Magnesium/manganese dioxide reserve

Magnesium/Manganese Dioxide Battery. This reserve battery consists of a magnesium anode and a manganese dioxide cathode. - It is activated by pouring an aqueous magnesium perchlorate electrolyte into the cells of the battery, where it is absorbed by the separators. Electrolyte absorption occurs within a few seconds at 0°C or above, but 3 min or more are required at -40°C due to the viscosity of the electrolyte. 

In previous sections of this chapter, magnesium anodes have been considered as replacements for zinc in Leclanche and air-depolarized cells. In sea water-activated reserve batteries, magnesium anodes are coupled with either silver chloride, lead chloride, manganese dioxide or, occasionally,... 

Manganese dioxide—magnesium perchlorate batteries are available in reserve and non-reserve forms. 

Figure 30.24 shows the voltage serv ice curves (43 load) when a 92g manganese dioxide-magnesium perchlorate reserve battery is activated by addition of... 

Figure 30.42 Rate-voltage characteristics of a 60g, 656cm Eagle Richer reserve primary manganese dioxide-magnesium perchlorate battery (lOAh) of dimensions 10.7 x 10xS.6cm, (a) at 52°C (b) at -40 C (Courtesy of Eagle Richer)...

Figure 30.52 shows the capacity retention versus time at two different temperatures for a reserve primary manganese dioxide-magnesium perchlorate battery. 

Manganese dioxide-magnesium perchlorate reserve-type batteries are available from Eagle Picher. 

The advantage of reserve manganese dioxide-magnesium perchlorate batteries is that they can be stored for years in an inactivated condition (that is, longer than the non-reserve type) and require activation with the electrolyte before use. However, unlike the non-reser e type, it is neeessary, onee they... 

Figure 57.2 Discharge curves for an Eagle Picher reserve primary manganese dioxide-magnesium perchlorate battery (6.6 x 6.E x 2.5 cm, 94 g) after activation at -54 and +24 C (Courtesyof Eagle Picher)...

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