XIA Q X, ZHU Z Y, GUO W, et al．In-situ preparation of TiO₂/Ti₃C₂T_x composites and their electrochemical properties[J]. Journal of Henan Polytechnic University(Natural Science) ，doi:10.16186/j.cnki.1673-9787. 2024020006.

doi:10.16186/j.cnki.1673-9787. 2024020006.

Received：2024-02-03

Revised：2024-04-22

Online：2024-11-19

In-situ preparation of TiO₂/Ti₃C₂T_x composites and their electrochemical properties(Online)

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 454000, Henan, China; 2. Department of Macromolecular science, Fudan University, Jiangwan 200438, Shanghai, China

Abstract: Objectives Ti₃C₂T_x MXene was annealed to achieve in-situ growth of TiO₂/Ti₃C₂T_x composites, which were used as positive active materials for supercapacitors. Methods The microstructure and electrochemical properties of TiO₂/Ti₃C₂T_x composites were studied by XRD, SEM, TEM, XPS, N₂ adsorption and desorption. TiO₂/Ti₃C₂T_x composites with different morphologies can be obtained by adjusting the annealing temperature. Results The specific capacitance of TiO₂/Ti₃C₂T_x composites prepared at the optimal annealing temperature is 158 F g^-1 at 1 A g^-1. When TiO₂/Ti₃C₂T_x composite as the positive electrode material and Ti₃C₂T_x MXene as the negative electrode material to fabricate an asymmetric supercapacitor (ASC) device, and the specific capacitance retention rate is 80.2% after 5000 cycles, indicating that the ASC has good cycle stability. Conclusions This strategy of in-situ preparation of nanostructured MXene will provide reference for the development of low-cost, high-performance MXene-based electrode materials.

Key words: two-dimensional MXene materials; Ti₃C₂T_x; TiO₂; Supercapacitor