Issue 7, 2023

A UiO-66-NH2 MOF derived N doped porous carbon and ZrO2 composite cathode for zinc-ion hybrid supercapacitors

Abstract

Aqueous Zn-ion hybrid supercapacitors (ZHSs) integrating the merits of Zn-ion batteries with high energy densities and supercapacitors with high power densities are considered one of the promising candidates for highly safe large-scale energy storage. Unfortunately, the unsatisfactory energy density of carbon-based cathode materials limited the practical application of ZHSs. A strategy of introducing heteroatoms and pseudocapacitive metal oxide materials into carbon materials is proposed to build ZHSs with better electrochemical performance. Herein, an N-doped carbon framework with homogeneously distributed nanoscale ZrO2 (NC@ZrO2) was prepared by pyrolyzing Zr-containing metal–organic frameworks (MOFs, UiO-66-NH2). Due to the facilitated chemical adsorption and accelerated Zn2+-storage kinetics, the NC@ZrO2-based ZHS demonstrates a remarkable maximum energy density of 69 W h kg−1 and a maximum power density of 5760 W kg−1. This work provides a promising strategy to fabricate high-performance cathode materials for ZHSs by integrating the N-doping strategy and pseudocapacitive reactions, which sheds light on the charge-storage mechanism and advanced cathode material design for ZHSs toward practical applications.

Graphical abstract: A UiO-66-NH2 MOF derived N doped porous carbon and ZrO2 composite cathode for zinc-ion hybrid supercapacitors

Supplementary files

Article information

Article type
Research Article
Submitted
01 Janv. 2023
Accepted
09 Febr. 2023
First published
16 Febr. 2023

Inorg. Chem. Front., 2023,10, 2115-2124

A UiO-66-NH2 MOF derived N doped porous carbon and ZrO2 composite cathode for zinc-ion hybrid supercapacitors

X. Wang, H. Hong, S. Yang, S. Bai, R. Yang, X. Jin, C. Zhi and B. Wang, Inorg. Chem. Front., 2023, 10, 2115 DOI: 10.1039/D2QI02777A

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