Issue 10, 2023

Ti3C2Tx MXene embedded metal–organic framework-based porous electrospun carbon nanofibers as a freestanding electrode for supercapacitors

Abstract

Rational modification of Ti3C2Tx MXenes for the preparation of freestanding and flexible carbon-based electrodes with great prospects for an energy storage facility is a crucial task for new-generation supercapacitors. Herein, a novel Ti3C2Tx MXene-decorated porous carbon nanofiber (PCNF) freestanding/flexible electrode is engineered through a sequential approach of electrospinning, in situ growth of ZIF67, and a carbonization process. By varying the concentration of MXenes in the fiber, the electrochemical performance of a set of MXene-integrated PCNFs is investigated, and flexible symmetric and asymmetric supercapacitor devices are assembled. The optimized MX-5@PCNF achieves a specific capacitance of 572.7 F g−1 at 1 A g−1 with high cycling stability (96.4% capacitance retention after 10 000 cycles) and superior rate capability (71.24% at 30 A g−1). Furthermore, MX-5@PCNF-based flexible symmetric and asymmetric (Co3O4@NF//MX-5@PCNF) devices furnish high energy densities of 22.53 W h kg−1 and 74.2 W h kg−1, respectively, along with a long life cycle, ideal coulombic efficiency, and rate capability, demonstrating their practical applicability. This study provides an alternative strategy to prepare MXene-decorated PCNF freestanding electrodes with high performance, and the technique can be extended to other 2D MXenes for designing efficient electrodes for flexible supercapacitors.

Graphical abstract: Ti3C2Tx MXene embedded metal–organic framework-based porous electrospun carbon nanofibers as a freestanding electrode for supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
14 Des 2022
Accepted
29 Jan 2023
First published
14 Feb 2023

J. Mater. Chem. A, 2023,11, 5001-5014

Ti3C2Tx MXene embedded metal–organic framework-based porous electrospun carbon nanofibers as a freestanding electrode for supercapacitors

I. Pathak, D. Acharya, K. Chhetri, P. Chandra Lohani, S. Subedi, A. Muthurasu, T. Kim, T. H. Ko, B. Dahal and H. Y. Kim, J. Mater. Chem. A, 2023, 11, 5001 DOI: 10.1039/D2TA09726E

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