Article
Materials Science, Ceramics
Chuangchuang Ruan, Hongzhang Song, Mengmeng Fan, Haoshan Hao, Shaohui Liu
Summary: The addition of SiC nanoparticles affects the thermoelectric properties of the oxide Ca3Co4O9+delta samples, reducing electrical resistivity and thermal conductivity. With increasing SiC content, the electrical resistivity decreases, leading to a transition in conduction mechanism. This leads to lower thermal conductivity and improved ZT value under certain conditions.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Applied
Biplab Paul, Yun Zhang, Wenkai Zhu, Binbin Xing, Ganpati Ramanath, Theodorian Borca-Tasciuc, Per Eklund
Summary: We demonstrate that reducing thermal conductivity without hindering electronic transport can be achieved by controlling nanoporosity in the material. This finding provides a means of decoupling electronic and thermal properties in materials.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Uzma Hira, Syed Shahbaz Ali, Shoomaila Latif, Nini Pryds, Falak Sher
Summary: The study demonstrates that dual doping of Na and Mo cations is an effective strategy to improve the high-temperature thermoelectric properties of Ca3Co4O9, leading to enhanced Seebeck coefficient and reduced electrical resistivity and thermal conductivity. The thermoelectric power factor and dimensionless figure of merit obtained for the dual-doped materials are significantly improved compared to the pristine compound, showing great potential for thermoelectric renewable energy applications.
Article
Physics, Applied
Shin King Loh, Suan Cheng Chuah, Hanh Thi Thu Tran, Roslan Abd-Shukor, Tet Vui Chong
Summary: Polycrystalline NdBaSrCu3-xMxO7-delta samples (M 1/4 Ni or Zn for 0:00 <= x <= 0:10) were prepared and characterized. The effects of magnetic and non-magnetic particles substitution on the superconductivity of the tetragonal NdBaSrCu3O7-delta sample were investigated. The doping concentration did not significantly affect the a- and b-lattice parameters, but the c-lattice parameter increased with both Ni and Zn substitution. Both doping contents led to a decrease in the critical temperature, Tc, and critical current density, Jc(Tp). The results suggested that Zn doping had a greater effect on Tc due to the induction of unpaired charge carriers.
MODERN PHYSICS LETTERS B
(2023)
Article
Chemistry, Multidisciplinary
Uzma Hira, Syed Shahbaz Ali, Shoomaila Latif, Nini Pryds, Falak Sher
Summary: Layered structured Ca3Co4O9 shows great potential for thermoelectric renewable energy applications. In this study, dual doping of Na and Mo cations is found to significantly enhance the thermoelectric properties of Ca3Co4O9, with improved Seebeck coefficient, decreased electrical resistivity and thermal conductivity, and higher dimensionless figure of merit.
Article
Chemistry, Physical
Sivakumar Neelakandan, Krishnendu Biswas
Summary: In this study, the electrical conductivity and power factor of Ca3Co4O9 were enhanced by doping, while the thermal conductivity remained unchanged. This is of great significance for improving the thermoelectric performance of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Materials Science, Ceramics
M. V. Yurchenko, E. P. Antonova, E. S. Tropin, A. Yu Suntsov
Summary: Composite electrode materials were successfully obtained by mixing PrBaCo2O6-delta (PBCO) and Ca3Co4O9 +/-delta (CCO) oxides. Long term sintering and SOFC's operating conditions did not cause any interactions between the components, as shown by X-ray diffraction analysis. Increase in CCO content resulted in a noticeable decrease in thermal expansion coefficients, while the electrical conductivity of ceramics decreased negligibly. The obtained powdered composites had a developed microstructure and excellent adhesion with Ce0.8Sm0.2O1.9 dense support. The use of CCO as a thermal expansion coefficient lowering admixture to PBCO was found to be a more effective approach compared to ceria-based oxides.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Multidisciplinary
Lin Xu, Jingyuan Wu, Zhidong Liu, Weiao Kong, Chuanhe Wang, Yani Zhang, Shugang Tan
Summary: In this study, a series of Ni-doped layered oxyselenides were synthesized and investigated for their crystal structure and physical properties using X-ray diffraction, electric and thermo transport measurements, and DFT calculations.
