Page 303 - Lindens Handbook of Batteries

BUTTOn CELL BATTErIES: SILVEr OxIDE–ZInC AnD ZInC-AIr SYSTEmS 13.9

0.6

0.5 KOH
Conductivity, Ω –1 cm –1 0.4 NaOH

0.3

0.2

0.1

0
0 10 20 30 40 50
Concentration, %
FiGURE 13.7 Specific conductivity of alkaline hydroxide solutions.
Solid line: 25°C, ref. 5; dotted line: 15°C, ref. 6.

100
KOH

80
NaOH
Efficiency, % 60

40

20

0
20 50 100 200 500 1000
Hourly discharge rate
FiGURE 13.8 Dependence of discharge efficiency on discharge rate
of zinc/silver oxide button battery at 20°C.

3. not oxidized by the solid silver oxide or dissolved silver ions
4. retards the migration of dissolved silver ions to the anode
Because of the slight solubility of silver (I) oxides in alkaline electrolyte, little work was done with
zinc/silver oxide cells until 1941 when André suggested the use of a cellophane barrier. Cellophane
22