High thermoelectric performance of NaF-doped Bi2Ca2Co2O  ceramic samples

Dong, Song‐Tao; Yu, Miao-Cheng; Fu, Zhuang; Lv, Yang‐Yang; Yao, Shu‐Hua; Chen, Y.B.

doi:10.1016/j.jmrt.2022.01.102

Cited by 8 publications

(3 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It plays a significant role in addressing the challenges posed by the energy and environmental crises [1][2][3]. Numerous TE materials are currently under exploration for power generation and solidstate cooling applications, leveraging the Seebeck and Peltier effects, respectively [4], such as skutterudites [5], half-Heusler compounds [6], Zintl phases [7], chalcogenides [8], oxides [9,10], and high-entropy alloys [11]. Commonly, the conversion efficiency of TE materials is assessed using the dimensionless figure of merit, ZT = S 2 σT/κ, where S, σ, T, and κ stand for the Seebeck coefficient, electrical conductivity, absolute temperature in Kelvin, and total thermal conductivity (comprising lattice part κ lat and electronic part κ ele ), respectively [12,13].…”

Section: Introductionmentioning

confidence: 99%

Realizing the Ultralow Lattice Thermal Conductivity of Cu3SbSe4 Compound via Sulfur Alloying Effect

Zhao,

Han,

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

Cu3SbSe4 is a potential p-type thermoelectric material, distinguished by its earth-abundant, inexpensive, innocuous, and environmentally friendly components. Nonetheless, the thermoelectric performance is poor and remains subpar. Herein, the electrical and thermal transport properties of Cu3SbSe4 were synergistically optimized by S alloying. Firstly, S alloying widened the band gap, effectively alleviating the bipolar effect. Additionally, the substitution of S in the lattice significantly increased the carrier effective mass, leading to a large Seebeck coefficient of ~730 μVK−1. Moreover, S alloying yielded point defect and Umklapp scattering to significantly depress the lattice thermal conductivity, and thus brought about an ultralow κlat ~0.50 Wm−1K−1 at 673 K in the solid solution. Consequently, multiple effects induced by S alloying enhanced the thermoelectric performance of the Cu3SbSe4-Cu3SbS4 solid solution, resulting in a maximum ZT value of ~0.72 at 673 K for the Cu3SbSe2.8S1.2 sample, which was ~44% higher than that of pristine Cu3SbSe4. This work offers direction on improving the comprehensive TE in solid solutions via elemental alloying.

show abstract

Section: Introductionmentioning

confidence: 99%

Realizing the Ultralow Lattice Thermal Conductivity of Cu3SbSe4 Compound via Sulfur Alloying Effect

Zhao,

Han,

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…This can be calculated using the equation ZT = S 2 σT/κ. In this equation, S, σ, T, and κ represent the Seebeck coefficient, electrical conductivity, absolute temperature, and thermal conductivity, respectively [3][4][5]. Nonetheless, the interdependence of S, σ, and κ presents a challenge in simultaneously optimizing multiple parameters and enhancing thermoelectric performance.…”

Section: Introductionmentioning

confidence: 99%

Effect of NaF Doping on the Microstructure and Thermoelectric Performance of BiCuSeO Ceramics

Pei,

Xiang,

Sun

et al. 2023

Coatings

Self Cite

View full text Add to dashboard Cite

The layered oxyselenide BiCuSeO has attracted significant attention due to its ability to demonstrate low thermal conductivity and a high Seebeck coefficient. This research project involved the synthesis of Bi1−xNaxCuSeO1−xFx (x = 0, 0.05, 0.10, 0.15, and 0.20) ceramics using high-energy ball milling and cold isostatic pressing techniques. A comprehensive investigation was conducted to examine the influence of co−doping NaF on the thermoelectric properties of BiCuSeO ceramics. The substitution of Bi3+ with Na+ introduces a substantial number of holes, resulting in a remarkable improvement in the electrical conductivity and power factor. The conductivity was significantly increased from 9.10 S cm−1 (BiCuSeO) to 94.5 S cm−1 (Bi0.85Na0.15CuSeO0.85F0.15) at 323 K. Additionally, at 823 K, the power factor of the Bi0.85Na0.15CuSeO0.85F0.15 sample reached 44.8 × 10−5 W/m K2. Furthermore, the Bi1−xNaxCuSeO1−xFx ceramics demonstrated a minimum thermal conductivity of 0.43 W m−1 K−1. Consequently, the Bi0.85Na0.15CuSeO0.85F0.15 sample achieved a maximum ZT value of 0.78, which is 7.09 times higher than that of the pure BiCuSeO sample (0.11).

show abstract

“…Thus, developing high-performance TE materials and improving their TE properties has become an important research focus. Based on the concept of a phonon glass electronic crystal, layered materials can separately regulate electrical and thermal conductivities, thereby producing TE materials with excellent TE performance [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ta Doping on the Microstructure and Thermoelectric Properties of Bi2O2Se

Jiang

Dong

et al. 2022

Metals

Self Cite

View full text Add to dashboard Cite

In this study, Bi2−xTaxO2Se (x = 0, 0.02, 0.04, 0.06, and 0.08) ceramics were prepared using a synthesis method combining high-energy ball milling and cold pressing. Furthermore, the effects of tantalum (Ta) doping on the microstructure and thermoelectric properties of Bi2O2Se were systematically investigated. The results indicate that Ta doping effectively improves the carrier concentration and mobility, thus increasing the electrical conductivity from 8.75 S cm−1 to 39.03 S cm−1 at 323 K. Consequently, the power factor is improved, reaching a maximum value of 124 μW m−1 K−2 for the Bi1.92Ta0.08O2Se sample at 773 K. Moreover, the thermal conductivity of Bi1.96Ta0.04O2Se is reduced to 0.50 Wm−1 K−1. Finally, the maximum dimensionless figure of merit (ZT) value of the Bi1.94Ta0.06O2Se sample reached 0.18, which was 64% higher than that of Bi2O2Se (0.11). These results indicate that Ta doping and high-energy ball milling can optimize the electrical and thermal properties and thus improve the thermoelectric properties of ceramics.

show abstract

High thermoelectric performance of NaF-doped Bi2Ca2Co2O ceramic samples

Cited by 8 publications

References 40 publications

Realizing the Ultralow Lattice Thermal Conductivity of Cu3SbSe4 Compound via Sulfur Alloying Effect

Realizing the Ultralow Lattice Thermal Conductivity of Cu3SbSe4 Compound via Sulfur Alloying Effect

Effect of NaF Doping on the Microstructure and Thermoelectric Performance of BiCuSeO Ceramics

Effect of Ta Doping on the Microstructure and Thermoelectric Properties of Bi2O2Se

Contact Info

Product

Resources

About