
459pH Differential Power Sources with Electrochemical Neutralisation
large concentration gradient across the membrane between acid (or alka-
line) chamber and middle salt chamber, large amounts of
4
2
and K
+
ions
would diffuse into the middle chamber under concentration gradient and
result in the super-saturation of salt. In addition, the low saturation concen-
tration of K
2
SO
4
in water (0.63 M) at room temperature means it will become
super saturated easily. The salting problem can be overcome by using a suit-
able salt with a higher solubility, or apply CEM and AEM with a higher
perm-selectivity.
A salt solution for electrochemical energy generation ...