Size Engineering of Ti₃C₂T_x Nanosheets for Enhanced Supercapacitance Performance

In this research, we synthesized a series of Ti₃C₂T_x nanosheets with varying lateral dimensions and conducted a thorough investigation into the profound relationship between the electrochemical performance of Ti₃C₂T_x materials and their lateral sizes. This study innovatively incorporates a clever combination of small-sized and large-sized Ti₃C₂T_x nanosheets in the electrode preparation process. This strategy yields excellent results at low scan rates, with the fabricated electrode achieving a high volumetric capacitance of approximately 658 F/g. Even more remarkable is the fact that, even under extreme testing conditions where the scan rate surges to 10 V s^-1, the electrode retains its capacitive characteristics robustly without any significant performance degradation. These outstanding characteristics underscore the exceptional ability of Ti₃C₂T_x electrode materials to maintain high energy storage capacity during rapid charge-discharge cycles, holding significant importance for advancing the development of electrochemical energy storage devices with fast response times and high power densities.