Article
Chemistry, Physical
Vikash Sharma, Divya Sharma, Ranu Bhatt, Pankaj K. Patro, Gunadhor Singh Okram
Summary: We report on the thermoelectric properties of nickel-doped Ag2-xNixTe nanostructures in a certain temperature range. The material undergoes a metal-insulator transition with increasing nickel doping concentration. The electrical resistivity and Seebeck coefficient show linear relationships with temperature. The material achieves higher thermoelectric coefficient through a sharp decrease in thermal conductivity associated with a structural phase transition.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Energy & Fuels
Okmin Park, Kyu Hyoung Lee, Sang Jeong Park, Se Woong Lee, Sang-il Kim
Summary: This study reports the improved thermoelectric properties of singly and lightly Pb-doped Sb2Te3 polycrystalline alloys, with increased carrier transport properties and electrical conductivity, decreased Seebeck coefficient, and reduced lattice thermal conductivity. The maximum thermoelectric figure of merit achieved is 0.97, which is the highest reported value for singly-doped Sb2Te3-based alloys. The maximum energy conversion efficiency is calculated to be 9.0% for a temperature difference of 350 K, surpassing other singly or codoped Sb2Te3 alloys.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Zhong-Zhen Luo, Songting Cai, Shiqiang Hao, Trevor P. Bailey, Yubo Luo, Wenjun Luo, Yan Yu, Ctirad Uher, Christopher Wolverton, Vinayak P. Dravid, Zhigang Zou, Qingyu Yan, Mercouri G. Kanatzidis
Summary: Zn plays a crucial role in enhancing the thermoelectric performance of Ga-doped PbTe by improving electronic transport properties and reducing lattice thermal conductivity, resulting in a significant increase in the figure of merit.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Physical
Pradeep Kumar Sharma, T. D. Senguttuvan, V. K. Sharma, Pankaj Patro, Sujeet Chaudhary
Summary: In this study, the thermoelectric performance of PbTe compound was significantly improved through bismuth doping and dispersing SiC nanoparticles. Bismuth doping improved the electrical conductivity, while SiC nanoparticles regulated the Seebeck coefficient and suppressed the lattice thermal conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Riddhimoy Pathak, Debattam Sarkar, Kanishka Biswas
Summary: By co-doping Ag and Mg in SnTe, the TE performance can be significantly improved, enhancing the Seebeck coefficient and reducing thermal conductivity to achieve a high figure of merit at 865 K.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Pathan Sharief, Peyala Dharmaiah, Babu Madavali, Jun Woo Song, Jin Kyu Lee, Jong Hyeon Lee, Soon-Jik Hong
Summary: This study proposes a layered structure approach to improve the performance of thermoelectric materials by arranging different microstructure materials in a layered manner, optimizing the electrical conductivity and Seebeck coefficient, and thereby increasing the ZT value.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Environmental
Huynh Thanh-Nam, Madavali Babu, Hayk H. Nersisyan, Hong Soon-Jik, Lee Jin-Kyu, Kim Ki-Buem, Song Gian, Lee Jong-Hyeon
Summary: This study presents a novel approach to improve the thermoelectric performance by introducing LaVO3 nanoparticles into the Cu0.07Bi0.5Sb1.5Te3 matrix, forming incoherent interfaces. The incoherent interfaces enhance the electrical conductivity and suppress the decrease in Seebeck coefficients. In addition, the incoherent interfaces reduce the thermal conductivity through enhanced phonon scattering mechanisms. The sample with 5 wt% LVO achieves a significant improvement in thermoelectric figure of merit.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Yitong Guo, Jingyang Du, Meihua Hu, Bin Wei, Taichao Su, Aiguo Zhou
Summary: In this study, the thermoelectric performance of Bi2Te3 was improved by incorporating Mo2C MXene, a two-dimensional material with moderate thermoelectric performance. The properties of Mo2C MXene were characterized, and it was found to be an N-type conductor with a Seebeck coefficient of -9.25 µV/K. The composite powders of Bi2Te3/Mo2C MXene were prepared and the resulting bulk samples showed enhanced thermoelectric properties, with a ZT value of 0.26 at 473 K, 78.6% higher than that of pure Bi2Te3. This is the first report on regulating thermoelectric performance using Mo2C MXene.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Xiaohe Zhang, Lin Sun, Peng Jiang, Xinhe Bao
Summary: This study successfully modulates the concentration of vacancies and grain size in oriented Cd-doped AgSbTe2 films, improving the electrical conductivity and power factor. The thermal conductivity of the AgSbTe2-based thin films is significantly reduced by the scattering induced by nanostructures and grain boundaries. The research demonstrates that the modulation of vacancies and microstructures is a feasible way to enhance the TE performance of AgSbTe2-based films.
