Ionic thermoelectric paper

Jiao, Fei; Naderi, Ali; Zhao, Dan; Schlueter, Joshua; Shahi, Maryam; Sundström, Jonas; Granberg, Hjalmar; Edberg, Jesper; Ail, Ujwala; Brill, J. W.; Lindström, Tom; Berggren, Magnus; Crispin, Xavier

doi:10.1039/c7ta03196c

Cited by 86 publications

(67 citation statements)

References 37 publications

(42 reference statements)

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“…E ch of PEO‐NaOH, NFC‐PSSNa, PSSH, and PSSNa were calculated from the S in refs. , , , , and , respectively. LD: black, circle; HD: blue, circle; HDH30: red, circle; PSSNa: magenta, square; PSSH: green, circle; PEO‐NaOH: purple, circle; NFC‐PSSNa: brown, square.…”

Section: Resultsmentioning

confidence: 99%

“…Due to the Soret effect, the ionic S ( S i ) is much larger than the electronic S ( S e ) . Interestingly, with mixed ionic‐electronic conduction, the contribution from both electronic and ionic carriers to the thermopower is synergetic and can produce a stable thermovoltage over time under constant Δ T . One significant drawback is its low output, mainly resulting from the low electronic (σ e ) and ionic conductivities (σ i ) in mixed ionic‐electronic conductors (MIECs) being on the order of a few S m −1 and 10 −2 –10 −3 S m −1 , respectively .…”

Section: Introductionmentioning

confidence: 99%

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

Kim

Lim

et al. 2018

Adv Funct Materials

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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.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

Kim

Lim

et al. 2018

Adv Funct Materials

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“…Note that such high Seebeck coefficients are typical of ionic thermodiffusion as reported in solid ionic conductors. [ 16,43 ] The involvement of ionic charge carriers in the PBI film upon oxidation was also supported by the presence of non‐linear current‐voltage curves (Figure S12a, Supporting Information), which are found in other mixed ion–electron conductors. [ 17 ] This is corroborated by the evolution of complex impedance displaying an increased phase angle at low frequencies which suggests ionic displacement leading to a capacitive character (electric double layer capacitor at the electrode contact, see Figure S12c, Supporting Information).…”

Section: Figurementioning

confidence: 90%

High Thermoelectric Performance in n‐Type Perylene Bisimide Induced by the Soret Effect

et al. 2020

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Low‐cost, non‐toxic, abundant organic thermoelectric materials are currently under investigation for use as potential alternatives for the production of electricity from waste heat. While organic conductors reach electrical conductivities as high as their inorganic counterparts, they suffer from an overall low thermoelectric figure of merit (ZT) due to their small Seebeck coefficient. Moreover, the lack of efficient n‐type organic materials still represents a major challenge when trying to fabricate efficient organic thermoelectric modules. Here, a novel strategy is proposed both to increase the Seebeck coefficient and achieve the highest thermoelectric efficiency for n‐type organic thermoelectrics to date. An organic mixed ion–electron n‐type conductor based on highly crystalline and reduced perylene bisimide is developed. Quasi‐frozen ionic carriers yield a large ionic Seebeck coefficient of −3021 μV K−1, while the electronic carriers dominate the electrical conductivity which is as high as 0.18 S cm−1 at 60% relative humidity. The overall power factor is remarkably high (165 μW m−1 K−2), with a ZT = 0.23 at room temperature. The resulting single leg thermoelectric generators display a high quasi‐constant power output. This work paves the way for the design and development of efficient organic thermoelectrics by the rational control of the mobility of the electronic and ionic carriers.

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“…It may therefore be interesting to examine the potential of other conductors. Materials such as solid state ionic conductors and electrolytes [ 9 ], or ionic liquids [ 10 , 11 ], are relevant. Granular porous media [ 12 ] and electrically conductive polymers [ 13 ] also show thermoelectric effects.…”

Section: Introductionmentioning

confidence: 99%

Perspectives on Thermoelectric Energy Conversion in Ion-Exchange Membranes

Barragán

Kristiansen

Kjelstrup

2018

Entropy

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By thermoelectric power generation we mean the creation of electrical power directly from a temperature gradient. Semiconductors have been mainly used for this purpose, but these imply the use of rare and expensive materials. We show in this review that ion-exchange membranes may be interesting alternatives for thermoelectric energy conversion, giving Seebeck coefficients around 1 mV/K. Laboratory cells with Ag|AgCl electrodes can be used to find the transported entropies of the ions in the membrane without making assumptions. Non-equilibrium thermodynamics can be used to compute the Seebeck coefficient of this and other cells, in particular the popular cell with calomel electrodes. We review experimental results in the literature on cells with ion-exchange membranes, document the relatively large Seebeck coefficient, and explain with the help of theory its variation with electrode materials and electrolyte concentration and composition. The impact of the membrane heterogeneity and water content on the transported entropies is documented, and it is concluded that this and other properties should be further investigated, to better understand how all transport properties can serve the purpose of thermoelectric energy conversion.

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Ionic thermoelectric paper

Abstract: NFC–PSSNa composite paper combines high ionic conductivity, high ionic Seebeck coefficient and low thermal conductivity, resulting in an overall slightly better figure-of-merit than PSSNa.

Cited by 86 publications

References 37 publications

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

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

High Thermoelectric Performance in n‐Type Perylene Bisimide Induced by the Soret Effect

Perspectives on Thermoelectric Energy Conversion in Ion-Exchange Membranes

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