Pacemakers are electronic devices that help regulate the heart rate. currently, lithium-iodine cells are commonly used to power
pacemakers and have replaced zinc-mercury cells. table 1 provides the operating cell potential, e, for each cell. table 2 provides the standard reduction potentials for several half-reactions related to zinc-mercury and zinc-air cells.
The major difference is that the operating potential of the lithium-iodine cell indicates its' cell reaction is more thermodynamically favorable.
<h3>What is the difference in cell potential?</h3>
The Zinc-Mercury Cell reaction is; Zn + HgO = ZnO + Hg. It also has long storage life and stable voltage(1.35V).
The major difference between the zinc-mercury cell and the lithium-iodine cell is that during the initial cell operation, each reaction is thermodynamically favorable, but the larger operating potential of the lithium-iodine cell indicates that its cell reaction is more thermodynamically favorable.