MATERIALS TODAY ENERGY
(2023)
Article
Engineering, Environmental
Ahmed Gamal El-Shamy
Summary: Recently, there has been a growing interest in thermoelectric materials and nano-composite materials based on conducting polymers due to their unique thermoelectric functions as well as flexibility, harmlessness, and abundance. New nano-composite films based on Nitrogen doped Carbon nano-dots decorated Telluride nano-rods have been designed, showing significant improvements in their thermoelectric properties. The introduction of Nitrogen doped Carbon nano-dots led to enhanced electrical conductivity, decreased Seebeck coefficient, and increased power factor, resulting in improved thermoelectric performance of the composite films.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Materials Science, Ceramics
Hao Zhao, Baoyin Xu, Zhanhui Ding, Yanfeng Xue, Jing Yang, Wei Zhao, Yongfeng Li, Bin Yao, Hongdong Li, Yucheng Lan
Summary: By fabricating porous structures, the thermal conductivity of Bismuth telluride was reduced, leading to improved thermoelectric properties. The study showed that porous (Bi,Sb)2Te3 materials with increased porosity and pore size had significantly lower thermal conductivity. This method of preparing porous thermoelectric materials has potential for enhancing thermoelectric performances.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Yongyoon Cho, Naofumi Okamoto, Shunpei Yamamoto, Shu Obokata, Kotaro Nishioka, Hiroaki Benten, Masakazu Nakamura
Summary: A hybrid yarn made of carbon nanotubes and artificial biomolecules is developed for wearable thermoelectric modules. The use of ionic liquid and polymeric surfactant proves to be effective in dispersing the CNT/biomolecule composite, improving the thermoelectric performance and demonstrating the generality of the application. The incorporation of biomolecules significantly reduces the thermal conductivity of CNT yarns, making them advantageous for wearable devices.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Physics, Applied
Cham Kim, David Humberto Lopez
Summary: In this study, a bulk-structured composite was prepared by blending the abundant conducting polymer PEDOT:PSS with Bi2Te3. The composite exhibited improved power factor due to energy filtering effects at the interface and lower thermal conductivity due to phonon scattering effects. The electrical and thermal properties were decoupled, resulting in significantly enhanced figure of merits compared to pristine Bi2Te3.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Kang Lei, Haiming Huang, Xu Jia Liu, Weiliang Wang, Kai Guo, Ren Kui Zheng, Han Li
Summary: The eco-friendly thermoelectric material SnTe has attracted attention for its excellent thermo-electric properties. However, its thermoelectric properties are limited by high carrier concentration and thermal conductivity. In this study, rare-earth element Y is introduced to modulate its microstructure and thermal transport properties. Y doping enhances the power factor and the introduced Y/Y2Te3 multiscale composite nanostructures in the matrix greatly reduce the lattice thermal conductivity. The peak ZT value of Sn0.97Y0.03Te-5%Cu2Te is 1.27 at 823 K, showing a 217% enhancement compared to pristine SnTe.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Zhuyu Feng, Yuhong Huang, Shujing Lin, Hongkuang Yuan, Hong Chen
Summary: The thermoelectric transport properties of Janus monolayers M2P2S3Se3 (M = Zn and Cd) were studied using first-principles based transport theory. The Zn2P2S3Se3 and Cd2P2S3Se3 monolayers were found to be indirect-gap semiconductors. The lower lattice thermal conductivity (kappa(l)) of Zn2P2S3Se3 compared to Cd2P2S3Se3 was attributed to the softer Zn-Se/S bonds, which caused more pronounced flat modes in the phonon dispersion. The carrier transport in both monolayers was dominated by polar optical phonon scattering, resulting in a significant decrease in electrical conductivity and power factor. The predicted figure of merit (zT) increased with temperature and reached optimal values of 0.86 and 0.30 at 1200 K for n-type Zn2P2S3Se3 and Cd2P2S3Se3 monolayers, respectively, at specific electron densities.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Ze Xu, Yi-Xuan Liu, Maryam Azadeh, Hao-Cheng Thong, Yuqi Jiang, Fang-Zhou Yao, Zhen-Xing Yue, Zhong-Tai Zhang, Zi-Long Tang, Jing-Feng Li, Heng Wang, Till Froemling, Ke Wang
