Electrochemically Enhanced Low-Impedance Ti3C2Tx MXene Epidermal Electrodes for Accurate Electrophysiological Monitoring

Large Ti 3 C 2 T x MXene (~6.5 μm) was prepared through combined precursor particle sedimentation and mild shear-force-assisted delamination to enhance conductivity and capacitance. The epidermal electrode with orderly stacking structure was constructed using hydrogen bonding crosslinking and in-situ curing, demonstrating lower interfacial impedance (53 kΩ cm 2 at 10 Hz) and higher signal-to-noise (39 dB) compared to commercial Ag/AgCl gel electrode. The portable recording system was integrated with the epidermal electrodes, enabling applications in muscular status and healthcare monitoring.