Gas diffusion electrode for PEM cells

Gas diffusion electrode for PEM cells

Producing gaseous fuel for fuel cells Applicants; Nippon Petroleum Energy A process First higher with 5 ppm will a sulfur its sulfur into...

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Producing

gaseous fuel for fuel cells

Applicants;

Nippon

Petroleum

Energy

A process

First

higher

with

5 ppm

will a sulfur

its sulfur

into

catalyst,

to provide

contact

with

copper:nickel

ratio by weight

20:80,

and

at least

A1,03,

ZnO

copper

and

one

desulfurising

old fuel cells.

is then

80:20

total

in terms

agent is between

from

content

of metals 40%

of

in the

and 70%

by

weight. Patent

number:

Date:

US 5800798

1 September

Inventors:

Patent

1998

cells, modified

costs, power

output,

emission.

the

Power

membrane

interposed

between

comprises

a pair

electrode

of electrodes

membrane.

area

separator

reactant

Forskningscenter

coolant

Vanadium

doping

high-temperature

electrical

properties. about

Specimens

2 mol%

for

than

2-8

theoretical

75%

vanadium.

and

hours

density,

for

specimens

The

electrical

with

respectively.

tape-cast

specimens

to achieve with

Date:

nor

containing

vanadium was in lo-l6 and 1 experiments

and

that

of

spray-coated

LaxCaldx

CrO,+V

good

can

adherence

1998

USA

This

invention

method

Inventors:

of operation

Corporation,

New

to a configuration These cells capable of storing where

the

of the carbon

fuel to CO,

use atmospheric

oxygen

feature in

the

and a

for fuel cells that use as fuel

hydrogen,

is the deliberate anode

during

C.Y.

are and

B. Wozniczka,

J.K.K.

occurs.

The

occlusion operation,

of in

only

allow

the water

formed

the reaction

of combustion

leak

and

Current collecting Applicant:

Den

device

norske

stats

as,

Date:

11 September

Inventors:

of

fuel

with

cell

plates

between

each endplate

collector.

The

device from a

connected current

a plate

with

one

Its endplate,

with

a number

of a noble

surface

metal

that

of the associated connection

between

Donaldson

1998 C. Lucas, T. Schwesinger

L.A.

body

J. Yamanis,

based on barium

ceramic

body

is chemically

stable in solid oxide

defined by 0 and 1. The

and dimensionally

where

oxidising

at temperatures

as high

The ceramic to yield

body

a ceramic

expansion

between

11.3 and

12.4~ 10-6/“C,

of

SOFC

other

the adverse

features

make

can the

is

srructural

stacks,

components,

two

Date:

the thus suited

or other such as the

materials,

the

structure

or

support

to a

15 September

to match

especially

gas manifold

or other

adjusted

stress effects. These body

in SOFC

and outflow housing,

material

materials,

thermal

the ceramic

reducing as 1000°C

in which

coefficient

avoiding

non-electrical

operational and

thermal

stack

R.

and strontium

fuel cell (SOFC)

spacers in the stack. Patent number: US 5807642

pressed of grooves

projects

above

and forms

the an

the wires and rhe

1998

Catalysts for direct oxidation fuel cells Applicant: The

Illinois

patent

l? Sundal

electrode for PEM cells Gesellschaft mbH, Germany

fiir

Institute

describes

of Technology,

a catalyst

crystal

cubic platinum,

about

10% osmium.

about

Patent

number:

Date:

17 September E.S.

comprising

cell. The

of the catalyst

65%

Inventors: R. Liu

structure

unit

WO

USA

composition

use in electrochemical reactor devices from platinum, ruthenium and osmium,

percentages

R. Ravnanger,

Xue,

titanates has a composition Ba,.,SrxTiO,, with x between

cenrred

Applicant: Magnet-Motor Magnetmotorische Technik

98139809

(USA)

single-phase

Gas diffusion

WO

Applicants/inventors:

Patent number: US 5804328 Date: 8 September 1998 R. Odegard,

to

sufficient

SOFC stacks with Ba and Sr ceramic bodies

endplate.

Inventors:

during

collector

surface

endplate,

modified

guarantees

A. Koschany,

inflow

Th e patent describes a current collecting for a fuel cell stack. The stack is formed

generally

moisture.

number:

for use as manifolds 01 jeselskap

which

gas and oxidiser

this

Patent

coefficient

complete

as an oxidant.

the

be tailored

1998 Chow,

conditions,

are encountered.

Chan

layer

cathodes hydrogen

8 September

passages.

extending across most of the area of the plate. Wires, held in the grooves, are covered with a

oxidation A design

Date:

electrical relates

carbon compound. any constructed with anodes diffusing

US 5804326

comprises

Trading

York,

stream

number:

agamst

Applicant:

Westfield

the reactant

number

J.D. Carter

is because

atmospheres

Patent

electrodes

This

assembly,

and are isolated

fuel

rhe need to add water

steady.

membrane

electrode

gas diffusion

without

operating

out,

of

PEM

remain

environments,

current

fuel cell

do not superpose

fuel

is inhibited.

under

active area of the adjacent

endplates,

Non-poisoning

At least one one or more

Norway

US 5803934

8 September

Inventor:

less

conducrivity

laminates

number:

more

compared

be sintered onto YSZ with between the two materials. Patent

at

rhe modified

A ceramic

in fluid

(PEM)

in such a way that the diffusion

can be operated

the electrochemically from

with sintered

Preliminary

suggested

its

chemical

were

with 2 mol% La0.76Ca0.24Cr03 measured to be 12 and 30 S/cm atm of 0,,

retaining

of LaxCalexCrO,

of vanadium

1300-1450°C than 92%

while

passages which

an

comprise

passages

Applicant

of LaxCa,_xCrO,,

by

layers

stream

an

have an

defined

contact with one of the electrodes. of the separator layers also features

sinterablhty

layers,

sandwiching

Electrode layer on a solid oxide electrolyte the

assembly,

The electrodes

active

stream

Inc,

the pair of separator

The

cells with

electrodes

membrane

in the electrodes

membrane

Systems

relates to gas diffusion electrolyte

electrodes

Ballard

one or more

to increase

to

1998

electrocatalyst.

has been found

The

retrospectively,

US 5804325

electrochemically

Rise, Denmark

water

Integrated reactant and coolant fluid flow field layer Canada Here

invention

power

0. Yepez

Applicant:

The

existing

be used

8 September

ion exchange

T. Ino, T Seike

the

for polymer

and pollution

also

number:

Inventor:

and

selected

The

volume

Date:

agent in the first alloy with a

carrier

and MgO. nickel

upgrade

a

reduce

Such fuel cells

with

sources in price, operational

with content

greatly

competitive

can

composed

between

be more

lifetime,

a steam-reforming

of hydrogen. The desulfurising step comprises a copper-nickel

or

process

kerosene

a fuel gas mainly

eliminate

of the electrocatalyst.

content

is treated

to reduce

or less. The treated

brought

Japan;

a fuel gas for fuel cells is

agent,

to 0.2 Ppm

Ltd,

to

poisoning

Japan

kerosene

than

desulfurising

Co

Center,

of producing

described. not

Oil

order

optimum

composition 25%

for formed with a a faceatomic

are about

ruthenium

and

98140 16 1 1998

Smotkin,

K.L.

Ley,

C.

Pu,

Fuel Cells Bulletin No. 2