Summary: Recent advances in perovskite ferroelectrics have led to the development of exciting sensors and actuators. The control of defects is crucial for the performance of ferroelectric materials, especially lead-free ones. However, quantitatively studying defect concentration remains a challenge due to complex measurement techniques. This study demonstrates a feasible approach to analyzing defects and charges in alkali metal niobate, providing insights into their impact on conductivity and oxygen partial pressure, and suggesting strategies for performance optimization in perovskite oxides.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Ceramics
Ahmed Gadelmawla, Udo Eckstein, Kevin Riess, Yi-Xuan Liu, Ke Wang, Jing-Feng Li, Ken-ichi Kakimoto, Neamul H. Khansur, Kyle G. Webber
Summary: The influence of stress on the small-signal dielectric permittivity and piezoelectric coefficient of polycrystalline lead-free perovskite was studied under different constant uniaxial stress. The study revealed that the electromechanical response was suppressed and phase boundaries shifted under stress. The sensitivity to stress was found to increase with the BZ/BLT ratio in the system, and a significant increase in relative permittivity was observed under compressive stress at temperatures below -50 degrees C.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Jinfeng Dong, Yilin Jiang, Yandong Sun, Jue Liu, Jun Pei, Wei Li, Xian Yi Tan, Lei Hu, Ning Jia, Ben Xu, Qian Li, Jing-Feng Li, Qingyu Yan, Mercouri G. Kanatzidis
Summary: GeMnTe2 adopts a cubic rock salt structure and can be tuned by alloying with SbTe to achieve high power factor and low thermal conductivity. The GeMnTe2-15.1%SbTe composition exhibits a ZTave of 0.96 in the temperature range of 400-823 K.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Ceramics
Li Ma, Zhiyi Che, Chao Xu, Zhenyong Cen, Qin Feng, Xiyong Chen, Fujita Toyohisa, Jing-Feng Li, Shujun Zhang, Nengneng Luo
Summary: In this study, a strategy to reduce the consumption of silver and achieve good energy storage properties in silver niobate based ceramics was successfully demonstrated. By co-modifying with sodium and tantalum, a high recoverable energy storage density of 6.5 J/cm3 and a good energy storage efficiency of 78% were achieved in the 40Na-65Ta composition. This work promotes the commercialization potential of relaxor antiferroelectric ceramics for energy storage applications.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
Zhicheng Huang, Kei Hayashi, Wataru Saito, Jun Pei, Jing-Feng Li, Yuzuru Miyazaki
Summary: Li-doped Mg2Sn single crystals exhibit high carrier mobility and power factor, as well as low lattice thermal conductivity, leading to superior thermoelectric performance compared to other p-type Mg2Sn polycrystals and single crystals.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Ceramics
Qing Liu, Er Pan, Fucai Liu, Jing-Feng Li
Summary: There is growing research interest in lead-free potassium sodium niobate (KNN)-based ceramics, and improving their thermal stability of piezoelectricity can promote their applications. Additionally, rare-earth-ion doping can endow KNN-based ceramics with photoluminescence property, making them competitive in potential applications. In this study, a novel KNN-based ceramic material doped with Eu was designed to achieve enhanced temperature-stable piezoelectricity and good luminescence property.
