고효율 리튬-공기 전지를 위한 금속 나노입자가 결착된 가스확산전극

Abstract

Researchers have been tantalized by the high-energy density of lithium-oxygen batteries (LOBs). However, the path toward reversibility in LOBs has been fraught with challenges for (dis)charging processes. Using sputtering in this work, we successfully decorated metallic nanoparticles (NP) on a carbon-based gas-diffusion electrode (GDE) as an effective catalyst for the formation and decomposition of the Li2O2 reaction product. The LOB cell with Pt-coated GDE (Pt-GDE) shows a specific discharge capacity of 8 mAh cm?2 at a current density of 0.2 mA cm?2 with a reduced overpotential for charging steps. The LOB cell with Pt-GDE exhibits an excellent cyclability (308th cycle) with a limited capacity of 0.1 mAh cm?2.