{Reference Type}: Journal Article {Title}: Uniform MnO2 nanostructures supported on hierarchically porous carbon as efficient electrocatalysts for rechargeable Li-O2 batteries {Author}: Han, Xiaopeng; Cheng, Fangyi; Chen, Chengcheng; Hu, Yuxiang; Jun, Chen {Journal}: Nano Research {ISBN/ISSN}: 1998-0124 {Year}: 2015 {Volume}: 8 {Issue}: 1 {Pages}: 156-164 {DOI}: 10.1007/s12274-014-0604-y {Keywords}: lithium-oxygen batteries {Keywords}: nanocomposite {Keywords}: catalyst {Keywords}: manganese oxide {Keywords}: oxygen electrochemistry {Abstract}: Through in situ redox deposition and growth of MnO2 nanostructures on hierarchically porous carbon (HPC), a MnO2/HPC hybrid has been synthesized and employed as cathode catalyst for non-aqueous Li-O2 batteries. Owing to the mild synthetic conditions, MnO2 was uniformly distributed on the surface of the carbon support, without destroying the hierarchical porous nanostructure. As a result, the as-prepared MnO2/HPC nanocomposite exhibits excellent Li-O2 battery performance, including low charge overpotential, good rate capacity and long cycle stability up to 300 cycles with controlling capacity of 1, 000 mAh·g-1. A combination of the multi-scale porous network of the shell-connected carbon support and the highly dispersed MnO2 nanostructure benefits the transportation of ions, oxygen and electrons and contributes to the excellent electrode performance. {URL}: https://www.sciopen.com/article/10.1007/s12274-014-0604-y {Language}: en