Enhanced thermoelectric performance of reduced graphene oxide incorporated bismuth-antimony-telluride by lattice thermal conductivity reduction

Shin, Weon Ho; Ahn, Kyunghan; Jeong, Mahn; Yoon, Jeong Seop; Song, Jae Min; Lee, Soonil; Seo, Won Seon; Lim, Young Soo

doi:10.1016/j.jallcom.2017.05.204

Cited by 58 publications

(34 citation statements)

References 33 publications

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“…4(c) and (d), modied GO combined well with the matrix and distributed uniformly. [30][31][32] Fig. 4(e) and (f) illustrate the formation of heat conduction pathways with the increasing weight percentage of modied GO in the composite.…”

Section: Semmentioning

confidence: 99%

Surface modification and thermal performance of a graphene oxide/novolac epoxy composite

Fang

et al. 2018

RSC Adv.

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Functionalized graphene oxide (GO) was successfully modified by grafting 1,3,5-triglycidylisocyanurate (TGIC) onto the surface of GO. The modified GO was then added to a novolac epoxy composite at various volume fractions to improve the interfacial compatibility between the filler and matrix. Samples of the modified GO/novolac epoxy composite were fabricated through the hot-pressing method.Microstructural analysis revealed that the modified GO dispersed well in the matrix and formed thermal conductive pathways across the matrix. The thermal degradation temperature of 50% weight loss of the modified GO/novolac epoxy composite was 166 C higher than that of the novolac epoxy. The data for loss factor tan d demonstrated that when the composite contained 36.8 wt% of modified GO, the glass transition temperature of the modified GO/novolac epoxy composite was 222 C, which is 90 C higher than that of the novolac epoxy. The thermal conductivity of the modified GO/novolac epoxy composite. Results indicated that the incorporation of surface-modified GO into the novolac epoxy positively affects the thermal conductivity and various properties of the modified GO/novolac epoxy composite.

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Section: Semmentioning

confidence: 99%

Surface modification and thermal performance of a graphene oxide/novolac epoxy composite

Fang

et al. 2018

RSC Adv.

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“…Carbon nanotubes and graphene have shown high electrical conductivity, high carrier mobility, and high mechanical properties [10,11], and have been widely used in the research on inorganic TE composite materials [12][13][14][15][16][17][18][19]. For example, Dong et al [12] prepared PbTe/graphene nanocomposite powders by a wet chemical method, and then sintered the as-prepared powders by a spark plasma sintering (SPS) process at 580 • C, and a ZT value of 0.7 was obtained at 670 K for the composite with 5% mass ratio of graphene: PbTe.…”

Section: Introductionmentioning

confidence: 99%

“…Ju et al [13] fabricated Bi 2 Te 3 nanowire (NW)/graphene composite films by wet chemical synthesis combined with a sintering process, and a ZT value of 0.2 was obtained for the composite film with 20 wt% Bi 2 Te 3 NWs at 300 K. Liang et al [14] prepared Bi 2 Te 3 /graphene bulk materials by a hydrothermal process combining SPS method, and a ZT value of 0.21 was obtained for the composite with 0.2 vol.% graphene at 475 K. Agarwal et al [15] prepared Bi 2 Te 3 /graphene bulk materials by a cold pressing method, and a ZT value of 0.92 was obtained for the composite with 0.05 wt% graphene at 402 K. Kumar et al [16] synthesized Bi 2 Te 3 /reduced graphene oxide (rGO) nanocomposites by a refluxing method, and then pressed the as-prepared nanocomposites into pellets; a ZT value of~0.35 was obtained for the pellet at~340 K. Zhang et al [17] reported Bi 0.4 Sb 1.6 Te 3 bulk materials by a high-pressure and high-temperature synthesis and high pressure sintering method, and a ZT value of 1.26 at 423 K was obtained for the composite with 0.05 wt% graphene. Ju et al [18] fabricated Bi 2 Te 3 NW/graphene bulk materials by a wet-chemical synthetic route and subsequent sintering process, and a ZT value of 0.4 was obtained for the composite with 1 wt% graphene at 300 K. Shin et al [19] prepared rGO/Bi 0.36 Sb 1.64 Te 3 composites by a melt spinning process combining SPS method, and a ZT value of 1.16 was achieved for the composite with 0.4 vol.% rGO at 393 K.…”

Section: Introductionmentioning

confidence: 99%

Thermoelectric Properties of Reduced Graphene Oxide/Bi2Te3 Nanocomposites

et al. 2019

Energies

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Reduced graphene oxide (rGO)/Bi2Te3 nanocomposite powders with different contents of rGO have been synthesized by a one-step in-situ reductive method. Then, rGO/Bi2Te3 nanocomposite bulk materials were fabricated by a hot-pressing process. The effect of rGO contents on the composition, microstructure, TE properties, and carrier transportation of the nanocomposite bulk materials has been investigated. All the composite bulk materials show negative Seebeck coefficient, indicating n-type conduction. The electrical conductivity for all the rGO/Bi2Te3 nanocomposite bulk materials decreased with increasing measurement temperature from 25 °C to 300 °C, while the absolute value of Seebeck coefficient first increased and then decreased. As a result, the power factor of the bulk materials first increased and then decreased, and a power factor of 1340 μWm−1K−2 was achieved for the nanocomposite bulk materials with 0.25 wt% rGO at 150 °C.

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“…They reported a reduced κ lat of 0.33 Wm −1 K −1 (Figure D) and an enhanced ZT value around 1.86 at 320 K. Besides, Yang et al synthesized n ‐type Bi 2 Te 3 nanostructures and showed an ultra‐low κ lat of ~0.2 Wm −1 K −1 due to high density grain boundaries via dislocations . Moreover, Shin et al reported a low κ lat of 0.63 Wm −1 K −1 for reduced graphene oxide (RGO) incorporated Bi 0.36 Sb 1.64 Te 3 composites …”

Section: High Performance Inorganic Te Materialsmentioning

confidence: 99%

Inorganic thermoelectric materials: A review

et al. 2020

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Summary Thermoelectric generator, which converts heat into electrical energy, has great potential to power portable devices. Nevertheless, the efficiency of a thermoelectric generator suffers due to inefficient thermoelectric material performance. In the last two decades, the performance of inorganic thermoelectric materials has been significantly advanced through rigorous efforts and novel techniques. In this review, major issues and recent advancements that are associated with the efficiency of inorganic thermoelectric materials are encapsulated. In addition, miscellaneous optimization strategies, such as band engineering, energy filtering, modulation doping, and low dimensional materials to improve the performance of inorganic thermoelectric materials are reported. The methodological reviews and analyses showed that all these techniques have significantly enhanced the Seebeck coefficient, electrical conductivity, and reduced the thermal conductivity, consequently, improved ZT value to 2.42, 2.6, and 1.85 for near‐room, medium, and high temperature inorganic thermoelectric material, respectively. Moreover, this review also focuses on the performance of silicon nanowires and their common fabrication techniques, which have the potential for thermoelectric power generation. Finally, the key outcomes along with future directions from this review are discussed at the end of this article.

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Enhanced thermoelectric performance of reduced graphene oxide incorporated bismuth-antimony-telluride by lattice thermal conductivity reduction

Cited by 58 publications

References 33 publications

Surface modification and thermal performance of a graphene oxide/novolac epoxy composite

Surface modification and thermal performance of a graphene oxide/novolac epoxy composite

Thermoelectric Properties of Reduced Graphene Oxide/Bi2Te3 Nanocomposites

Inorganic thermoelectric materials: A review

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