Gadolinium doped ceria on graphene cathode with enhanced cycle stability for non-aqueous lithium-oxygen batteries

摘要: Abstract Cycle stability is crucial for non-aqueous lithium-oxygen batteries, which dependent with the cathode performance. In this work, gadolinium doped CeO2 nanoparticles are prepared through one-pot hydrothermal process on reduced graphene oxide, and applied as catalyst batteries. With catalytic effect of Ce0.8Gd0.2O2-δ Li2O2 formation decomposition, battery delivers both low discharge charge overpotential about 0.18 V 0.69 V at current density 400 mA g−1. Moreover, cycle enhanced over 100 times at capacity limitation 600 mAh·g−1. The superiority may attribute to stabilization doping process, can preserve from migration aggregation during process.