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Robust High Thermoelectric Harvesting Under a Self‐Humidifying Bilayer of Metal Organic Framework and Hydrogel Layer
Author(s) -
Kim Byeonggwan,
Na Jongbeom,
Lim Hanwhuy,
Kim Younghoon,
Kim Jinbo,
Kim Eunkyoung
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201807549
Subject(s) - materials science , pedot:pss , thermoelectric effect , chemical engineering , sulfonic acid , doping , bilayer , layer (electronics) , optoelectronics , polymer chemistry , nanotechnology , chemistry , membrane , physics , engineering , thermodynamics , biochemistry
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 (Δ T ) 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.