Nickel–iron battery
OverviewHistoryUsesDurabilityElectrochemistryPlate design of the original Edison batteryChargeDischargeSwedish inventor Waldemar Jungner invented the nickel–cadmium battery in 1899. Jungner experimented with substituting iron for the cadmium in varying proportions, including 100% iron. Jungner discovered that the main advantage over the nickel–cadmium chemistry was cost, but due to the lower efficiency of the charging reaction and more pronounced formation of hydrogen (gassing), the