A High-Rate Lithium Manganese Oxide-Hydrogen Battery

Abstract

Rechargeable hydrogen\ngas batteries show promises for the integration\nof renewable yet intermittent solar and wind electricity into the\ngrid energy storage. Here, we describe a rechargeable, high-rate,\nand long-life hydrogen gas battery that exploits a nanostructured\nlithium manganese oxide cathode and a hydrogen gas anode in an aqueous\nelectrolyte. The proposed lithium manganese oxide-hydrogen battery\nshows a discharge potential of ∼1.3 V, a remarkable rate of\n50 C with Coulombic efficiency of ∼99.8%, and a robust cycle\nlife. A systematic electrochemical study demonstrates the significance\nof the electrocatalytic hydrogen gas anode and reveals the charge\nstorage mechanism of the lithium manganese oxide-hydrogen battery.\nThis work provides opportunities for the development of new rechargeable\nhydrogen batteries for the future grid-scale energy storage.