Role of Indium Alloying with Lead as a Means to Reduce the Passivation Phenomena in Lead/Acid Batteries

Table 2

Apparent activation energy values for Pb and Pb-In alloys in 4 M H₂SO₄ solution at both peak (I) and passive region.

Pb or alloys	(kJ·mol^−1) at Peak (I)	(kJ·mol^−1); (in passive region at 1.2 V)
Pb	24.20	52.00
Alloy (I)	26.20	49.00
Alloy (II)	21.30	45.60
Alloy (III)	18.00	41.50
Alloy (IV)	16.60	26.11
Alloy (V)	15.00	22.00