Sintered SOFC electrode

fuel cell can be controlled

through

heat transfer from the extended edges of the separator plate to the oxidant. Patent numbs: US 5906898 Publication date: 25 May Inventor: J.M. Pondo

Heat-resistant for SOFCs

1999

Applicant:

chromium, 0.001-0.20 wt% silicon, carbon,
Solid electrolyte Mitsubishi Ltd,

Power

SOFC electrode Siemens

Corporation,

Heavy

Japan

The patent describes a flat-plate solid membrane electrolyte fuel cell in which fuel gas is introduced through a port formed along nearly the whole length of one side of the

USA

electrode. Both the underlayer and the overlayer comprise a combination of electrode metal such as nickel, and stabilised zirconia such as yttria-stabilised zirconia, with the overlayer comprising a greater percentage of metal. The use of more zirconia in the underlayer good adhesion to the fuel

cell electrolyte, while the use of more electrode metal in the overlayer provides good electrical conductivity. The sintered fuel electrode is less expensive to produce compared with

with port also side.

Air is introduced through a port about half the length of the side which is formed along one of the other sides on the fuel gas introduction port side, while the air discharge port is formed on the side

characteristics, including good porosity, adhesion, electrical conductivity and freedom from degradation. Patent number: US 5908713 Publication he: 1 June 1999 R.J. R&a,

K.A. Warner

Elements with improved water handling Applicant:

California

Technology,

USA

Institute

part of the fuel cell

of

New fuel cell components for use in liquid feed fuel cell systems are described. The components include biplates and endplates, and allow high-efficiency operation. Conductive elements and a wicking

Patent

number:

Siemens Corporation,

WO

99127599

Publication date: 3 June 1999 Inventors: W.A. Fuglevand, S.I. Bayyuk, G.A. Lloyd, ED. Devries, D.R. Lott, J.E Scartozzi, G.M. Somers,

Power

dried. An overlayer is applied to the underlayer and also dried. The dried underlayer and overlayer are then sintered to form a fuel

Inventors:

also form

components described. Patent number: WO 99127590 Publication date: 3 June 1999 Inventors: A. Kindler, A. Lee

Applicant:

Westinghouse

In this patent a solid oxide fuel cell fuel electrode is produced by a sintering process. An underlayer is applied to the electrolyte in the form of a slurry, which is then

electrode stabilised provides

device

Cover/start-up for SOFC

conventional electrodes made by electrochemical vapour deposition processes. The sintered electrodes exhibit favourable performance

fuel cell

cell on the fuel electrode side, the exhaust passing through a on the opposite side that is nearly the whole length of the

port

F. Nanjo

Sintered

steel

cells, for example connector plates for collecting electrical current from a solid oxide fuel cell. The steel consists of 18-28.5 wt%

Industries

the air introduction

over a length of about half the side, at a position close to the fuel gas exhaust port. Patent number: WO 99126304 Publication date: 27 May 1999 Inventor:

Applicant: Ceramic Fuel Cells Ltd, Australia A steel composition is described which is particularly useful for components of solid oxide fuel

Applicant:

opposiite

R.G.

Stokes

gas supply Westinghouse

low-cost, lightweight fuel cell elements

USA

Applicant:

California

Technology,

USA

Institute

of

A cover and startup gas supply system for a solid oxide fuel cell power generator is described. Hydrocarbon fuel - such as natural gas or diesel fuel - and oxygen-

New fuel cell elements for use in liquid feed fuel cells are described. The elements - including biplates and endplates - are low in cost,

containing gas are supplied to a burner. Combustion gas exiting the burner is cooled prior to delivery to the solid oxide fuel cell. The system

light in weight, and allow highefficiency operation. The fuel cell elements also feature electrically conductive elements.

mixes the combusted hydrocarbon fuel constituents with hydrogen, which is stored in solid form, to obtain a non-explosive gas mixture.

Patent number: WO 99127601 Publication date: 3 June 1999 Inventor: A. Kindler

The system may be used to provide both non-explosive cover gas and hydrogen-rich start-up gas to the fuel cell. Patent number: WO 99127598 Publication date: 3 June 1999 Inventors:

I? Singh,

R.A. George

PEM fuel cell power system Applicant: Avista Labs, USA A proton-exchange membrane (PEM) fuel cell power system for producing electrical power is described. The system includes multiple discrete with at least

fuel cell modules two membrane

electrode diffusion assemblies; a pair of currenr collectors individually disposed in juxtaposed ohmic electrical contact with opposite sides of the membrane electrode diffusion assemblies; and individual force apphcation assemblies to apply a given force to the pair of current collectors and the individual membrane electrode diffusion assemblies. The system also includes an enclosure mounting multiple sub-racks which receive the discrete fuel cell modules. The patent also describes a control system which optimises the performance parameters of the discrete PEM fuel cell modules.

!

Fuel Cells Bulletin No. 11