A Li–O2/Air Battery Using an Inorganic Solid-State Air Cathode

The “(−) lithium (Li) anode|organic anolyte + inorganic catholyte|solid-state cathode (+)” Li–O2/air battery based on an inorganic solid-state air cathode was fabricated with a simple method. The electrochemical performance and reaction products of the Li–O2/air batteries under pure O2 and ambient air were investigated, respectively. The inorganic Li-ion conductive solid-state electrolyte Li1.3Al0.3Ti1.7(PO4)3 was stable during cycling and avoided the decomposition and volatilization problems that conventional organic electrolytes faced. Moreover, the porous air cathode provided a sufficient gas-phase O2-transport channel, facilitating the achievement of a high capacity of 14192 or 7869 mA h g–1 under pure O2 or ambient air, respectively. Our results demonstrate that the Li–O2/air battery using an inorganic porous air cathode has a great potential for practical application.