Highly Graphitized Lignin-Derived Porous Carbon with Hierarchical N/O Co-Doping “Core-Shell” Superstructure Supported by Metal-Organic Frameworks for Advanced Supercapacitor Performance

Yinying Long,Xingye An,Hao Zhang,Jian Yang,Liqin Liu,Zhongjian Tian,Guihua Yang,Zhengbai Cheng,Haibing Cao,Hongbin Liu,Yonghao Ni

CHEMICAL ENGINEERING JOURNAL（2023）

Cited 37|Views7

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Abstract

•ZIF-8 NPs act as versatile porous templates for the efficient and uniform adsorption of lignin molecules.•Lignin layer evenly wrapped on ZIF-8 NPs can be carbonized into uniform and compact carbon “shell”.•KOH activation combining HF/HCl treatment fabricates highly graphitized and porous superstructure of KGC-EHL@ZIF-8 NPs.•Porous graphitized “shell” and N/O co-doping species greatly facilitate the advanced supercapacitor performance.•The proposed mechanisms for improved supercapacitor performance were well analyzed and demonstrated.

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Key words

Core-shell nanostructure,Graphitization,Metal-organic framework,Lignin,Activated carbon layers,Supercapacitors

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