In situ fabrication of dry/gel bilayer Ti3C2Tx films for high-rate micro-supercapacitors

A H2SO4-Ti3C2Tx ion-gel is in situ fabricated to prevent the restacking of Ti3C2Tx for high-rate micro-supercapacitors. The ion-gel pillared by an electrolyte possesses an enlarged interlayer spacing facilitating ion transport. Furthermore, a bilayer structure is designed with dry Ti3C2Tx for fast electron conduction. The bilayer Ti3C2Tx film shows improved capacitance from 49% to 73% of the initial capacitance at a high scan rate of 200 mV s(-1), along with excellent cycle stability. This study opens up a concise and efficient way for high-performance micro-supercapacitors.

Automated summary

This study presents the in-situ fabrication of an H2SO4-Ti3C2Tx ion-gel for preventing restacking in high-rate micro-supercapacitors. The ion-gel, with an electrolyte as support, has enlarged interlayer spacing for improved ion transport. Additionally, a bilayer structure with dry Ti3C2Tx is designed to enhance electron conduction, resulting in improved capacitance and cycle stability at high scan rates.