Article
Engineering, Environmental
Min Chen, Jianjun Zhao, Yaru Wang, Xubo Huang, Yiming Xu
Summary: The study demonstrated a significant enhancement in photocatalytic activity of monoclinic BiVO4 by surface deposition of CuCoOx, with CuCoOx/BiV showing a much higher rate of phenol oxidation compared to other co-catalyst combinations. Photoluminescence and electrochemical studies revealed the different roles played by various co-catalysts in improving charge separation and promoting reactions like O-2 reduction and water oxidation on BiV.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Analytical
A. L. Yan, W. D. Wang, B. Q. Wang, X. C. Wang, J. P. Cheng
Summary: In this study, a new electrode material was designed and fabricated by depositing core-shell structured Co3O4@NiCo2O4 nanowire hybrid films on nickel foam. The hybrid film exhibited higher specific capacitance and smaller resistance, indicating great potential for energy storage.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Jamal-Deen Musah, A. M. Ilyas, Andrei Novitskii, Illia Serhiienko, Kingsley O. Egbo, Gopalan Saianand, Vladimir Khovaylo, Samuel Kwofie, Kin Man Yu, Vellaisamy A. L. Roy
Summary: This study demonstrates that substitution of erbium within bismuth selenide can enhance both the Seebeck coefficient and electrical conductivity, while reducing thermal conductivity. The optimal composition of Bi1.85Er0.15Se3 shows that minimal substitution is required for optimizing thermoelectric performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Review
Biochemistry & Molecular Biology
Yucen Liu, Jun Zhi, Wannuo Li, Qian Yang, Long Zhang, Yuqiao Zhang
Summary: Thermoelectric technology is a significant research area for utilizing waste heat and improving the efficiency of renewable energy technologies. Heavy-metal-based thermoelectric materials have been proposed, but face challenges due to their low stability, toxicity, and limited abundance. In contrast, oxide-based thermoelectric materials have attracted interest for overcoming these limitations. This review summarizes recent research progress and improvement strategies in oxide-based thermoelectric materials, providing an overview of their development history and design schemes to enhance overall performance.
Article
Nanoscience & Nanotechnology
Sophie Bresch, Patrick Stargardt, Ralf Moos, Bjoern Mieller
Summary: Thermoelectric generators are attractive devices for waste heat energy harvesting, but current commercial generators have limitations in power density and operation temperatures. This study focuses on high-temperature materials and innovative designs, providing a theoretical framework for appropriate generator design selection based on material properties. Prototype multilayer generators from the best thermoelectric oxide Ca3Co4O9 are manufactured using ceramic multilayer technology, exhibiting a power density of 2.2 mW cm-2 at a temperature difference of 260 K. Further design improvements increase the power density by a factor of 22, showing the potential of multilayer technology for thermoelectric energy harvesting.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Enamul Haque
Summary: Thermoelectric materials can generate electricity from heat, with NaBaBi predicted to have superior transport properties, electrical conductivity, and thermopower compared to Bi2Te3 and LiBaSb. NaBaBi is expected to have a higher ZT value at 300K than Bi2Te3.
SUSTAINABLE ENERGY & FUELS
(2021)
Article
Chemistry, Physical
Winda Devina, Anith Dzhanxinah Mohd Sarofil, Christian Chandra, Hyeon Seo Park, Jae -Ho Park, Kyung Yoon Chung, Wonyoung Chang, Jaehoon Kim
Summary: This paper introduces a new bimetallic material, cobalt-bismuth oxide (CBO) nanoneedles, which exhibit a stepwise Li+ ion uptake process that effectively suppresses volume expansion. The CBO electrode shows high reversible discharge capacity and stable cycling performance, making it an attractive long-life anode material for lithium-ion batteries.
APPLIED SURFACE SCIENCE
(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
Metallurgy & Metallurgical Engineering
Hadi Abdollahi, Roozbeh Saneie, Sied Ziaedin Shafaei, Mirsaleh Mirmohammadi, Amirhossein Mohammadzadeh, Olli H. Tuovinen
Summary: This study investigated the bioleaching of cobaltite-bearing magnetite-rich ore using mesophilic and moderately thermophilic cultures at different pulp densities. The results showed that mesophiles were more effective than moderate thermophiles in bioleaching cobaltite. Additional Fe3+ in the leach solution increased cobalt dissolution. Kinetic modeling indicated that the controlling step of bioleaching with moderate thermophiles was the chemical reaction.
