原位生长TiO2/Ti3C2Tx复合材料及其电化学性能研究OA

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 pro-posed for the preparation of high-performance MXene-based composites.Methods TiO2/Ti3C2Tx composites were synthesized via in situ growth during annealing of Ti3C2Tx 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.Re-sults TiO2/Ti3C2Tx composites with different morphologies were obtained by controlling the annealing tem-perature.The composite prepared at the optimal annealing temperature exhibited a high specific capaci-tance of 158 F·g-1 at a current density of 1 A·g-1.Furthermore,the assembled TiO2/Ti3C2Tx//Ti3C2Tx 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 superca-pacitor 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.