夏启勋，朱子阳，郭雯,等. 原位生长TiO₂/Ti₃C₂T_x复合材料及其电化学性能研究[J].河南理工大学学报(自然科学版)，doi:10.16186/j.cnki.1673-9787. 2024020006.

XIA Q X, ZHU Z Y, GUO W, et al．In-situ preparation of TiO2/Ti3C2Tx composites and their electrochemical properties[J]. Journal of Henan Polytechnic University(Natural Science) ，doi:10.16186/j.cnki.1673-9787. 2024020006.

原位生长TiO₂/Ti₃C₂T_x复合材料及其电化学性能研究(网络首发)

夏启勋¹，朱子阳¹，郭雯²，常玉凯¹，王李波¹，胡前库¹，周爱国¹

1.河南理工大学 材料科学与工程学院, 河南 焦作 454000；2 复旦大学 高分子科学系，上海 江湾 2000438

摘要: 目的 对Ti3C2Tx MXene进行退火处理实现原位生长得到TiO2/Ti3C2Tx复合材料，并将其作为超级电容器的正极活性材料。方法 通过XRD、SEM、TEM、XPS、N2吸脱附等结构表征技术结合电化学测试研究了TiO2/Ti3C2Tx复合材料的微观结构和电化学性能。调节退火温度可以得到不同形貌的TiO2/Ti3C2Tx复合材料，结果 最佳退火温度下制备的TiO2/Ti3C2Tx复合材料在1 A g-1时比电容为158 F g-1。当TiO2/Ti3C2Tx复合材料为正极材料，Ti3C2Tx MXene为负极材料，组装成非对称型超级电容器(ASC)后，经过5000次循环过后电容保有率为80.2%，器件具有良好的循环稳定性。结论 这种原位制备纳米结构 MXene 的策略将为开发低成本、高性能MXene基电极材料提供借鉴。

关键词: 二维MXene；Ti3C2Tx；TiO2；超级电容器

doi: 10.16186/j.cnki.1673-9787.2024020006

基金项目: 国家自然科学基金资助项目（52372284,52275187,52202364），河南省自然科学基金资助项目（232300421135，232300421204），河南理工大学博士基金（B2019-41）。

收稿日期：2024-02-03

修回日期：2024-04-22

网络首发日期：2024-11-19

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

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