Article
Materials Science, Ceramics
Xiaowei Liu, Fangjun Jin, Ning Sun, Jiangxin Li, Yu Shen, Fang Wang, Jinhua Li
Summary: The study prepared NBC95+B composite cathode materials by introducing Nd defect with bismuth oxide, which effectively increased conductivity and reduced thermal expansion coefficient, showing good electrochemical performance.
CERAMICS INTERNATIONAL
(2021)
Article
Green & Sustainable Science & Technology
Wei Zhao, Zhiyao Duan, Zheng Zheng, Bo Li
Summary: Peroxymonosulfate-based advanced oxidation process (PMS-AOPs) is an effective approach for eliminating emerging organic pollutants (EOPs). This study developed a new PMS activator, cobalt bismuth oxide (Bi7.53Co0.47O11.92), which achieved 100% degradation efficiency and 82.1% mineralization rate of diclofenac (DCF) within 10 minutes. The degraded products showed lower toxicity than pristine DCF, and the activator exhibited good reusability. This work contributes to the development of stable and high-efficiency PMS-AOPs for EOPs treatment.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Multidisciplinary Sciences
Byungki Ryu, Jaywan Chung, SuDong Park
Summary: The traditional theory of thermoelectric materials based on a single parameter zT is inaccurate. The thermoelectric conversion efficiency is actually determined by three independent parameters: Z(gen), tau, and beta. Increasing any of these three degrees of freedom can lead to higher efficiency, suggesting a new direction in material discovery and device design beyond zT.
Article
Chemistry, Physical
Siqi Xiang, Yihan Liang, Mengcheng Zhou, Xinfang Zhang
Summary: Thermoelectric materials based on Cu1.8S face challenges in high-temperature applications due to oxidation and spontaneous decomposition. However, partially replacing S atoms with Se can significantly enhance the anti-oxidation and anti-decomposition capacities of Cu1.8S materials, while improving their thermoelectric performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Applied
M. Parzer, F. Garmroudi, A. Riss, S. Khmelevskyi, T. Mori, E. Bauer
Summary: This paper explores the aluminum-rich region in the Fe-V-Al material system and proposes a promising approach to improve the thermoelectric properties of p-type Heusler alloys. Experimental results show that Fe2VAlx alloys with high Al solubility exhibit significantly increased thermopower and reduced thermal conductivity. The analysis suggests that the enhancement is likely attributed to the formation of a resonant state at the valence band edge, which is supported by density-functional-theory calculations. This work paves the way for the development of p-type full-Heusler materials with enhanced thermoelectric performance.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Shiyang He, Amin Bahrami, Xiang Zhang, Ignacio Gonzalez Martinez, Sebastian Lehmann, Kornelius Nielsch
Summary: This study introduces a strategy of interface modification based on powder atomic layer deposition to control and modify the phase boundary of pure bismuth, resulting in a substantial increase in thermoelectric performance and a significant decrease in thermal conductivity, with a maximum figure of merit of 0.15. This method shows great potential for practical application in developing high-performance thermoelectric materials.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Materials Science, Ceramics
Lucia Fernandez Garcia, Feridoon Azough, Gareth Parsons, Amanda Quadling, Bing Wang, Robert Freer
Summary: The study found that SiC varistor performance is significantly influenced by SiC grain size, composition, and graphite content. Higher graphite content leads to lower non-linear coefficient and breakdown field. Decreasing SiC grain size results in increased non-linear coefficient and breakdown field strength.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Energy & Fuels
Robert Freer, Dursun Ekren, Tanmoy Ghosh, Kanishka Biswas, Pengfei Qiu, Shun Wan, Lidong Chen, Shen Han, Chenguang Fu, Tiejun Zhu, A. K. M. Ashiquzzaman Shawon, Alexandra Zevalkink, Kazuki Imasato, G. Jeffrey Snyder, Melis Ozen, Kivanc Saglik, Umut Aydemir, Raul Cardoso-Gil, E. Svanidze, Ryoji Funahashi, Anthony V. Powell, Shriparna Mukherjee, Sahil Tippireddy, Paz Vaqueiro, Franck Gascoin, Theodora Kyratsi, Philipp Sauerschnig, Takao Mori
Summary: This paper presents tables of key thermoelectric properties for a wide range of inorganic materials. These tables provide a reference for comparing the performance of different materials.
