Institute of Nuclear Energy Research

Institute of Nuclear Energy Research, Atomic Energy Council, Executive Yuan

Institute of Nuclear Energy Research, Atomic Energy Council

Wei-Xin Kao

Tai-Nan Lin

Maw-Chwain Lee

Yang-Chuang Chang

Chun-Hsiu Wang

Hong-Yi Kuo

Chun-Yen Yeh

Ruey-Yi Lee

Yung-Neng Cheng

Szu-Han Wu

Yu-Ming Chen

Li-Fu Lin

Jen-Chen Chang

Rung-Je Yang

Lin-Song Lee

Jen-Yuan Kuo

Ming-Wei Liao

Yi-Jing Wu

Min-Fang Han

Ling-Song Lee

A method of preparation and application for a glass ceramic sealing thin strip with high sealing performance, differing from using conventional glass ceramic packaging paste applied to the junction of the cell stack assembly and connecting plates. The glass ceramic sealing thin strip of present invention utilizes tape casting to produce a single layer or multi-layer stacking in accordance with the required thickness of the glass-ceramic sealing thin strip, and cutting the glass ceramic sealing thin strips from molds in accordance with the geometry of cell stacks with equal thickness of the glass ceramic sealing thin strip for SOFC cell stack assembly, aiming to overcome the setbacks of the conventional dispensing method with glass ceramic packaging paste that makes the thickness difficult to control, and to effectively improve sealing performance of the cell stack assembly and the power generation efficiency, and achieve commercial application with mass production.

Method of preparation and application for glass ceramic sealing thin strips

A membrane electrode assembly structure of a fuel cell and a method of making the same are disclosed. The materials to be used include NiO, 8YSZ and 3YSZ that mixed into a slurry, formed into anodes by tape casting, sintered to form an anode substrate, and followed by forming a thin film of electrolyte layer on the surface of the anode substrate, forming a cathode layer on the outer surface of the electrolyte layer to obtain the membrane electrode assembly, which utilizes the 3YSZ having a tetragonal crystal phase to improve the toughness and mechanical strength of the material of NiO-8YSZ through calcination, thus the thickness of the anode substrate can be reduced, and the fuel gas diffusion path and resistance can be appropriately reduced to enhance the conductivity of the anode substrate.

Membrane electrode assembly structure of fuel cell and the method of fabricating the same

A composite material type oxygen transport membrane and its preparation method are disclosed. The composite material that is an ionic-electronic mixed conducting material having high ionic conductivity is stirred into slurry and formed into a thin strip-shaped green tape substrate through tape casting to obtain a predetermined half-finished substrate, and then sintered to form the half-finished substrate into a conductive function type oxygen ion conducting substrate, followed by choosing small particle shaped highly catalyzed ionic-electronic mixed conducting material to be evenly adhered to at least one side surface of the conductive function type oxygen ion conducting substrate to form a reductive function type oxygen ion conducting layer. The reductive function type oxygen ion conducting layer and the conductive function type oxygen ion conducting substrate are then bonded to produce a composite material type oxygen transport membrane element.

Composite material type oxygen transport membrane

A fabrication process for production of planar type solid oxide fuel cell with high electrical conductivity and low fuel gas impedance is disclosed. It is a tape casting to produce an anode substrate furnished with a pore array structure on one or plurality of layers of the anode green tape on the utmost outside of the anode. It is to implement the process of solid oxide fuel cell membrane electrode assembly (SOFC-MEA) with precision abrasion to remove nickel depleted layer on the anode surface to complete the production of a unit cell. The fabrication of anode with pore array structure provides a good conduction effect for fuel gas and the solid oxide fuel cell with this treatment has features of high electrical conductivity and low fuel gas impedance to improve the performance of SOFC unit cell.

Fabrication process for production of SOFC-MEA with a pore array anode structure for improving output power density

The innovation process describes the process and results for fabrication of a magnetron sputter deposited fully dense electrolyte layer (8YSZ/GDC/LSGM) embedded in a high performance membrane electrolyte assembly (MEA) (Unit Cell) of Solid Oxide Fuel Cell. A single cell with airtight electrolyte layer (8YSZ/GDC/LSGM) is prepared via thin film technique of magnetron sputter deposition, combined with SOFC-MEA processing methods (such as tape casting, lamination, vacuum hot pressing, screen printing, spin coating, and plasma spray coating) and sintering optimization conditions. The gas permeability of the electrolyte layer is below 1&#xd7;10L/cm/sec and the open circuit voltage/power density of the single cell performance test exceeds 1.0 V and 500 mW/cm.

