Liquid Exfoliated Graphene as Dopant for Improving the Thermoelectric Power Factor of Conductive PEDOT:PSS Nanofilm with Hydrazine Treatment

Xiong, Jinhua; Jiang, Fengxing; Shi, Hui; Xu, Jingkun; Liu, Congcong; Zhou, Weiqiang; Jiang, Qinglin; Zhu, Zengwei; Hu, Yong

doi:10.1021/acsami.5b03692

Cited by 132 publications

(60 citation statements)

References 62 publications

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“…The measured thermal conductivity of suspended single layer graphene is around 3000 to 5300 W m −1 K −1 , whose value decreases with increasing number of layers for the suspended sample and approaches very quickly to that of bulk graphite (around 1800 to 2100 W m −1 K −1 ) . However, the thermal conductivity of these carbon‐based nanocomposites is much smaller than the expected value, which therefore has potential applications as thermoelectric materials . CNTs‐ or graphene‐based PANI composites are found to have a relatively low thermal conductivity.…”

Section: Manipulation Of Thermal Conductivitymentioning

confidence: 93%

Thermal Transport in Conductive Polymer–Based Materials

Zhou

Chen

2019

Adv Funct Materials

139

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The demand for flexible conductive materials has motivated many recent studies on conductive polymer–based materials. However, the thermal conductivity of conductive polymers is relatively low, which may lead to serious heat dissipation problems for device applications. This review provides a summary of the fundamental principles for thermal transport in conductive polymers and their composites, and recent advancements in regulating their thermal conductivity. The thermal transport mechanisms in conductive polymer–based materials and up‐to‐date experimental approaches for measuring thermal conductivity are first summarized. Effective approaches for the regulation of thermal conductivity are then discussed. Finally, thermal‐related applications and future perspectives are given for conductive polymers and their composites.

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Section: Manipulation Of Thermal Conductivitymentioning

confidence: 93%

Thermal Transport in Conductive Polymer–Based Materials

Zhou

Chen

2019

Adv Funct Materials

139

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“…To highlight the significance of our results, we compare in Figure three main parameters (the preparation time, the applied temperature difference during the TE measurements, and the PF) for the most efficient PEDOT:PSS‐based TE materials from the literature which rely on different fillers or doping: multi‐walled carbon nanotubes (MWCNTs), single‐walled carbon nanotubes (SWCNTs), doping treatment with secondary dopants (labeled as “chemicals” in the graph), Te nanorods, and hydrazine treatment of graphene‐doped polymer …”

Section: Resultsmentioning

confidence: 99%

Flexible Thermoelectric Polymer Composites Based on a Carbon Nanotubes Forest

Yusupov

Stumpf

You

et al. 2018

Adv Funct Materials

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Polymer-based composites are of high interest in the field of thermoelectric (TE) materials because of their properties: abundance, low thermal conductivity, and nontoxicity. In applications, like TE for wearable energy harvesting, where low operating temperatures are required, polymer composites demonstrate compatible with the targeted specifications. The main challenge is reaching high TE efficiency. Fillers and chemical treatments can be used to enhance TE performance of the polymer matrix. The combined application of vertically aligned carbon nanotubes forest (VA-CNTF) is demonstrated as fillers and chemical post-treatment to obtain high-efficiency TE composites, by dispersing VA-CNTF into a poly (3,4-ethylenedioxythiophene) polystyrene sulfonate matrix. The VA-CNTF keeps the functional properties even in flexible substrates. The morphology, structure, composition, and functional features of the composites are thoroughly investigated. A dramatic increase of power factor is observed at the lowest operating temperature difference ever reported. The highest Seebeck coefficient and electrical conductivity are 58.7 µV K −1 and 1131 S cm −1 , respectively. The highest power factor after treatment is twice as high in untreated samples. The results demonstrate the potential for the combined application of VA-CNTF and chemical post-treatment, in boosting the TE properties of composite polymers toward the development of high efficiency, low-temperature, flexible TEs. ThermoelectricsThe ORCID identification number(s) for the author(s) of this article can be found under https://doi.

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“…At a graphene loading of 3 wt%, they observed a PF of 45.7 µW m −1 K −2 , higher than that (24.2 µW m −1 K −2 ) of neat PEDOT:PSS. Xu et al incorporated the liquid‐exfoliated graphene into commercial PEDOT:PSS and obtained a PF of 53.5 µW m −1 K −2 at the graphene loading of 3 wt% . Graphene/PANi composites were also been prepared .…”

Section: Compositesmentioning

confidence: 99%

“…There are a couple of different approaches to prepare graphene, such as mechanically exfoliation, CVD growth and chemically reduction of graphene oxide. The preparation approach affects the TE properties of the composites …”

Section: Compositesmentioning

confidence: 99%

Recent Development of Thermoelectric Polymers and Composites

Yao

Fan

Cheng

et al. 2018

Macromol. Rapid Commun.

232

148

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Thermoelectric materials can be used as the active materials in thermoelectric generators and as Peltier coolers for direct energy conversion between heat and electricity. Apart from inorganic thermoelectric materials, thermoelectric polymers have been receiving great attention due to their unique advantages including low cost, high mechanical flexibility, light weight, low or no toxicity, and intrinsically low thermal conductivity. The power factor of thermoelectric polymers has been continuously rising, and the highest ZT value is more than 0.25 at room temperature. The power factor can be further improved by forming composites with nanomaterials. This article provides a review of recent developments on thermoelectric polymers and polymer composites. It focuses on the relationship between thermoelectric properties and the materials structure, including chemical structure, microstructure, dopants, and doping levels. Their thermoelectric properties can be further improved to be comparable to inorganic counterparts in the near future.

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Liquid Exfoliated Graphene as Dopant for Improving the Thermoelectric Power Factor of Conductive PEDOT:PSS Nanofilm with Hydrazine Treatment

Cited by 132 publications

References 62 publications

Thermal Transport in Conductive Polymer–Based Materials

Thermal Transport in Conductive Polymer–Based Materials

Flexible Thermoelectric Polymer Composites Based on a Carbon Nanotubes Forest

Recent Development of Thermoelectric Polymers and Composites

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