Article
Chemistry, Physical
Sang-il Kim, Joonho Bang, Jiwoo An, Seokown Hong, Geukchan Bang, Weon Ho Shin, TaeWan Kim, Kimoon Lee
Summary: The effect of Br substitution on enhancing the thermoelectric properties of n-type layered SnSe2 was investigated, showing an increase in electrical conductivity and power factor with higher Br content. The Seebeck coefficient decreased as Br content increased, leading to an enhanced power factor at room temperature. The density functional theory calculations supported the findings by showing increased valley degeneracy in the conduction band minimum with Br substitution.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Siyi Xia, Delin Yang, Hongzhang Song, Shaohui Liu, Haoshan Hao
Summary: In this study, the authors achieved improvement in the thermoelectric properties of Ca3Co4O9+delta through double optimization. Elemental substitution reduced the resistivity of the material, while the introduction of appropriate amount of SiC nanoparticles reduced its thermal conductivity.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
K. A. Kuterbekov, K. Zh Bekmyrza, N. K. Aidarbekov, A. Nikonov, N. B. Pavzderin, V. R. Khrustov, I. Semenova, A. Medvedev, O. Gyrdasova
Summary: The potential of Ruddlesden-Popper-type La2NiO4+delta oxide cathode for solid oxide fuel cell applications was investigated with doping Co. Results showed that thermal expansion coefficient increases with Co content, while conductivity varies at different temperatures. The polarization resistance of cathodes in contact with different electrolytes is related to the Co content.
SOLID STATE IONICS
(2021)
Article
Chemistry, Physical
A. Urusova, A. Bryuzgina, E. Solomakhina, A. Kolchugin, D. Malyshkin, E. Pikalova, E. Filonova
Summary: This study investigates the functional properties of yttrium-doped Ca3Co4O9+3 complex oxides as potential cathode materials for proton-conducting fuel cells. The phase equilibria in the 1/2Y2O3-CaO-1/3Co3O4 system at 900℃ in air has been experimentally observed. The misfit-layered structure of Ca3-kYkCo4O9+3 solid solutions and their chemical compatibility with proton-conducting electrolytes have been established.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Electrical & Electronic
Shaohui Liu, Zhongyuan Xin, Yuan Wang, Haoshan Hao, Wang Jiao
Summary: Ca3Co4O9+delta compound thermoelectric ceramics with different SiC content were successfully prepared by spark plasma sintering. The effects of SiC content on the phase structure, microstructure and thermoelectric properties of the Ca3Co4O9+delta composite were systematically studied. SiC nanoparticles were evenly distributed in the Ca3Co4O9+delta ceramics and did not affect the phase structure. The grain size of the composite ceramics decreased with increasing SiC content. SiC had little effect on the Seebeck coefficient, but increased the conductivity initially and then decreased it. The thermal conductivity of the composite decreased and then increased with the increase in SiC content. The optimum SiC content was 0.06 wt% with a ZT value of 0.21 at 973K.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Zijing Zhang, Zhongnan Guo, Jiawei Lin, Fan Sun, Xue Han, Gang Wang, Wenxia Yuan
Summary: We successfully control the magnetism of CaMnBi2 through Cu doping, where the antiferromagnetic interaction is weakened and the ferromagnetic component is enhanced. The magnetoresistance is reduced upon Cu doping. This study suggests that CaMn1-xCuxBi2 system can serve as a suitable platform for investigating the interplay between magnetism and the topological state.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Zhiwei Zhang, Cuizhen Zhang, Qingwei Liao, Lei Qin, Yuan Deng, Lixing Liang
Summary: Polycrystalline materials of Ca3_xAgxCo4_yFeyO9 were prepared by sol-gel method with spark plasma sintering. The addition of both Ag and Fe can increase electrical conductivity and decrease thermal conductivity, leading to a coordinated regulation of electron and phonon transport in Ca2.95Ag0.05Co3.8Fe0.2O9 with a maximum ZT value of 0.25 at 1000 K, which is 34% larger than pure Ca3Co4O9.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Zong-Ren Yang, Wei-Hao Chen, Chia-Jyi Liu
