Waldemar Jungner

Ernst Waldemar Jungner (19 June 1869 – 30 August 1924) was a Swedish inventor and engineer. In 1898 he invented the nickel-iron electric storage battery (NiFe), the nickel-cadmium battery (NiCd), and the rechargeable alkaline silver-cadmium battery (AgCd). As an inventor, he also fabricated a fire alarm based on different dilutions of metals. He also worked on the electrolytic production of sodium carbonate and patented a rock drilling device.

Early life Ernst Waldemar Jungner was born on 19 June 1869 in Västra Götaland County, Sweden.

Education Jungner attended Skara upper secondary school, and studied chemistry, mathematics, astronomy, botany, geology and Latin at Uppsala University. He went on to carry out further studies at the Royal Institute of Technology (KTH) in Stockholm.

Later life and death Jungner patented designs for a fuel cell in 1907. He carried out investigations into the production of cement, and the extraction of radium from ores.

Jungner joined the Royal Swedish Academy of Engineering Sciences in 1922 and in 1924 he received the Swedish Chemical Society's Oscar Carlson Medal. Jungner died on 30 August 1924 of pneumonia at the age of 55.