Robust thermoelectric harvesting is explored from a proton-doped mixed ionic conductive (PMIC) film under water-harvesting metal organic framework (MOF) film coupled with hydrogel layer (MOF/HG). As a PMIC, highly doped poly(3,4-ethylenedioxythiophene)s with poly(styrene sulfonate) (PEDOT:PSS) is prepared by precisely controlling the proton doping to afford a stable and high thermoelectric PMIC. Among the PMICs, the PEDOT:PSS film doped with 30 wt% of poly(styrene sulfonic acid) (PSSH) recorded a Seebeck coefficient of over 16.2 mV K −1 and a thermal voltage of 81 mV for a temperature gradient (ΔT) of 5 K. The thermal charging on PMICs afforded high thermal voltage and current output, reproducibly, to show cumulative thermoelectric nature. Environmentally sustainable thermoelectric harvesting is achieved from a PMIC under a MOF/HG, prepared by water-harvesting MOF-801 coupled with a HG layer, to provide constant relative humidity of 90% and V oc over 72 h at ambient condition.
Bibliographical noteFunding Information:
B.K. and J.N. contributed equally to this work. This research was supported by the Global Research Laboratory (GRL) through the National Research Foundation of Korea (NRF) (no. 2016K1A1A2912753).
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics