A Daniell cell is a type of electrochemical cell invented in 1836 by John Frederic Daniell, a British chemist and meteorologist. It consists of a copper pot filled with a copper (II) sulfate solution, in which is immersed an unglazed earthenware container filled with sulfuric acid and a zinc electrode. Daniell Cell Definition: A Daniell Cell is defined as an improved version of the Voltaic Cell that prevents polarization by converting chemical energy into electrical energy. The Daniell cell is a type of electrochemical cell invented in 1836 by John Frederic Daniell, a British chemist and meteorologist, and consists of a copper pot filled with a copper (II) sulfate solution, in which is immersed an unglazed earthenware container filled with sulfuric acid and a zinc electrode. He was searching for a way to eliminate the hydrogen bubble problem found in the voltaic pile, and his solution was to use a second electrolyte to consume the hydrogen produced by the first ... In 1836, Daniell's modification of the simple electrical cell resulted in a longer-lasting source of power. It is known as the Daniell cell. Daniell’s setup isolated the copper and zinc ions from each other, preventing polarization from interrupting the flow of electricity. At the same time, it allowed ions in the electrolyte to move between the two metals, necessary to complete the electrical circuit. Let’s take a look at how this works.