Robust High Thermoelectric Harvesting Under a Self‐Humidifying Bilayer of Metal Organic Framework and Hydrogel Layer

Abstract

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.

Chloride transport in conductive polymer films for an n-type thermoelectric platform

“…1a, in which CPs are doped with metal cations (M + ), to generate anionic channels. The highly doped PEDOT:PSS (HD) was chosen as a mixed ionicelectronic polymer 2,9 and CuCl 2 as a binding metal plus anion source. To a solution of PEDOT:PSS, anhydrous CuCl 2 was added in concentrations of 14, 25, 36, 40, and 57 wt% (solids content) and dried to afford metal-complexed anionic polymer films, which were named NPC14, NPC25, NPC36, NPC40, and NPC57, respectively.…”

“…Taking advantage of the high negative S and stable voltage generation, NPC40 film was integrated with p-type HDH30 film 9 as a flexible module-type TE harvester. This module-type TE harvester had 10 pairs of p-n legs (each area of 2 Â 4 mm 2 ) on CNT electrodes (Fig.…”

“…[2][3][4][5][6][7] To this end, eco-friendly and low-cost conductive polymers (CPs) have been explored as unique candidates for p-type TE materials due to their high Seebeck coefficients (S). 8,9 In particular, ionic TE materials based on poly(3,4-ethylenedioxythiophene) (PEDOT) doped with poly(styrene sulfonate) (PSS) were explored for high ionic Seebeck coefficients (S i ) originating from the Soret effect. [10][11][12][13][14][15] Recently, we demonstrated robust p-type proton-conducting polymer films by using high-molecular-weight poly(styrene sulfonic acid) (PSSH) as a dopant.…”

“…[10][11][12][13][14][15] Recently, we demonstrated robust p-type proton-conducting polymer films by using high-molecular-weight poly(styrene sulfonic acid) (PSSH) as a dopant. 9 The highly doped PEDOT:PSS containing 30 wt% PSSH (HDH30) recorded high S i (16.2 mV K À1 ) and power factor (PF, 7.6 mW m À1 K À2 ). Furthermore, the introduction of selfhumidifying layers including a metal-organic framework (MOF-801) and a hydrogel layer on the HDH30 films afforded an environmentally sustainable TE prototype.…”

Organosulfonate Counteranions—A Trapped Coordination Polymer as a High‐Output Triboelectric Nanogenerator Material for Self‐Powered Anticorrosion

“…The metal-organic coordination polymers (MOCPs), as ubclass of crystalline materials comprised of inorganic metal nodes and organic linkers, have been deemed as potentialc andidates of ideal materials for many applications in various areas. [1][2][3][4][5][6] Amongt he application fields, considerable attention has been paid to the applicationo fM OCPs in electricity,i ncluding the development of fuel cells, [7,8] supercapacitors, [9,10] thermoelectrics, [11,12] and others. Recently,t he well-known metal-organic frameworks (MOFs), also known porous coordination polymers, have been used as triboelectric nanogenerator (TENG) materials for self-powered systemsa nd sensor applications, [13,14] which is advantageous not only for extending the advanced materials of TENG but also for expanding the application range of MOCPs.…”