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A Mixed Ion/Electron Thermoelectric Generator with Ultrahigh Steady Thermopower by Exploring Both the Hole Tunneling and Ion Accumulations.

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Title: A Mixed Ion/Electron Thermoelectric Generator with Ultrahigh Steady Thermopower by Exploring Both the Hole Tunneling and Ion Accumulations.
Authors: Qian, Qi1,2 (AUTHOR), Cheng, Hanlin1 (AUTHOR) msech@nus.edu.sg, Xie, Hang3 (AUTHOR), Wu, Yihong3 (AUTHOR), Fang, Yuanlai1 (AUTHOR), Le, Qiujian1 (AUTHOR), Yue, Shizhong1 (AUTHOR), Ouyang, Jianyong1,2 (AUTHOR) mseoj@nus.edu.sg
Source: Advanced Energy Materials. 5/27/2025, Vol. 15 Issue 20, p1-12. 12p.
Subject Terms: *Thermoelectric generators, *Thermoelectric power, *Graphene oxide, *Ionic conductivity, *Quantum tunneling, *Thermophoresis, *Ions
Abstract: Ionic thermoelectric (TE) materials are promising candidate for efficient heat harvesting mainly because they can have a thermopower higher than the electronic TE materials by 2–3 orders in magnitude. However, they cannot be directly exploited in conventional thermoelectric generators (TEGs) since ions cannot transport across the electrodes into the external circuit, and they cannot be used to harvest heat under steady temperature gradient. Here, a mixed ion/electron thermoelectric generator (MTEG) is reported that can continuously generate electricity under not only temperature fluctuation but also steady temperature gradient. It is consisted of a layer of an ionogel added with reduced graphene oxide (rGO). The ionic liquid is an ionic conductor, while rGO is an electronic conductor. The MTEG can supply a constant output voltage to the external load under steady temperature gradient, and the behavior is similar to that of the conventional TEGs, particularly when the external resistance is relatively high. The thermopower can be more than 7.0 mV K−1, higher than the Seebeck coefficient of the best electronic TE materials by 1–2 orders in magnitude. The operation mechanism is attributed to the hole tunneling across the rGO sheets and the high thermopower due to the Soret effect of the ions. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
FullText Text:
  Availability: 0
Header DbId: enr
DbLabel: Energy & Power Source
An: 185491403
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: A Mixed Ion/Electron Thermoelectric Generator with Ultrahigh Steady Thermopower by Exploring Both the Hole Tunneling and Ion Accumulations.
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  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Qian%2C+Qi%22">Qian, Qi</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cheng%2C+Hanlin%22">Cheng, Hanlin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> msech@nus.edu.sg</i><br /><searchLink fieldCode="AR" term="%22Xie%2C+Hang%22">Xie, Hang</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Yihong%22">Wu, Yihong</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fang%2C+Yuanlai%22">Fang, Yuanlai</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Le%2C+Qiujian%22">Le, Qiujian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yue%2C+Shizhong%22">Yue, Shizhong</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ouyang%2C+Jianyong%22">Ouyang, Jianyong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> mseoj@nus.edu.sg</i>
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  Data: <searchLink fieldCode="JN" term="%22Advanced+Energy+Materials%22">Advanced Energy Materials</searchLink>. 5/27/2025, Vol. 15 Issue 20, p1-12. 12p.
– Name: Subject
  Label: Subject Terms
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  Data: *<searchLink fieldCode="DE" term="%22Thermoelectric+generators%22">Thermoelectric generators</searchLink><br />*<searchLink fieldCode="DE" term="%22Thermoelectric+power%22">Thermoelectric power</searchLink><br />*<searchLink fieldCode="DE" term="%22Graphene+oxide%22">Graphene oxide</searchLink><br />*<searchLink fieldCode="DE" term="%22Ionic+conductivity%22">Ionic conductivity</searchLink><br />*<searchLink fieldCode="DE" term="%22Quantum+tunneling%22">Quantum tunneling</searchLink><br />*<searchLink fieldCode="DE" term="%22Thermophoresis%22">Thermophoresis</searchLink><br />*<searchLink fieldCode="DE" term="%22Ions%22">Ions</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Ionic thermoelectric (TE) materials are promising candidate for efficient heat harvesting mainly because they can have a thermopower higher than the electronic TE materials by 2–3 orders in magnitude. However, they cannot be directly exploited in conventional thermoelectric generators (TEGs) since ions cannot transport across the electrodes into the external circuit, and they cannot be used to harvest heat under steady temperature gradient. Here, a mixed ion/electron thermoelectric generator (MTEG) is reported that can continuously generate electricity under not only temperature fluctuation but also steady temperature gradient. It is consisted of a layer of an ionogel added with reduced graphene oxide (rGO). The ionic liquid is an ionic conductor, while rGO is an electronic conductor. The MTEG can supply a constant output voltage to the external load under steady temperature gradient, and the behavior is similar to that of the conventional TEGs, particularly when the external resistance is relatively high. The thermopower can be more than 7.0 mV K−1, higher than the Seebeck coefficient of the best electronic TE materials by 1–2 orders in magnitude. The operation mechanism is attributed to the hole tunneling across the rGO sheets and the high thermopower due to the Soret effect of the ions. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=185491403
RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1002/aenm.202404522
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      – Code: eng
        Text: English
    PhysicalDescription:
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        PageCount: 12
        StartPage: 1
    Subjects:
      – SubjectFull: Thermoelectric generators
        Type: general
      – SubjectFull: Thermoelectric power
        Type: general
      – SubjectFull: Graphene oxide
        Type: general
      – SubjectFull: Ionic conductivity
        Type: general
      – SubjectFull: Quantum tunneling
        Type: general
      – SubjectFull: Thermophoresis
        Type: general
      – SubjectFull: Ions
        Type: general
    Titles:
      – TitleFull: A Mixed Ion/Electron Thermoelectric Generator with Ultrahigh Steady Thermopower by Exploring Both the Hole Tunneling and Ion Accumulations.
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            NameFull: Qian, Qi
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            – D: 27
              M: 05
              Text: 5/27/2025
              Type: published
              Y: 2025
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              Value: 15
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            – TitleFull: Advanced Energy Materials
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