Ordered Hierarchical Mesoporous/Macroporous Carbon: A High-Performance Catalyst for Rechargeable Li-O2 Batteries

Three-dimensional ordered mesoporous/macroporous carbon sphere arrays (MMCSAs) are synthesized and then used as a catalyst for Li-O-2 batteries. The hierarchical porous structure of the MMCSAs not only facilitates electrolyte immersion and Li+ diffusion but also provides an effective space for O-2 diffusion and O-2/Li2O2 conversion, and thus efficiently improves the performance of Li-O-2 batteries.