JOURNAL OF ADVANCED CERAMICS
(2023)
Article
Multidisciplinary Sciences
Nengneng Luo, Li Ma, Gengguang Luo, Chao Xu, Lixiang Rao, Zhengu Chen, Zhenyong Cen, Qin Feng, Xiyong Chen, Fujita Toyohisa, Ye Zhu, Jiawang Hong, Jing-Feng Li, Shujun Zhang
Summary: The authors designed NaNbO3 based ceramics to achieve a reversible phase transformation between antiferroelectric and ferroelectric phases, resulting in a well-defined double hysteresis loop in the P-E hysteresis curve. NaNbO3 is a lead-free antiferroelectric material with potential applications in energy storage capacitors, solid-state cooling, and displacement transducers. A new strategy of reducing the oxygen octahedral tilting angle is proposed to stabilize the antiferroelectric phase of NaNbO3, and its effectiveness is confirmed through experimental characterization. The resulting ceramic exhibits highly reversible phase transitions and improved properties compared to pure NaNbO3.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Li-Feng Zhu, Shiqing Deng, Lei Zhao, Gen Li, Qi Wang, Linhai Li, Yongke Yan, He Qi, Bo-Ping Zhang, Jun Chen, Jing-Feng Li
Summary: This study proposes a strategy of heterovalent-doping-enabled atom-displacement fluctuation to enhance the breakdown strength and energy-storage density of AgNbO3-based multilayer capacitors. Experimental results demonstrate the realization of ultrahigh breakdown strength and energy-storage density in Sm0.05Ag0.85Nb0.7Ta0.3O3 multilayer capacitors, achieving a breakthrough in the energy storage performance of lead-free antiferroelectric capacitors.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Huijuan Zhao, Haihua Hu, Jing-Wei Li, Jing-Feng Li, Jing Zhu
Summary: Direct observation with atomic-scale resolution using spherical-aberration-corrected scanning transmission electron microscopy reveals a self-independent binary-sublattice construction in α-Cu2Se, with ordered copper fluctuation structures embedded in a rigid pseudo-cubic Se sublattice. The ordering of Cu results in considerable amounts of boundaries, leading to ultrastrong phonon scattering. Density functional theory calculations suggest that the electronic structures are mainly determined by the rigid Se sublattice and are not sensitive to various copper fluctuations. This study provides important information to understand the correlation between the specific structure and thermoelectric performance of α-Cu2Se, as well as for designing new thermoelectric materials.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Nagendra Singh Chauhan, Ichiro Ono, Yuzuru Miyazaki
Summary: This study demonstrates the effectiveness of V and Fe co-substitutions in realizing charge compensation and lattice anharmonicity in p-type higher manganese silicide (HMS) single crystals, leading to higher thermoelectric performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Qiang Zhang, Jiadang Li, Nagendra S. Chauhan, Lifei Wang, Zhicheng Huang, Wenhao Fan, Kei Hayashi, Shaoping Chen, Jianfeng Fan, Yuzuru Miyazaki
Summary: In this study, graphene was added to Mg3.24Sb1.5Bi0.49Te0.01 materials to modify the highly resistive space-charge region at grain boundaries, leading to a significant improvement in carrier mobility and ZT value. The introduction of graphene effectively reduced the carrier transport energy barrier and increased the drift mobility. First-principles calculations revealed a negative correlation between the electronic density of states and the grain boundary potential barrier. Additionally, the incorporation of graphene also contributed to a moderate reduction in lattice thermal conductivity through nano-particle phonon scattering.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Inorganic & Nuclear
Qing Liu, Er Pan, Hao Deng, Fucai Liu, Jing-Feng Li
Summary: A novel Dy3+ doped KNN-based lead-free multifunctional fluorescent ferroelectric ceramics were investigated in this study. The ceramics showed good and thermally stable piezoelectricity, as well as efficient luminescence. With these properties, the Dy3+ modified KNN-based ceramics hold great promise for optoelectronic multifunctional devices.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Review
Chemistry, Physical
Nagendra S. Chauhan, Yuzuru Miyazaki
Summary: Nowotny chimney ladder (NCL) phases are intermetallic binary compounds with unique lattice dynamics and structural modification abilities. Higher manganese silicides (MnSiγ) are extensively studied as an example of NCL phase, exploring the structural interpretation and strategies for improving thermoelectric transport properties. Chemical modification offers potential for further optimizing the dimensionless thermoelectric figure of merit (zT).
CHEMICAL PHYSICS REVIEWS
(2023)
Article
Chemistry, Physical
Jing Wang, Xuhui Fan, Zhen Liu, Kongjun Zhu, Hao Yuan, Zehan Zheng, Lei Zhao, Ji Zhang, Qibin Yuan, Jing-Feng Li
Summary: This study achieves high recoverable energy storage density and energy efficiency in lead-free AgNbO3-based ceramics through phase engineering and Bi-doping, making them promising for applications in advanced high-power electric and electronic devices.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)