Wei Lei, Li Wanlong, Zhao Teng, Zhang Nanxiang, Li Li, Wu Feng, Chen Renjie
School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China.
Chem Commun (Camb). 2020 Mar 10;56(20):3007-3010. doi: 10.1039/c9cc08218b.
N-Doped carbon nanotubes with embedded cobalt nanoparticles (Co-NCNTs) were prepared by thermally annealing a mixture of ZIF-67 and dicyandiamide precursors. Because of the dual chemical affinity of Co and N to S species, Li-S batteries with a Co-NCNT modified separator revealed enhanced redox kinetics of lithium polysulfide conversion and achieved a high areal capacity of 3.73 mA h cm-2 after 100 cycles at 0.1C at a sulfur loading of 4.3 mg cm-2.
通过对ZIF-67和双氰胺前驱体的混合物进行热退火制备了嵌入钴纳米颗粒的氮掺杂碳纳米管（Co-NCNTs）。由于钴和氮对硫物种具有双重化学亲和力，具有Co-NCNT修饰隔膜的锂硫电池显示出多硫化锂转化的氧化还原动力学增强，并且在硫负载为4.3 mg cm-2的情况下，在0.1C下循环100次后实现了3.73 mA h cm-2的高面积容量。
