A Multifunctional MXene/PVA Hydrogel as a Continuous Ionic Thermoelectric Generator and a Strain/Temperature Sensor.

ABSTRACT: This research reports a continuous output ionic thermoelectric (i-TE) system based on MXene/PVA (polyvinyl alcohol) hydrogel, by utilizing thermo-diffusion of Cu²⁺ and Cl^- ions and the redox reaction involving Cu/Cu²⁺ at the electrode interfaces. The thermopower of the i-TE system can be independently tuned to a value of -3.13 mVK^-1 by adjusting the ion diffusivity via MXene (Ti₃C₂T_x). The i-TE system demonstrates a rapid response time of less than 100 s, outperforming any other polyelectrolyte-based system. Crucially, the i-TE system achieves continuous current output when equipped with copper electrodes, facilitated by the redox reaction involving Cu/Cu²⁺, and maintains stable long-term outputs across

SUBMITTER: Ji D 

PROVIDER: S-EPMC11753485 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature