Negative plates pore structure

Evolution of Pore Structure of Negative Plates During Formation... 

In one attribute both systems are substantially different, that is the charge condition. The reason is the big difference in the recombination rates of the two systems, caused by the different structures of the pores in the systems which are needed for the migration of the oxygen from the positive to the negative plates of the cells. While the glass fiber mat of AGM batteries has pore diameters of up to 100 microns, the capillaries of gel batteries are formed by shrinking of the gel because of aging. In this way capillaries are formed which are in maximum one-tenth of the... 

In the sintered-plate design, the active materials are held within the pores of a sintered-nickel structure. Nickel hydroxide with 3% to 10% cobalt hydroxide is the active material of the positive plate while cadmium hydroxide is the active material of the negative plate. 

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