A microstructuring route to enhanced thermoelectric efficiency of reduced graphene oxide films

Mehmood, Tariq; Kim, Jin Ho; Lee, Do-Joong; Dizhur, S. E.; Odessey, Rachel; Hirst, Elizabeth S.; Osgood, R. M.; Sayyad, Muhammad Hassan; Munawar, Munawar Ali; Xu, Jimmy

doi:10.1088/2053-1591/ab18d7

Cited by 7 publications

(5 citation statements)

References 30 publications

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“…Previously there have some reports on rGO and rGO based composites as efficient thermoelectric materials. [28][29][30][31] For example, Mehmood et al reported the thermoelectric power factor of 2.21 Â 10 À3 mW K À2 m À1 for flat rGO film. 28 The power factor of B0.93 mW K À2 m À1 for rGO films obtained from 4 h hydrothermal reactions and deposited on a glass substrate.…”

Section: Resultsmentioning

confidence: 99%

“…[28][29][30][31] For example, Mehmood et al reported the thermoelectric power factor of 2.21 Â 10 À3 mW K À2 m À1 for flat rGO film. 28 The power factor of B0.93 mW K À2 m À1 for rGO films obtained from 4 h hydrothermal reactions and deposited on a glass substrate. 29 In another study, the power factor value of B0.43 mW K À2 m À1 was reported for rGO with PANI composite material obtained by spark plasma sintering (rGO : PANI as 30 : 70).…”

Section: Resultsmentioning

confidence: 99%

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Enhanced thermoelectric properties exhibited by unreduced freestanding graphene oxide/carbon nanotube membranes

et al. 2021

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Enhanced thermoelectric properties exhibited by unreduced freestanding graphene oxide/carbon nanotube membranes

et al. 2021

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“…Wrinkle structure design is also applied for the construction of stretchable thermoelectric generators. [46,78] Kim et al designed a multidimensional nanocomposite composed of tungsten disulfide (WS 2 ) nanosheets (NSs) and SWCNTs and transferred onto a prestrained rubber substrate (Figure 6d). [46] The as-obtained thermoelectric materials can maintain a steady Seebeck coefficient and power factor of ≈65 µV K −1 and ≈46 µW m −1 K −2 at 30% tensile strain (Figure 6e).…”

Section: Wrinkle Structurementioning

confidence: 99%

“…Wrinkle structure design is also applied for the construction of stretchable thermoelectric generators. [ 46,78 ] Kim et al. designed a multidimensional nanocomposite composed of tungsten disulfide (WS 2 ) nanosheets (NSs) and SWCNTs and transferred onto a prestrained rubber substrate (Figure 6d).…”

Section: Structure Design For Stretchable Thermoelectric Materials An...mentioning

confidence: 99%

Stretchable Thermoelectrics: Strategies, Performances, and Applications

Wang

et al. 2021

Adv Funct Materials

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With the rapid development of intelligent devices, flexible robots, medical monitors, and electronic skins, stretchable wireless power supplies are in great demand. Thermoelectric devices have proven to be promising candidates for wearable electronics owing to their significant conversion capability from low-grade waste heat in the environment to electric energy. Therefore, stretchable thermoelectric generators attract widespread attention and remarkable progress has been made recent years. In this review, various design strategies are comprehensively overviewed from the perspective of material composition design and structure design for enhanced stretchability of thermoelectric materials and devices. Furthermore, the thermoelectric performance and multifunctional applications of stretchable materials and devices are emphasized. Finally, the challenges and prospects in the development and applications of stretchable thermoelectrics are presented.

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“…The enhancement of electrical conductivity is achieved through a mild reduction in graphene oxide (i.e., rGO) [20,25]. Thus, rGO has recently become a main subject of study due to its thermoelectrical applications [9,26]. It has been reported that rGO can also be used as an additive to oxides in order to control their thermoelectric performance [27,28].…”

Section: Introductionmentioning

confidence: 99%

Graphene-Based Composites for Thermoelectric Applications at Room Temperature

Harizanova,

Vulchev,

Stoyanova

2023

Materials

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The thermoelectric materials that operate at room temperature represent a scientific challenge in finding chemical compositions with three optimized, independent parameters, namely electrical and thermal conductivity and the Seebeck coefficient. Here, we explore the concept of the formation of hybrid composites between carbon-based materials and oxides, with the aim of modifying their thermoelectric performance at room temperature. Two types of commercially available graphene-based materials are selected: N-containing reduced graphene oxide (NrGO) and expanded graphite (ExGr). Although the NrGO displays the lowest thermal conductivity at room temperature, the ExGr is characterized by the lowest electrical resistivity and a negative Seebeck coefficient. As oxides, we choose two perspective thermoelectric materials: p-type Ca3Co4O9 and n-type Zn0.995Al0.005O. The hybrid composites were prepared by mechanical milling, followed by a pelleting. The thermoelectric efficiency was evaluated on the basis of its measured electrical resistivity, Seebeck coefficient and thermal conductivity at room temperature. It was found that that 2 wt.% of ExGr or NrGO leads to an enhancement of the thermoelectric activity of Ca3Co4O9, while, for Zn0.995Al0.005O, the amount of ExGr varies between 5 and 20 wt.%. The effect of the composites’ morphology on the thermoelectric properties is discussed on the basis of SEM/EDS experiments.

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A microstructuring route to enhanced thermoelectric efficiency of reduced graphene oxide films

Cited by 7 publications

References 30 publications

Enhanced thermoelectric properties exhibited by unreduced freestanding graphene oxide/carbon nanotube membranes

Enhanced thermoelectric properties exhibited by unreduced freestanding graphene oxide/carbon nanotube membranes

Stretchable Thermoelectrics: Strategies, Performances, and Applications

Graphene-Based Composites for Thermoelectric Applications at Room Temperature

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