He used nickel and magnesium for electrodes. Potassium chloride is used as a salt substitute, so it isn’t dangerous to handle (at least, no more dangerous than anything else heated to 400 ...

In the previous studies, researchers replaced participants' salt with a 75% salt, 25% potassium chloride substitute. In the study, "Salt Substitution and Recurrent Stroke and Death: A Randomized ...