metastable phases and nanoscale‐dependent effects that are a consequence of the reduced temperature of fabrication. Challenges such as enhanced cation diffusion along grain boundaries are; however, also observed, potentially impacting the long‐term stability of these devices. Recent progress achieved in understanding these and other challenges are reviewed and directions for future work identified.

Opportunities of ALD for Thin Film Solid Oxide Fuel Cells

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A Low Operating Temperature Property of Thin Film Solid Oxide Fuel Cell Prepared by RF Sputtering

Solid oxygen fuel cell (SOFC) having yttria-stabilized zirconia (YSZ) electrolyte film thickness of 12-3μm, which was grown on the Ni-YSZ cermet substrate using as the fuel electrode by RF magnetron sputtering, has been studied on the operating property until lower temperature of 700°C. A single SOFC having YSZ electrolyte film thickness of 3μm could be well operated at 800°C and that could performed the V-I property of 700mV-300mA/cm2 indicating the development index of the cell. The open circuit voltage (OCV) of the cell gave nearly the same value as the theoretical electromotive force. However, the OCV drop became larger as making thin YSZ film, because the grain boundary and pore were caused in the film in consequence of a surface roughness on the substrate. The voltage drop of the cell was mainly occupied by the resistance loss in YSZ film and its percentage increased as the operating temperature decreased. Moreover, the film conductivity at the operating temperature of 800°C became smaller by two figures than the theoretical conductivity of the bulk electrolyte.

Doped Lanthanum Gallate Film Solid Oxide Fuel Cells Fabricated On a Ni/YSZ Anode Support

A colloidal deposition without any binder was developed to prepare a dense La0.8Sr0.2Ga0.85Mg0.15O3−δ (LSGM) film on porous NiO/YSZ substrates, using an incompletely crystallized LSGM powder as starting material. Both the dense LSGM film with a thickness of 15 μm and the required phase composition of the LSGM were achieved simultaneously by sintering at 1400°C for 6 h. The conductivity of the supported LSGM film attained 0.102 S/cm at 800°C, which was comparable with those of the self‐supported LSGM films. The maximum power density of the LSGM film cell was 480 at 800°C and 614 mW/cm2 at 850°C, respectively.

Thin Film Solid Oxide Fuel Cell (SOFC) for Intermediate Temperature Operation (700°C)

Thin Film Solid Oxide Fuel Cell (SOFC) for Intermediate Temperature Operation (700°C)

Thin Film Solid Oxide Fuel Cells with ZrO2– and CeO2-Based Electrolytes

Thin film solid oxide fuel cells (SOFC) were fabricated using plasma spraying and RF-ion plating methods. The NiO electrode and stabilized zirconia (YSZ) films were plasma-sprayed onto a porous alumina substrate. The open circuit voltage (OCV) and maximum power were 0.9 V and 260 mW · cm−2 for a single cell, respectively. The fuel cell with a ceria-based electrolyte exhibited higher output power than that with a YSZ electrolyte. The open circuit voltage of ceria-based SOFC could be improved by coating YSZ thin film on the electrolyte at the fuel side, since the reduction of ceria with H2 was suppressed.