Scientists may have an explanation for why some batteries don’t last

New research suggests hydrogen protons from the electrolyte may be responsible for lithium-ion battery degradation and self-discharge, rather than lithium ions. Scientists found that hydrogen leaks into the cathode, reducing space for lithium ions and triggering unwanted chemical reactions. This "protonation" process worsens at higher voltages. The findings could lead to improved battery life and longer-range electric vehicles, while potentially reducing battery mineral mining. Further research is needed to determine the applicability to different battery types.