Page 287 - High Temperature Solid Oxide Fuel Cells Fundamentals, Design and Applications

264 High Temperature Solid Oxide Fuel Cells: Fundamentals. Design and Applications

a) A

8
Electrolyte
.

0 t POSlTION
0 POSITION

"4
I
to--+
I
A n o h &e

H, + O--+
%O, + 2e- + 0-
H,O + 2e-

A n o h c t z e

MO, + 2e- + 0-
H,O + 2e-
Figure 10.2 (a) Potential through theelectrode-supportedcell with no current and (b) through a cell with a
current load. (c) The potential across the electrolyte at the 'reference' electrode position (thick line) and
through the cellpart with the current load (thin line). It is seen that: (Vref- V*)/i = Rp.anode + Rp,cathode + Relyt
= the totalpolarisation of thecell apartfrom concentrationpolarisation.