XIA Q X, ZHU Z Y, GUO W,et al.In situ synthesis of TiO₂/Ti₃C₂T_x composites and their electrochemical performance[J].Journal of Henan Polytechnic University(Natural Science) ,2026,45(3):188-196.

doi:10.16186/j.cnki.1673-9787.2024020006

Received:2024/02/03

Revised:2024/04/22

Published:2026/04/28

In situ synthesis of TiO₂/Ti₃C₂Txcomposites and their electrochemical performance

Xia Qixun1, Zhu Ziyang1, Guo Wen2, Chang Yukai1, Wang Libo1, Hu Qianku1, Zhou Aiguo1

1.School of Materials Science and Engineering， Henan Polytechnic University， Jiaozuo  454003， Henan， China；2.Department of Macromolecular Science， Fudan University， Shanghai  200438， China

Abstract: Objectives s To address the issues of low energy density and complex fabrication processes of MXene-based supercapacitor electrode materials， a low-cost and environmentally friendly method is proposed for the preparation of high-performance MXene-based composites.  Methods TiO₂/Ti₃C₂T_x composites were synthesized via in situ growth during annealing of TiO₂/Ti₃C₂T_x MXene and employed as positive electrode materials for supercapacitors. The microstructure and electrochemical performance of the composites were systematically investigated using XRD， SEM， TEM， XPS， and N₂ adsorption-desorption measurements.  Results TiO₂/Ti₃C₂T_x composites with different morphologies were obtained by controlling the annealing temperature. The composite prepared at the optimal annealing temperature exhibited a high specific capacitance of 158 F·g^-1 at a current density of 1 A·g^-1. Furthermore， the assembled TiO₂/Ti₃C₂T_x// Ti₃C₂T_x MXene asymmetric supercapacitor delivered an energy density of 8.17 Wh·kg^-1 at a power density of 240.6 W·kg^-1.  Conclusions This study not only provides a new approach for the preparation of high-performance supercapacitor electrode materials via in situ growth but also offers new insights into understanding and optimizing the structure and performance of MXene-based composites， thereby providing theoretical and experimental support for the  development of low-cost and high-performance MXene-based electrode materials.

Key words:two-dimensional MXene; Ti₃C₂T_x; TiO₂;supercapacitor