Process for fabrication of a sputter deposited fully dense electrolyte layer embedded in a high performance membrane electrolyte assembly of solid oxide fuel cell

A current collection apparatus and its method of processing for a solid oxide fuel cell, which mainly includes using screen printing process to print conductive adhesive onto the surface of the electrode of solid oxide fuel cell (SOFC), forming a current collection layer with drying process, using an appropriate amount of conductive adhesive to paste a conductive wire onto the current collection layer, forming an adhesion layer through drying, fixing the conductive wire on the electrode surface with an appropriate amount of ceramic adhesive, and forming a fixing layer after baking. A good connection is hence made between metal conductive wire and electrode through current collection layer, not only the interface impedance between electrode and current collection layer can be reduced effectively, but also the output power density of the SOFC unit cell can be enhanced, and stable as well as long term power output can be provided.

Current collection apparatus and method of processing for a solid oxide fuel cell thereof

A method and apparatus for energy conversion cycle based on Solid Oxide Fuel Cell (SOFC) and utilizing COsource (referred to as SOFC-CO-ECC) adopt COas energy sources from waste/stock gas or convert and fix it in the useful compounds. COis converted into CO and Ovia simultaneously catalytic and electrochemical reactions in SOFC for power generation and COcracking. Furthermore, CO is used either as the fuel in SOFC for power generation or starting materials in the chemical reactors to produce CO-derivatives of energy source materials and useful chemical compounds. Hence, SOFC-CO-ECC is an active or scientific carbon cycle with zero emission of CO.

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The present invention provides a measurement process for determination of the optimum contact pressure among components of a solid oxide fuel cell stack in the packaging process in order that the reduction in performance caused by the packaging process can be reduced. The present invention also provides a measurement apparatus which can carry the measurement process out.

Measurement process for determination of the optimum contact pressure among components of a solid oxide fuel cell stack in the packaging process and its measurement apparatus

The present invention is related to producing fine nano or submicron-scale precision ceramic powder by applying an innovative chemical reactor with powder collection to the glycine-nitrate combustion process (GNC-P). The unique feature lies in the utilization of a simple-operating process to massively produce nano or submicron-scale ceramic oxide powder with multiple metal components. The present invention not only provides very high powder collection efficiency and production yield as well as safety but also satisfies requirements of industrial safety and environmental safety, and lowers production cost.

Process to produce fine ceramic powder through a chemical reactor with powder collection device

This invention describes the recipe and preparation process of nano-scale electrolyte suspension and its application via a spin coating process for fabrication of airtight/fully dense electrolyte layers composed in solid oxide fuel cell-membrane electrode assembly with high performance characteristics. The recipe of nano-scale electrolyte suspension includes 10&#x2dc;50 wt % nano-scale electrolyte powder, 0.01&#x2dc;1 wt % poly acrylic acid (PAA as dispersant), 0.1&#x2dc;5 wt % poly vinyl alcohol (PVA as binder), 0.005&#x2dc;1 wt % octanol as defoamer, and deionized water as solvent. Solid oxide fuel cell fabricated via this recipe and process exhibits that the open-circuit voltage (OCV) is over 1 Volt, and maximum power density is 335 mW/cmat 800&#xb0; C.

Formulation of nano-scale electrolyte suspensions and its application process for fabrication of solid oxide fuel cell-membrane electrode assembly (SOFC-MEA)

A recipe and two sequential processes for fabrication of electrode substrates of solid oxide fuel cells (SOFCs) are described in this invention. The typical recipe consists of 50&#x2dc;86 wt % electrolyte (8YSZ) or 50&#x2dc;80 wt % anode electrode (NiO/8YSZ), 12&#x2dc;22 wt % MEK (solvent 1), 5&#x2dc;9 wt % EtOH (solvent 2), 1&#x2dc;2 wt % TEA (dispersant), 0.5&#x2dc;2 wt % DBP (plasticizer 1), 0.5&#x2dc;2 wt % PEG (plasticizer 2), 3&#x2dc;6 wt % PVB (binder), and 0.1&#x2dc;10 wt % graphite (pore former). Two sequential processes include: 1. The process for preparation of the green tape slurry from materials of the recipe, 2. The synergistic process for fabrication of a high integrity membrane electrode assembly (MEA) of SOFC from the prepared electrode substrates.

Synergistic process and recipe for fabrication of a high integrity membrane electrode assembly of solid oxide fuel cell

This invention describes the process for fabrication of a high conductivity and low resistance solid oxide fuel cell. An anode substrate is mainly prepared via tape casting technique and modified by abrasion and polish process. Electrolyte is fabricated onto the polished side by thin film technologies and can attach well in the cross section. Grinding surface of anode side about 10-30 &#x3bc;um after finish of MEA combination can get a high conductivity and low resistance unit cell and enhance cell performance effectively.

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Taoyuan County, Taiwan

Wei-Xin Kao