MXene, a family of layered transition metal carbides and nitrides, has emerged as a promising material for micro-supercapacitors owing to its high electrical conductivity and large specific surface area. However, its poor oxidation stability in aqueous environments limits its long-term usability. In this study, we propose a facile one-step electrochemical strategy that simultaneously synthesize heteroatom-doped carbon dots (CDs) and intercalate them into the interlayer space of MXene. This process modulates the interlayer spacing and promotes the exfoliation of MXene into monolaye, thereby increasing its accessible surface area. The proposed method is expected to enhance the chemical stability and electrochemical activity of MXene, ultimately improving its performance as a supercapacitor electrode material. Furthermore, this simplified approach lowers the fabrication complexity of MXene-based materials, offering practical advantages for future energy storage applications.