Point defect approach to enhance the thermoelectric performance of Zintl-phase BaAgSb

Huang, Yu-Ching; Chen, Chen; Zhang, Weiming; Li, Xiaofang; Xue, Wei; Wang, Xinyu; Liu, Yijie; Yao, Honghao; Zhang, Zongwei; Chen, Yue; Cao, Feng; Liu, Xingjun; Wang, Yumei; Zhang, Qian

doi:10.1007/s40843-020-1640-2

Cited by 22 publications

(20 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the Zintl-phase thermoelectric compounds, point defect engineering is an effective method to decrease the lattice thermal conductivity. ,− In order to reduce the lattice thermal conductivity of SrCuSb, a series of samples Sr 1.05‑ y Ba y CuSb ( y = 0, 0.1, 0.2, and 0.3) were prepared by isoelectronic alloying of Ba at the Sr site. The XRD patterns of Sr 1.05‑ y Ba y CuSb ( y = 0, 0.1, 0.2, and 0.3) are shown in Figure a.…”

Section: Resultsmentioning

confidence: 99%

“…As shown in Figure 1c 2d, the carrier mobility of Sr 1+x CuSb (x = 0, 0.03, and 0.05) is lower than that of SrAgSb, close to that of EuAgSb and EuCuSb, and much higher than that of Eu 2 ZnSb 2 and Sr 2 ZnSb 2 . 16,21,22 Because the fully occupied Ag−Sb and Cu−Sb frameworks are beneficial to the carrier transport, the Hall mobility (μ H ) follows the μ H ∝ T −1.5 relationship, indicating that the carrier scattering mechanism is dominated by acoustic phonon scattering at high temperature. The effective mass of Sr 1+x CuSb (x = 0, 0.03, and 0.05) was calculated using the single parabolic band (SPB) model and is shown in Figure 2e.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Realizing Enhanced Thermoelectric Performance in Zintl-Phase SrCuSb by Reducing the Thermal Conductivity

Wei

Chen²,

Yao

et al. 2023

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

Zintl-phase compounds have been extensively studied in recent years due to their phonon-glass and electron-crystal structure. As a ZrBeSi-type Zintl-phase compound, SrCuSb exhibits both high electrical transport properties and thermal conductivity because of the fully occupied anionic framework. In this work, the thermoelectric properties of SrCuSb were refined by Sr self-doping. The increased Sr content not only suppressed the secondary phase SrCu 2 Sb 2 but also lowered the carrier contribution to the thermal conductivity. A zT value of ∼0.36 was achieved for Sr 1.05 CuSb at 700 K. To further decrease the thermal conductivity, Ba was introduced to the alloy at the Sr site. Benefiting from the point defect scattering, the lattice thermal conductivity was reduced to ∼0.7 W K −1 m −1 at 760 K for the Sr 0.75 Ba 0.3 CuSb sample. Finally, a peak zT of ∼0.5 was obtained for Sr 0.75 Ba 0.3 CuSb at 773 K.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Realizing Enhanced Thermoelectric Performance in Zintl-Phase SrCuSb by Reducing the Thermal Conductivity

Wei

Chen²,

Yao

et al. 2023

ACS Appl. Energy Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Moreover, in ZrBeSi-type lattice, three different atomic coordinates can be occupied by various elements, implying a large room for developing analogs in this material family. To date, new ZrBeSitype compounds, e.g., BaAgSb [34,35], BaAgBi [36], SrAgSb [37], EuAgSb [37], and EuCuSb [37], have been reported to exhibit promising zT values, which shows great potentials for searching high-performance thermoelectric materials.…”

Section: Introduction mentioning

confidence: 99%

Planar Zintl-phase high-temperature thermoelectric materials XCuSb (X = Ca, Sr, Ba) with low lattice thermal conductivity

et al. 2022

View full text Add to dashboard Cite

A recent discovery of high-performance Mg3Sb2 has ignited tremendous research activities in searching for novel Zintl-phase compounds as promising thermoelectric materials. Herein, a series of planar Zintl-phase XCuSb (X = Ca, Sr, Ba) thermoelectric materials are developed by vacuum induction melting. All these compounds exhibit high carrier mobilities and intrinsic low lattice thermal conductivities (below 1 W·m−1·K−1 at 1010 K), resulting in peak p-type zT values of 0.14, 0.30, and 0.48 for CaCuSb, SrCuSb, and BaCuSb, respectively. By using BaCuSb as a prototypical example, the origins of low lattice thermal conductivity are attributed to the strong interlayer vibrational anharmonicity of Cu—Sb honeycomb sublattice. Moreover, the first-principles calculations reveal that n-type BaCuSb can achieve superior thermoelectric performance with the peak zT beyond 1.1 because of larger conducting band degeneracy. This work sheds light on the high-temperature thermoelectric potential of planar Zintl compounds, thereby stimulating intense interest in the investigation of this unexplored material family for higher zT values.

show abstract

“…The κc was estimated using Wiedemann-Franz relationship (κe = LσT), where L is the Lorenz number calculated using the SPB model [37]. Note BM-SnSe samples with smaller grain size did not show obvious suppression in the thermal conductivity, which is due to the very short phonon mean free path comparable to the lattice parameters of SnSe [5,38].…”

Section: Journal Of Advanced Ceramicsmentioning

confidence: 99%

Greatly enhanced mechanical properties of thermoelectric SnSe through microstructure engineering

Bin-hao¹,

Chen²,

Zhao³

et al. 2023

Journal of Advanced Ceramics

View full text Add to dashboard Cite

The outstanding thermoelectric materials SnSe is also known for its inferior mechanical properties, which bring great inconvenience for its application in thermoelectric devices. In this work, SnSe bulks were prepared via a sequential procedure of high-pressure synthesis, ball milling, and spark plasma sintering. The produced polycrystalline samples with a unique microstructure of tightly-bound quasi-equiaxed grains exhibited excellent mechanical properties. The Vickers hardness, compressive strength, and bending strength reached 1.1 GPa, 300 MPa, and 90 MPa, respectively, all of which are far superior to those of ordinary polycrystalline SnSe. Furthermore, the microstructures didn't deteriorate the thermoelectric performance. This work demonstrated an effective procedure to prepare polycrystalline microstructure-engineered SnSe materials, which not only show advantages in device applications, but also shed light on properties enhancement for other layer-structured thermoelectric materials.

show abstract

Point defect approach to enhance the thermoelectric performance of Zintl-phase BaAgSb

Cited by 22 publications

References 44 publications

Realizing Enhanced Thermoelectric Performance in Zintl-Phase SrCuSb by Reducing the Thermal Conductivity

Realizing Enhanced Thermoelectric Performance in Zintl-Phase SrCuSb by Reducing the Thermal Conductivity

Planar Zintl-phase high-temperature thermoelectric materials XCuSb (X = Ca, Sr, Ba) with low lattice thermal conductivity

Greatly enhanced mechanical properties of thermoelectric SnSe through microstructure engineering

Contact Info

Product

Resources

About