JOURNAL OF ELECTRONIC MATERIALS
(2017)
Article
Materials Science, Multidisciplinary
Wei-Hao Chen, Zong-Ren Yang, Fei-Hung Lin, Chia-Jyi Liu
JOURNAL OF MATERIALS SCIENCE
(2017)
Article
Nanoscience & Nanotechnology
Ankam Bhaskar, Rung-Ting Lai, Kuo-Chuan Chang, Chia-Jyi Liu
SCRIPTA MATERIALIA
(2017)
Article
Chemistry, Multidisciplinary
Ankam Bhaskar, M. -S. Huang, Chia-Jyi Liu
Article
Chemistry, Physical
Fei-Hung Lin, Kuo-Chuan Chang, Zong-Ren Yang, Ahmad Gharleghi, Chia-Jyi Liu
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Multidisciplinary Sciences
En-Yu Liu, Fei-Hung Lin, Zong-Ren Yang, Chia-Jyi Liu
ROYAL SOCIETY OPEN SCIENCE
(2018)
Article
Engineering, Environmental
Chi-An Wu, Kuo-Chuan Chang, Fei-Hung Lin, Zong-Ren Yang, Ahmad Gharleghi, Ting-Zhan Wei, Chia-Jyi Liu
CHEMICAL ENGINEERING JOURNAL
(2019)
Article
Materials Science, Ceramics
Yu-Hsien Chu, Zhi-Quan Huang, Zong-Ren Yang, Fei-Hung Lin, Kuo-Chuan Chang, R. Suriakarthick, Chia-Jyi Liu
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2019)
Article
Chemistry, Physical
Immanuel Paulraj, Tzu-Fang Liang, Tzyy-Schiuan Yang, Chia-Hsin Wang, Jeng-Lung Chen, Yu-Wu Wang, Chia-Jyi Liu
ACS APPLIED ENERGY MATERIALS
(2020)
Article
Nanoscience & Nanotechnology
Immanuel Paulraj, Tzu-Fang Liang, Tzyy-Schiuan Yang, Chia-Hsin Wang, Jeng-Lung Chen, Yu Wu Wang, Chia-Jyi Liu
Summary: Organic conducting polymers show great potential as thermoelectric materials for wearable devices due to their excellent thermoelectric properties and advantages in cost, processing, toxicity, thermal conductivity, flexibility, weight, and large-scale applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
K. Veera Prabu, Vinothkumar Lourdhusamy, Immanuel Paulraj, M. Sridharan, Chia-Jyi Liu
Summary: The weighted mobility is a better descriptor of the optimal performance of electronic transport for thermoelectric materials. Sn doping on the electronegative Sb site lowered the electrical resistivity and enhanced the power factor of p-Mg3Sb2. The highest power factor of the Mg3Sb1.96Sn0.04 alloy is 2.55 mu W/cm-K-2 having 16 times enhancement as compared to the pristine Mg3Sb2 at 700 K.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Veera Prabu Kannan, Vinothkumar Lourdhusamy, Immanuel Paulraj, Chia-Jyi Liu, Sridharan Madanagurusamy
Summary: By adding ZnSb-4%Sb composite into the Mg3Sb2 host material, we have successfully synthesized various p-type Mg3-xZnxSb2/Sb composites, and with an increase in Zn content, the resistivity and zT value of the composites have improved.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Ceramics
Fei-Hung Lin, Chia-Jyi Liu
Summary: Bi2Te3-based thermoelectric materials are the largest segment of sales in thermoelectric products. In this study, we propose an energy-efficient synthesis method conforming to the 6th principle for green chemistry to manufacture Bi2Te3-based thermoelectric materials. By studying the formation mechanism of n-Bi2Te3 nanocomposites synthesized at room temperature, we found that nanosized Bi and Te would first form before the growth of n-Bi2Te3. To shorten the growth period, we developed a procedure using nanosized precursors of Bi, Sb, and Te, followed by heat treatment. The resulting zT values were 1.27 at 400 K for p-(Bi, Sb)(2)Te-3-Te composite and zT = 1 for n-Bi2Te3 at 425 K.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Immanuel Paulraj, Vinothkumar Lourdhusamy, Zong-Ren Yang, Chia-Hsin Wang, Chia- Jyi Liu
Summary: A new feasible strategy is adopted to fabricate hybrid inorganic-organic composites by soaking ZnSb in EG-treated PEDOT:PSS solution. The composites exhibit improved properties such as decreased lattice constants, increased bulk density, and decreased porosity with increasing soaking days. The hybrid ZnSb/EG-treated PEDOT:PSS composite with a soaking time of 30 days shows a higher power factor and lower thermal conductivity, resulting in an improved magnitude of zT (0.71 at 525 K).
JOURNAL OF POWER SOURCES
(2023)
Article
Materials Science, Ceramics
Ankara Bhaskar, Hsin-Chang Lai, Yen-Liang Liu, Chia-Jyi Liu
CERAMICS INTERNATIONAL
(2017)
