Complex sentence: In 2014, researchers at Stanford University discovered that adding a copper nanolayer to the electrolyte can detect fires by responding to a drop in the voltage caused by a dendrite, most likely formed during charging.
Split into simpler sentences: In 2014, researchers at Stanford University discovered that adding a copper nanolayer to an electrolyte can detect fires. The layer is capable of detecting a drop in the voltage caused by a dentrite, most likely during charging.