School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China; Jiangsu Oliter Energy Technology Co.,Ltd, Gaoyou 225600, PR China.
J Colloid Interface Sci. 2021 Nov 15;602:627-635. doi: 10.1016/j.jcis.2021.06.027. Epub 2021 Jun 6.
Recently, carbon nanotubes (CNT)-based interconnected architectures exhibit promising prospects in supercapacitors due to their flexibility and high electrical conductivity. Herein, a three-dimensional (3D) interconnected network structure combined with conductive carbon nanotubes interpenetrating MOFs-derived Co-Ni-S composite spheres (Co-Ni-S/CNTs) was synthesized. Such 3D interconnected architecture significantly leads to a favorable electronic structure, fast charge-transfer capacity, and more pseudocapacitive. The Co-Ni-S/CNTs-based hybrid electrode exhibits an extraordinary specific capacitance of 540.6C g at 1 A g and competitive rate performance (capacity retention rate of 69.9% when the current density increases to 10 times). Subsequently, a hybrid supercapacitor is assembled using Co-Ni-S/CNTs as the positive electrode and commercial activated carbon as negative electrode. The device delivers a high energy density of 63.5 W h kg at 800 W kg and keeps 83.0% initial capacitance retention after 10,000 cycles. The encouraging performances demonstrate the significant contribution of the 3D interconnected architecture for the future energy storage.
最近，基于碳纳米管（CNT）的互联结构由于其灵活性和高导电性，在超级电容器中展现出了广阔的前景。本文合成了一种三维（3D）互联网络结构，结合了导电碳纳米管贯穿的 MOF 衍生的 Co-Ni-S 复合球（Co-Ni-S/CNTs）。这种 3D 互联结构显著改善了电子结构、加快了电荷转移能力并提高了赝电容。基于 Co-Ni-S/CNTs 的混合电极在 1 A g 下表现出非凡的比电容为 540.6 C g，具有出色的倍率性能（当电流密度增加 10 倍时，容量保持率为 69.9%）。随后，使用 Co-Ni-S/CNTs 作为正极，商业活性炭作为负极组装混合超级电容器。该器件在 800 W kg 时具有 63.5 Wh kg 的高能量密度，并且在 10000 次循环后保持 83.0%的初始电容保持率。令人鼓舞的性能表明，3D 互联结构为未来的储能做出了重要贡献。
