A research team hailing from the Dalian Institute of Chemical Physics, under the auspices of the Chinese Academy of Sciences, has made a groundbreaking stride by formulating an innovative core-shell structured hydride ion electrolyte. This breakthrough has paved the way for the successful construction of the inaugural prototype hydride ion battery. This remarkable feat was featured in the esteemed international academic journal, Nature, on September 17 (Beijing Time). Hydrogen, a pivotal element in the realm of future clean energy, manifests in three distinct forms: the hydrogen cation, the hydride ion, and the hydrogen atom. Notably, the hydride ion boasts the highest electron density and exhibits the most robust reactivity among them, thereby holding immense promise for research and development endeavors and carrying profound scientific significance.