The Crimea War was in 1855. You must mean WWI.
Henry Moseley was killed at Gallipoli in the Crimea area during WW1. I didn’t say he was killed in the Crimean War. The Crimea still has a lot of war history.
In 1913 Moseley constructed what he called an atomic battery. Two photocells placed face to face with a small air gap between. Thorium Hexafluoride (radioactive) gas was sealed into the space between the 2 photocells and the edges sealed against leakage.
Moseley made about a little over a dozen of these devices and most of them are still functioning today. The others were broken or damaged by various people while examining them over the years. From what I have read, they have been putting out about a milliamp at about a volt for the past hundred years. Impressive for a device made over a hundred years ago. Talk about the energizer bunny.