Transport and Mechanical Properties of High-ZT Mg2.08Si0.4−x Sn0.6Sb x Thermoelectric Materials

Gao, Peng; Berkun, Isil; Schmidt, Robert D.; Luzenski, Matthew F.; Lu, Xu; Sarac, Patricia Bordon; Case, Eldon D.; Hogan, Timothy P.

doi:10.1007/s11664-013-2865-8

Cited by 76 publications

(66 citation statements)

References 37 publications

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“…[ 35 ] More importantly, n-type Mg 2 (Si, Sn) exhibits a high power factor and average ZT from 300 to 548 K along with a modest thermomechanical properties, [ 10,70 ] it is promising to pair p-type MgAgSb with n-type Mg 2 (Si, Sn) when the suitable contacts are found for Mg 2 (Si, Sn) from the current view. Since n-type Mg 2 (Si, Sn) has a low resistivity ≈7 × 10 −6 Ω m at 300 K, [ 10 ] lower resistivity by Li doping [ 33,34,36 ] wileyonlinelibrary.…”

Section: Tuning the Carrier Concentration Via LI Dopingmentioning

confidence: 99%

Lithium Doping to Enhance Thermoelectric Performance of MgAgSb with Weak Electron–Phonon Coupling

Liu

Wang

Mao

et al. 2016

Advanced Energy Materials

135

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Despite the unfavorable band structure with twofold degeneracy at the valence band maximum, MgAgSb is still an excellent p‐type thermoelectric material for applications near room temperature. The intrinsically weak electron–phonon coupling, reflected by the low deformation potential Edef ≈ 6.3 eV, plays a crucial role in the relatively high power factor of MgAgSb. More importantly, Li is successfully doped into Mg site to tune the carrier concentration, leading to the resistivity reduction by a factor of 3 and a consequent increase in power factor by ≈30% at 300 K. Low lattice thermal conductivity can be simultaneously achieved by all‐scale hierarchical phonon scattering architecture including high density of dislocations and nanoscale stacking faults, nanoinclusions, and multiscale grain boundaries. Collectively, much higher average power factor ≈25 μW cm−1 K−2 with a high average ZT ≈ 1.1 from 300 to 548 K is achieved for 0.01 Li doping, which would result in a high output power density ≈1.56 W cm−2 and leg efficiency ≈9.2% by calculations assuming cold‐side temperature Tc = 323 K, hot‐side temperature Th = 548 K, and leg length = 2 mm.

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Section: Tuning the Carrier Concentration Via LI Dopingmentioning

confidence: 99%

Lithium Doping to Enhance Thermoelectric Performance of MgAgSb with Weak Electron–Phonon Coupling

Liu

Wang

Mao

et al. 2016

Advanced Energy Materials

135

View full text Add to dashboard Cite

show abstract

“…N and P-types Mg 2 Si x Sn 1Àx alloys, with x varying from 0.2 to 0.8, have been deeply investigated for thermoelectrical applications in the 300-600°C temperature range [1][2][3][4][5][6][7][8][9][10][11][12]. Nonetheless, processing methods to elaborate such materials of interest are complex, with numerous subsequent steps, and time consuming [1][2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…Nonetheless, processing methods to elaborate such materials of interest are complex, with numerous subsequent steps, and time consuming [1][2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Microstructure investigations and thermoelectrical properties of an N-type magnesium–silicon–tin alloy sintered from a gas-phase atomized powder

et al. 2015

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“…[7][8][9] The determining factor in the development of ATEGs is the development of thermoelectric materials with higher ZT values. Intense research is therefore being carried out to implement thermoelectric modules based on mass-producible materials that can generate more power [10][11][12][13][14] and operate over a broader temperature range compared with conventional Bi 2 Te 3 -based solutions.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Test Bed Analysis of Gas Energy Balance for a Diesel Exhaust System Fit with a Thermoelectric Generator

Fuć

Lijewski

Ziółkowski

et al. 2017

Journal of Elec Materi

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Analysis of the energy balance for an exhaust system of a diesel engine fit with an automotive thermoelectric generator (ATEG) of our own design has been carried out. A special measurement system and dedicated software were developed to measure the power generated by the modules. The research object was a 1.3-l small diesel engine with power output of 66 kW. The tests were carried out on a dynamic engine test bed that allows reproduction of an actual driving cycle expressed as a function V = f(t), simulating drivetrain (clutch, transmission) operating characteristics, vehicle geometrical parameters, and driver behavior. Measurements of exhaust gas thermodynamic parameters (temperature, pressure, and mass flow) as well as the voltage and current generated by the thermoelectric modules were performed during tests of our own design. Based on the results obtained, the flow of exhaust gas energy in the entire exhaust system was determined along with the ATEG power output. The ideal area of the exhaust system for location of the ATEG was defined to ensure the highest thermal energy recovery efficiency.

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Transport and Mechanical Properties of High-ZT Mg2.08Si0.4−x Sn0.6Sb x Thermoelectric Materials

Cited by 76 publications

References 37 publications

Lithium Doping to Enhance Thermoelectric Performance of MgAgSb with Weak Electron–Phonon Coupling

Lithium Doping to Enhance Thermoelectric Performance of MgAgSb with Weak Electron–Phonon Coupling

Microstructure investigations and thermoelectrical properties of an N-type magnesium–silicon–tin alloy sintered from a gas-phase atomized powder

Dynamic Test Bed Analysis of Gas Energy Balance for a Diesel Exhaust System Fit with a Thermoelectric Generator

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