Exceptional n‐Type Ionic Thermoelectric Hydrogels by Synergistic Hydrophobic and Coordination Interactions

and PMNT) and cations, enabling the giant ionic thermopower. Besides, the long-range hydrophobic interactions contribute to the overall mechanical robustness. The developed hydrogels are successfully implemented in self-powered temperature sensors and low-grade heat harvesting systems, such as powering a cooling fan by utilizing the waste heat from a working tablet. This work offers an alternative pathway toward developing high-performance i-TE materials for wearable electronics and low-grade heat harvesting applications.