Heterogeneous Bimetallic Organic Coordination Polymer-Derived Co/Fe@NC Bifunctional Catalysts for Rechargeable Li–O2 Batteries

• DOI: 10.1021/acsami.1c22643
• Publication Date: 2022-01-25T12:11:37Z
• Authors: Dongdong Li; Jianwen Liang; Stuart J. Robertson; Yingtong Chen; Naiguang Wang; Minhua Shao; Zhicong Shi
• Keywords: Bimetallic strip; Oxygen evolution

The Li-O2 battery has attracted substantial attention due to its high theoretical energy density. In particular, high-efficiency oxygen catalysts are very important for the design of practical batteries. Herein, we have synthesized heterogeneous crystalline-coated partially crystalline bimetallic organic coordination polymers (PC@C-BMOCPs), which further pyrolyzed obtain Co- and Fe-based nanoparticles embedded within rodlike N-doped carbon (Co/Fe@NC) as a bifunctional reduction reaction/oxygen evolution reaction (ORR/OER) catalyst used in battery. Owing excellent ORR/OER catalytic ability, Co/Fe@NC exhibits an efficient reversible between O2 Li2O2. Additionally, large number mesoporous channels present core-shell nanoparticles. These not only promote diffusion Li+ O2, but also create ample room store insoluble discharge product batteries utilizing electrode exhibit capacity 17,326 mAh g-1, long cycling life more than 250 cycles, reversibility. This work provides universally applicable strategy designing nonnoble metal with electrochemical performance metal-air