Formation of Hollow Co-Ni-S Nanowedges Arrays via Sulfidation-etch of ZIF-L for Advanced Hybrid Supercapacitor
Formation of Hollow Co-Ni-S Nanowedges Arrays via Sulfidation-etch of ZIF-L for Advanced Hybrid Supercapacitor
复制标题
通过 ZIF-L 的硫化蚀刻形成用于先进混合超级电容器的空心 Co-Ni-S 纳米楔阵列
DOI：
10.1002/slct.201904496
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发表时间：
2020
期刊：
影响因子：
2.1
通讯作者：
Li Lin
中科院分区：
文献类型：
--
作者：
Sun Jing;Yao Jing;Liu Ying;Lin Shuangyan;Xu Zhikun;Li Lin
具有丰富活性位点的自支撑中空纳米阵列作为超级电容器的无粘合剂电极具有很大的前景。在这项工作中，中空的Co-Ni-S的边缘阵列（NWAs）已被制作在镍泡沫（NF）基板上通过一个简单的硫化和ZIF-L-Co NWAs/NF的蚀刻。溶剂热时间的结构演化表明，中空Co-Ni-S NWA的形成主要是由于固体ZIF-L-Co NWA的富缺陷内部的蚀刻。独特的中空边缘结构和成分优势确保了中空Co-Ni-S NWAs优异的电化学性能，在5mA cm-2时的面积容量为0.286mA h cm-2，2000次循环后的容量保持率为78%。 此外，还组装了Co-Ni-S // AC混合超级电容器（HSC），表现出良好的应用性能。结果表明，Co-Ni-S NWAs/NF是一种有前途的无粘结剂电极，用于高性能混合超级电容器。
Self‐supported hollow nanoarrays with rich active sites hold great promise as binder‐free electrode for supercapacitors. In this work, the hollow Co‐Ni−S nanowedge arrays (NWAs) have been fabricated on Ni foam (NF) substrate through a facile sulfidation and etch of ZIF−L‐Co NWAs/NF. Structural evolution upon solvothermal time indicates that the formation of hollow Co‐Ni−S NWAs is mainly due to the etch of defect‐rich interior of solid ZIF−L‐Co NWAs. The unique hollow nanowedge structural and compositional advantages ensure the hollow Co‐Ni−S NWAs excellent electrochemical properties with areal capacity of 0.286 mA h cm−2at 5 mA cm−2, and 78% capacity retention after 2000 cycles. Moreover, the hybrid supercapacitor (HSC) of Co‐Ni−S // AC has been assembled, which illustrates good application performance. The results indicate that the Co‐Ni−S NWAs/NF is a promising binder‐free electrode for high‐performance hybrid supercapacitors.