Nanostructured thermoelectric materials: Current research and future challenge

Chen, Zhigang; Han, Guang; Yang, Lei; Cheng, Liang; Zou, Jin

doi:10.1016/j.pnsc.2012.11.011

Cited by 704 publications

(383 citation statements)

References 106 publications

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“…[78] The difference may be caused by the presence of excess amount grain boundaries, which can decrease the thermal conductivity at the cost of electrical conductivity. [79][80][81] The thermoelectric properties of the Bi2Se3 pellet are presented in Figure 8 , the ZT value of our Bi2Se3 pellet is apparently higher than the literature value [82] and reaches 0.27 at 230 °C. The higher ZT is mainly due to the ultralow thermal conductivity caused by the presence of nanograins.…”

Section: Resultsmentioning

confidence: 49%

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Robust scalable synthesis of surfactant-free thermoelectric metal chalcogenide nanostructures

Han

et al. 2015

Nano Energy

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, S. Xue. (2015). Robust scalable synthesis of surfactant-free thermoelectric metal chalcogenide nanostructures. Nano Energy, Robust scalable synthesis of surfactant-free thermoelectric metal chalcogenide nanostructures AbstractA robust low-cost ambient aqueous method for the scalable synthesis of surfactant-free nanostructured metal chalcogenides (MaXb, M=Cu, Ag, Sn, Pb, and Bi; X=S, Se, and Te; a=1 or 2; and b=1 or 3) is developed in this work. The effects of reaction parameters, such as precursor concentration, ratio of precursors, and amount of reducing agent, on the composition, size, and shape of the resultant nanostructures have been comprehensively investigated. This environmentally friendly approach is capable of producing metal chalcogenide nanostructures in a one-pot reaction on a large scale, which were investigated for their thermoelectric properties towards conversion of waste heat into electricity. The results demonstrate that the thermoelectric properties of these metal chalcogenide nanostructures are strongly dependent on the types of metal chalcogenides, and their figure of merits are comparable with previously reported figures for their bulk or nanostructured counterparts.

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Section: Resultsmentioning

confidence: 49%

“…The higher ZT is mainly due to the ultralow thermal conductivity caused by the presence of nanograins. [79][80][81] dependence of ZT for our sample with that of single-crystal SnSe. [83] The maximum ZT of our sample is 0.38 at 300 °C, higher than that of single crystal SnSe (ZT = 0.21) at the same temperature.…”

Section: Resultsmentioning

confidence: 92%

Robust scalable synthesis of surfactant-free thermoelectric metal chalcogenide nanostructures

Han

et al. 2015

Nano Energy

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“…These materials are promising for power generators to transfer waste heat into electricity directly [2]. However, the application of thermoelectric materials is currently limited due to its poor efficiency.…”

Section: Introductionmentioning

confidence: 99%

Template-Free Bipotentiostatic Deposition of Thermoelectric BixTey Nano Arrays

Xin¹,

Wang²,

Zhao³

2017

MSCE

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Monodispersed Bi-Tenano arrays are achieved via template-free bipotentiostatic deposition. The diameter and length of individual nanorod is ~80 nm and ~250 nm respectively. The electrodeposition process is demonstrated to follow a two-step mechanism: an instantaneous reductive potential is applied to form dispersive nuclei, then a reverse oxidative potential strips partial Bi atoms to prevent further cross-growth. Repeatedly, the nano arrays film is obtained eventually. The thermoelectric properties of the obtained Bi-Tenano arrays such as electrical resistance, carrier density, Seebeck coefficient and power factor are measured to be 2.438 × 10 −4 Ω·m, 4.251 × 10 20 cm −3 , −25.892 μV·K −1 , 2.750 × 10 −6 W·m −1 ·K 2 , respectively.

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“…Thermoelectric materials can directly convert heat into electricity without moving parts [1,2]. The performance of a thermoelectric material is characterized by its dimensionless figure of merit (ZT), which is a function of materials' temperature-dependent properties [1,3], ZT = [S 2 /( e+  L )]T, where S, σ,  e ,  L , and T are the Seebeck coefficient, electrical conductivity, electronic thermal conductivity, lattice thermal conductivity, and absolute temperature, respectively [3,4].…”

Section: Introductionmentioning

confidence: 99%