MnCo2O4 Anchored on P-Doped Hierarchical Porous Carbon as an Electrocatalyst for High-Performance Rechargeable Li鈥揙2 Batteries

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• 作者：Xuecheng Cao ; Jiao Wu ; Chao Jin ; Jinghua Tian ; Peter Strasser ; Ruizhi Yang
• 刊名：ACS Catalysis
• 出版年：2015
• 出版时间：August 7, 2015
• 年：2015
• 卷：5
• 期：8
• 页码：4890-4896
• 全文大小：526K
• ISSN：2155-5435

文摘

The design and synthesis of MnCo₂O₄ anchored on P-doped hierarchical porous carbon (MCO/P-HPC) is reported. Without harsh oxidative treatment, creating anchoring sites for MnCo₂O₄ on the surface of carbon is realized by P-doping in carbon. The chemical coupling between P-HPC and MCO induced by P-doping provides pathways for fast charge transport. This hybrid with a hierarchical porous structure favors efficient electrolyte penetration, oxygen transport, and effective accommodation of insoluble discharge product Li₂O₂. When employed as an electrocatalyst in rechargeable Li鈥揙₂ batteries, the MCO/P-HPC hybrid delivers a high discharge capacity (13鈥?50 mAh g^鈥? at 200 mA g^鈥?), excellent rate capability (7028 mAh g^鈥? at 1000 mA g^鈥?), and long cycle stability (200 cycles at a capacity of 1000 mAh g^鈥? under 200 mA g^鈥?).