Over 7500 Cycles Achieved in Platinum-Group-Metal-Free Ni-H2 Battery Through Reversible Hydrogen Spillover.
Traditional Ni-H2 batteries employing platinum-group metal (PGM) catalysts exhibit ultralong lifetimes (> 10 000 cycles), yet comparable durability has not been achieved in recently developed PGM-free systems, mainly due to sluggish hydrogen evolution and oxidation reactions (HER/HOR) in alkaline media. Herein, we empl...