JOURNAL OF PHYSICS-ENERGY
(2022)
Review
Energy & Fuels
Jincheng Yu, Robert Freer
Summary: Calcium cobaltite is a promising thermoelectric oxide material with a unique structure and grain structure that offer opportunities to enhance its thermoelectric performance. Three strategies, including elemental doping, optimization of fabrication route, and composite design, are effective ways to improve the thermoelectric properties of calcium cobaltite. The roles of dopants, processing routes, and phase composition are identified to provide insights into generating calcium cobaltite-based materials with desired properties.
JOURNAL OF PHYSICS-ENERGY
(2022)
Article
Engineering, Electrical & Electronic
Jia Guo, Jie Xu, Runwu Yang, Kan Chen, Haixue Yan, Feng Gao
Summary: This study investigates the effects of composition on the thermal conductivity, dielectric, and wave-transparent properties of Y-alpha-SiAlON ceramics. The experimental results show that these ceramics exhibit excellent thermal insulation and wave-transparent properties, making them promising high-temperature window materials.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Nanoscience & Nanotechnology
Xiaodong Liu, Demie Kepaptsoglou, Ewa Jakubczyk, Jincheng Yu, Andrew Thomas, Bing Wang, Feridoon Azough, Zhaohe Gao, Xiangli Zhong, Robert Dorey, Quentin M. Ramasse, Robert Freer
Summary: High-performance Nb-doped TiO2 thick films with enhanced thermoelectric performance are fabricated using facile and scalable screen-printing techniques. The films exhibit different defect structures, including crystallographic shear (CS) structures, twin boundaries, and Al-segregated CS structures, which contain abundant oxygen vacancies and enable energy-filtering effects. These CS structures contribute to the simultaneous enhancement of electrical conductivity and Seebeck coefficients, resulting in the highest power factor observed in TiO2-based TE films at elevated temperatures. The microstructure modification strategy provides a novel route for atomic-level defect engineering.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Ceramics
Xiaodong Liu, Jincheng Yu, Bing Wang, Krishnendu Maji, Diana T. Alvarez-Ruiz, Emmanuel Guilmeau, Robert Freer
Summary: Significantly improved thermoelectric performance of Nb-doped TiO2 ceramics was achieved by forming beta-Sn grain boundary inclusions in situ. The ceramics were prepared through a mixed oxide route and sintered at a lower temperature of 1473 K under strongly reducing conditions. The introduction of beta-Sn inclusions at grain boundaries greatly assisted densification and enhanced carrier concentration and electrical conductivity, resulting in a 27% increase in power factor and improved ZT values of 0.20 at 873 K. This grain boundary engineering approach offers a simple and eco-friendly method to enhance the thermoelectric performance of low-cost oxide-based ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Zhiquan Dai, Lulu Cong, Fei Zuo, Mattia Biesuz, Kan Chen, Mauro Bertolotti, Milad Kermani, Lin Yong, Vaclav Tyrpekl, Chunfeng Hu, Filippo Boi, Hua-Tay Lin, Michael Reece, Salvatore Grasso
Summary: Graphite, a material with unique properties, can be consolidated at room temperature using mild pressure. The resulting compact exhibits high electrical and thermal conductivities. Its recyclability is enabled by the reversible nature of van der Walls bonding.
