Fuel cell unit

Fuel cell unit

fuel cell cathode. A probe, which is connected to the cathode, has an anode material that contacts Patent number: WO 99133134 (US 5932146) received ...

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fuel cell cathode. A probe, which is connected to the cathode, has an anode material that contacts

Patent number: WO 99133134 (US 5932146)

received in the notch and recessed edge, so that an electrolyte chamber is formed between the boot

the electrolyte but is separate from the cathode.

Inventors: L. Kuo, R.J. R&a, S. Singhal

and the cathode, and a coolant chamber between

Placement of the anode in the electrolyte generates

the boot and the top frame. The invention includes

electrical power, which is detected by a measuring

an anode which has several integral posts extending through the holes in the boot, where each post has

device connected between the probe and the

a head for securing the boot to the anode, to preclude migration of material between the

allow for testing of discrete areas of the cathode, to

electrolyte and coolant chambers. Also described is

Patent number: US 5916705

a backing plate with multiple holes and a ridge

Publication a!ute: 29 June 1999

extending downwards, where the backing plate

Inventors: D.L. Carter, D.W. Gregg, J.T. Frater

secured between the base and the top frame and

cathode. The probe provides a sealing surface to determine if there are any flaws in its manufacture.

compressive seal. In a moving anode configuration, a spring is located between the backing plate and the housing to maintain a predetermined distance between the anode and cathode, to generate a constant supply of electrical power.

Inventors: D.L. Carter, D.W. Gregg, J.T. Frater, A.F. Lindsay

platinum-zinc

electrode

Applicant: Exxon Research & Engineering Co, USA The patent describes a composition for a carbonsupported, dispersed platinum-zinc alloy with the formula Pt-Zn$,

supporting hollow microfibre-matrix electrolyte. The hollow microfibres have a wall thickness 0.05 and 280 urn.

The hollow microfibres are

arranged in the form of bonded filament or filament yarn fabrics, in which case the ends of the

Fuel cells with integrated H, production

hollow microfibre are bonded so that they are

U.G. Bossel (Switzerland)

Applicantllnventor:

The patent describes a device for converting energy using fuel cells with proton-conducting

dimensionally stable and left partially free to allow a c c e s s t o t h e l u m e n o f t h e h o l l o w fibre. Patent number: WO 99134464 Publication date: 8 July 1999

chamber in which H, gas is produced by reacting

Operating a fuel cell with periodic anode fuel starvation

water with one or more hydrides. The H, gas is

Applicant: Ballard Power Systems Inc, Canada

then transferred into the H, distribution channel for a fuel cell stack. The invention is characterised

A method and apparatus is described for

in that the fuel cells each have an opening, which form the H, distribution channel. The H, gas is

fuel starvation at the anode, either by interrupting the supply of fuel, or periodically

fed into the individual fuel cells via these

introducing pulses of a fuel-free fluid into the

openings. A tension rod for holding the fuel cells

fuel stream. It is believed that such

together in the stack is also located in the

momentary periodic fuel starvation conditions

openings. The invention also relates to a method

cause the anode potential to increase, resulting

in which the H, gas is used as a combustion gas

in the oxidation and removal of electrocatalyst

for the fuel cells.

poisons from the anode electrocatalyst, and

Patent number: WO 99/33133

improving the fuel cell’s performance. In the

Publication date: 1 July 1999

preferred method, while successive localised

production. The device comprises a reaction

29 June 1999

CO-tolerant

The patent relates to a fuel cell unit with a self-

electrolytes and with integrated hydrogen gas

Patent number: US 5916701 Publication dzte:

Fuel cell unit A p p l i c a n t / I n v e n t o r : K. Rennebeck (Germany)

between 0.01 and 50 pm, and a diameter between

holes fit over the posts and are underneath the head, and the ridge contacts the boot to provide a

Publication date: 1 July 1999 (3 August 1999)

with 0.05 < x < 1, with the

platinum present at about 10-40 wt% in the form of particles in the 20-30 A size range on a cabon support, and the carbon in the form of highsurface-area carbon (surface area ranging from about 100 to 500 m*/g). The composition is made by the following process. A soluble zinc source -

portions

from zinc nitrate, acetate, halides, formates,

SOFC air electrode composition

oxalates, acetyl

Applicant: Siemens Westinghouse Power

acetonates and mixtures - is

deposited on the carbon support. This is then

operating a fuel cell with periodic momentary

of

the

fuel

cell

anode

are

momentarily periodically starved of fuel, the remainder of the fuel cell anode remains electrochemically

active

and

saturated

with

ZnO, and the

Corporation, USA An air electrode composition for a solid oxide

zinc oxide is reduced at between about 250°C and

fuel cell is described. The material is based on

6OO”C, in the presence of hydrogen at a pressure between about 1 atmosphere (100 kPa) and 10

lanthanum manganite having a perovskite-like

Patent number: WO 99134465

crystal structure ABO,. The A-site comprises

Pubublication date: 8 July 1999

atmospheres (1000 kPa),

a mixed lanthanide in combination with rare

Inventors: D.P.

powder with Pt/C powder. Finally, the mixture is

earth and alkaline earth

Johannes, J.A. Roberts, J. St-Pierre, C.J. Longley,

heated under a reducing atmosphere at a

comprises Mn in combination with dopants

temperature sufficient to produce the Pt-Znx/C

such as Mg, Al, Cr and Ni. The mixed

alloy. The invention can be used in fuel cells

l a n t h a n i d e c o m p r i s e s L a , C e , Pr a n d (optionally) Nd. The rare earth A-site dopants

calcined to convert the zinc source to

or by admixing zinc

requiring CO-tolerant anodes.

dopants.

The B-site

fuel,

so

that

the

fuel

cell

is

continually

available to generate power.

Wilkinson, C.Y.F.

Chow, E.P.

J.K.K Chan

Fuel cell system for low-pressure operation

Patent number: US 5916702 Publication date: 29 June 1999

preferably comprise La or Nd (or both), while

Applicant: Lynntech Inc, USA

the alkaline earth A-site dopant

Inventors: E. Marucchi-Soos, J.L. Robbins, R.J.

comprises Ca. The use of a mixed lanthanide

A fuel cell design is described for use at low pressure. This invention has a reduced number

Bellows, D.T. Buckley

substantially reduces raw material costs in

of components to reduce fabrication costs, as

comparison

from

well as a simpler design that permits the size of

high-purity lanthanum starting materials. The

the system to be reduced at the same time as performance is being improved. In the design an

Applicant: Lockheed Martin Tactical Defense

amount of A-site and B-site dopants is controlled to provide an air electrode

Systems Inc, USA

composition

thermal

using a common conductive element, which

expansion which closely matches that of the

conducts the current from one cell to the

other SOFC components.

adjacent one. This produces a small and simple

Fuel cell cathode testing device

An

apparatus

is

described

for

testing

the

electrochemical performance of discrete areas of a

with

with

compositions

a

coefficient

preferably

made

of

adjacent anode and cathode pair are fabricated

Fuel Cells Bulletin No. 13