电催化剂
材料科学
超级电容器
金属有机骨架
合理设计
纳米结构
纳米技术
化学工程
电极
电化学
物理化学
有机化学
工程类
吸附
化学
作者
Cao Guan,Ximeng Liu,Weina Ren,Xin Li,Chuanwei Cheng,John Wang
标识
DOI:10.1002/aenm.201602391
摘要
Metal‐organic frameworks (MOFs) are promising porous precursors for the construction of various functional materials for high‐performance electrochemical energy storage and conversion. Herein, a facile two‐step solution method to rational design of a novel electrode of hollow NiCo 2 O 4 nanowall arrays on flexible carbon cloth substrate is reported. Uniform 2D cobalt‐based wall‐like MOFs are first synthesized via a solution reaction, and then the 2D solid nanowall arrays are converted into hollow and porous NiCo 2 O 4 nanostructures through an ion‐exchange and etching process with an additional annealing treatment. The as‐obtained NiCo 2 O 4 nanostructure arrays can provide rich reaction sites and short ion diffusion path. When evaluated as a flexible electrode material for supercapacitor, the as‐fabricated NiCo 2 O 4 nanowall electrode shows remarkable electrochemical performance with excellent rate capability and long cycle life. In addition, the hollow NiCo 2 O 4 nanowall electrode exhibits promising electrocatalytic activity for oxygen evolution reaction. This work provides an example of rational design of hollow nanostructured metal oxide arrays with high electrochemical performance and mechanical flexibility, holding great potential for future flexible multifunctional electronic devices.
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