APPLIED MATERIALS TODAY
(2022)
Correction
Nanoscience & Nanotechnology
Yibing Zhu, Feridoon Azough, Xiaodong Liu, Xiangli Zhong, Minghao Zhao, Kalliope Margaronis, Sohini Kar-Narayan, Ian Kinloch, David J. Lewis, Robert Freer
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Jun Pei, Jian-Lei Shi, Hezhang Li, Yilin Jiang, Jinfeng Dong, Hua-Lu Zhuang, Bowen Cai, Bin Su, Jincheng Yu, Wei Zhou, Bo-Ping Zhang, Jing-Feng Li
Summary: In this study, segmented one-leg thermoelectric (TE) modules of GeTe and (Bi,Sb)(2)Te-3 were designed and fabricated using one-step spark plasma sintering (SPS) to achieve higher performance over the whole temperature range. The diffusion behavior of different metal layers in GeTe was systematically studied to find suitable contact and connect layers. Finite element simulation method was used to determine the geometric structure and the ratio of GeTe to (Bi,Sb)(2)Te-3 in the segmented TE module. The fabricated module showed a relatively high conversion efficiency but lower than theoretical predictions, indicating the effectiveness of developing segmented TE modules to enhance TE performance.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Yu Liu, Paul D. McNaughter, Feridoon Azough, Xiaodong Liu, Jonathan M. Skelton, Andrey Kretinin, Robert Freer, David J. Lewis
Summary: Through aerosol-assisted chemical vapor deposition, polycrystalline orthorhombic SnS thin films were prepared using a single source precursor. The deposition temperature has a dominant effect on charge transport. The maximum power factor and the relatively low thermal conductivity of the SnS films were obtained at certain deposition temperature, making them promising candidates for thermoelectric applications. The study also provided an improved understanding of the materials performance through investigating the electronic structure and electrical transport properties.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Yu Liu, Andrey V. Kretinin, Xiaodong Liu, Weichen Xiao, David J. Lewis, Robert Freer
Summary: Cu12Sb4S13 thin films were deposited on various substrates via aerosol-assisted chemical vapor deposition (AACVD), and the addition of a Sb2O3 buffer layer improved the quality and electrical transport properties of the deposited thin film. The films grown on different substrates showed different microstructures and electrical transport properties, with the film deposited on a SiO2-coated Si wafer exhibiting the best performance.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Chongyang Zeng, Pietro Stenier, Kan Chen, Kening Wan, Ming Dong, Suwei Li, Coskun Kocabas, Michael J. Reece, Dimitrios G. Papageorgiou, Alexey N. Volkov, Han Zhang, Emiliano Bilotti
Summary: Carbon nanotubes (CNTs) have excellent properties such as electrical conductivity, Seebeck coefficient, mechanical strength, and environmental stability, making them highly desirable for thermoelectric applications. However, their high thermal conductivity poses a challenge. This study presents a novel method to reduce the thermal conductivity of CNT veils by introducing defects while preserving their other properties.
MATERIALS HORIZONS
(2023)
Article
Nanoscience & Nanotechnology
Yibing Zhu, Feridoon Azough, Xiaodong Liu, Xiangli Zhong, Minghao Zhao, Kalliope Margaronis, Sohini Kar-Narayan, Ian Kinloch, David J. Lewis, Robert Freer
Summary: We present a novel method to enhance the thermoelectric performance of ceramics. By using ammonium tetrathiomolybdate as a precursor, the electrical conductivity of the ceramics is significantly increased without impacting the Seebeck coefficients. This method provides a simple way to achieve high charge mobility in polycrystalline titanate materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Sahil Tippireddy, Feridoon Azough, Animesh Bhui, Iuliia Mikulska, Robert Freer, Kanishka Biswas, Paz Vaqueiro, Anthony V. Powell
Summary: CuFeS2 is a promising n-type thermoelectric candidate for low-grade waste heat recovery. In this study, chromium-containing CuFeS2 materials were synthesized, resulting in the formation of a composite with Cr-rich precipitates embedded in the CuFeS2 matrix. By reducing a portion of Fe(3+) ions to Fe2+, the Cu:Fe ratio of the CuFeS2 phase was altered, indirectly affecting the electrical properties. Additionally, the presence of nano-sized precipitates and dislocations significantly reduced the lattice thermal conductivity, resulting in an enhanced thermoelectric figure-of-merit.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Sahil Tippireddy, Feridoon Azough, Vikram, Animesh Bhui, Philip Chater, Demie Kepaptsoglou, Quentin Ramasse, Robert Freer, Ricardo Grau-Crespo, Kanishka Biswas, Paz Vaqueiro, Anthony Powell
Summary: Partial substitution of germanium in chalcopyrite leads to an enhancement of thermoelectric properties due to local structural distortion, lattice softening, and the appearance of resonant phonon modes. The weak chemical bonding of germanium with sulphur also contributes to a high Seebeck coefficient and an improvement in the power factor.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)