A Honeycomb‐Like Bulk Superstructure of Carbon Nanosheets for Electrocatalysis and Energy Storage. (26th May 2020)

• Record Type: Journal Article
• Authors: Zou, Lianli; Hou, Chun‐Chao; Wang, Qiuju; Wei, Yong‐Sheng; Liu, Zheng; Qin, Jun‐Sheng; Pang, Huan; Xu, Qiang
• Is Part Of: Angewandte Chemie. Volume 132:Number 44(2020)
• Page Start: 19795
• Page End: 19800
• Publication Date: 2020-05-26
• Subjects: carbon nanosheets -- honeycomb-like structures -- metal–organic frameworks -- oxygen reduction reaction -- superstructures; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202004737
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Superstructures have attracted extensive attention because of their potential applications in materials science and biology. Herein, we fabricate the first centimeter‐sized porous superstructure of carbon nanosheets (SCNS) by using metal–organic framework nanoparticles as a template and polyvinylpyrrolidone as an additional carbon source. The SCNS shows a honeycomb‐like morphology with wall‐sharing carbon cages, in each cavity of which a porous carbon sphere is encapsulated. A single piece of SCNS is directly used as the electrode for a two‐electrode symmetrical supercapacitor cell without any binders and supports, benefiting from its advantage in ultra‐large geometric size, and the Fe‐immobilized SCNS exhibits excellent catalytic performances for oxygen reduction reaction and in a Zn–air battery. This synthetic strategy presents a facile approach for preparing functional SCNS at centimetric scale with controllable morphologies and compositions favoring the fabrication of energy devices. Abstract : Nanosheets to honeycombs : Superstructures have attracted extensive attention in material science and biology. The first centimeter‐sized porous superstructure of carbon nanosheets was prepared by using MOF nanoparticles as a template, which exhibits a honeycomb‐like morphology with wall‐sharing carbon cages and shows great potential applications in electrochemical devices.