N-doped defective carbon with trace Co for efficient rechargeable liquid electrolyte-/all-solid-state Zn-air batteries

作者：Chen, Zhiyan; Wang, Qichen; Zhang, Xiaobin; Lei, Yongpeng^*; Hu, Wei; Luo, Yao; Wang, Yaobing^*

来源：Science Bulletin, 2018, 63(9): 548-555.

DOI：10.1016/j.scib.2018.04.003

• Defect
• Oxygen electrocatalysts
• Rechargeable all-solid-state batteries

Simple synthesis of multifunctional electrocatalysts with plentiful active sites from earth-abundant materials is especially fascinating. Here, N-doped defective carbon with trace Co (1.5 wt%) was prepared via a scalable one pot solid pyrolysis process. The sample exhibits efficient bifunctional OER/ORR activity in alkaline, mainly ascribed to the unique micro-mesoporous structure (1-3 nm), high population of graphitic-N doping (up to 49.0%), abundant defects and the encapsulated Co nanoparticles with graphitized carbon. The according rechargeable liquid Zn-air batteries showed excellent performance (maximum power density of 154.0 mW cm(2); energy density of 773 Wh kg(1) at 5 mA cm(2) and charging-discharging cycling stability over 100 cycles). As a proof-of-concept, the flexible, rechargeable all-solid-state Zn-air batteries were constructed, and displayed a maximum power density as high as 45.9 mW cm(2), among the top level of those reported previously.

• 出版日期2018-5-15
• 单位东华大学; 中南大学; 中国人民解放军国防科学技术大学; 中国科学院福建物质结构研究所