Page 289 - High Temperature Solid Oxide Fuel Cells Fundamentals, Design and Applications

266 High Ternperaturi, Solid Oxidr Fuel Cells: Funclarnentals, Design and Applications

Spring loaded rod Weight loaded rod
Counterelectrode

- hi fclt current collector Elcctrolyte pcllet
Working
1 electrode
- Referenu! electrode
Reference electrode
Working electrodes
- Flectrolyte pellet
Ni mesh
Reference electrode
Counterelectrode
J-. . -- Electrolyte pellet
-
~
Reference gap

Weight load
Platinum wires
Platinum wres
Working electrode - Unwtercd LSM tape
Reference electrode r' r , Working elcctrode
Reference electrode
,--
7 I I I - ,- Electrolyte pellet
Electrolyte pellet

Counter electrode I , Counter electrode
Alumina support Alumina \upport
7L-1 ~

Figure 10.3 Possible threr-rlrctrodr srt-ups based on a cylindrical YSZ electrolyte pellet. The pellet is
niountedon an alumina tube. (A) and (H) illustrate matrrialchoicrs anddetails suitable for anode studies and
(C) and (D) likewisr for cathode studies. Using two three-electrodepelletspressed against a common Ni mrsh
as depicted in (B), one may eliminatr the impedance due to gas conversion. (C) In thr case ofa wry wrl1
conducting electrode material, thc current ispicked up directly from the working electrode using a Pt bead. (U)
In the c'use of a not-so-well conducting electrode, an improved current pick-up may be obtained by an
unsinterrd LSMfoilincontact withadense, channeled LSMpellet[36.40].