Editorial Material
Chemistry, Physical
Dan Zhao
Summary: In their recent study, Ma et al. conducted a comprehensive evaluation of ionic thermoelectric materials by examining the field evolutions of temperature, voltage, and ionic concentration. This research provides important insights for researchers to understand the performance of these materials.
Article
Thermodynamics
Hailong He, Yabo Zhao, Hongrui Ren, Chunping Niu, Zhenxuan Fang, Yi Wu, Mingzhe Rong
Summary: This paper introduces a modified quasi-steady-state method based on stepped temperature rise for high implementation efficiency, validated through simulations and tests for accuracy. The modified method significantly improves efficiency while maintaining accuracy, aiding in TEG performance estimation and guiding the design of large-scale power systems.
APPLIED THERMAL ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Kien Trung Nguyen, Giang Bui-Thanh, Hong Thi Pham, Thuat Nguyen-Tran, Chi Hieu Hoang, Hung Quoc Nguyen
Summary: At the ultra-thin limit below 20 nm, a film's physical properties depend heavily on its thickness. In order to eliminate uncertainties in later characterizations, an in-situ apparatus that measures thermoelectricity during film deposition was designed and built. The system was calibrated carefully before being used to measure the Seebeck voltage on a Hall bar structure of a film deposited through a shadow mask. Thoroughly tested on various materials, this reliable and precise in-situ measurement system can help study physics during film growth or expedite the search for better thermoelectric materials.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2023)
Article
Thermodynamics
Yuanyuan Tian, Anbang Liu, Junli Wang, Yajie Zhou, Chengpeng Bao, Huaqing Xie, Zihua Wu, Yuanyuan Wang
Summary: The study investigates the impact of phase change temperature of phase change material (PCM) on the output power and generated electricity of PCM-TEG system. Results show that optimizing the phase change temperature of PCM can enhance the total generated electricity by as much as 15.6% through matching PCM with thermoelectric properties of the thermoelement. Furthermore, a relationship between the optimal phase change temperature of PCM and the temperature for maximum figure of merit (ZT) of the thermoelement is established, providing a selection criterion for PCM in TEG modules.
Article
Engineering, Multidisciplinary
Pawel Ziolkowski, Frank Edler, Christian Stiewe, Sebastian Haupt, Kai Huang, Byungki Ryu, SuDong Park, Titas Dasgupta, Prashant Sahu, Rebekka Taubmann, Eckhard Mueller
Summary: Precise characterization of thermoelectric materials is crucial for valid scientific results, with a specific focus on determining the Seebeck coefficient, electric conductivity, and thermal conductivity. The thermoelectric figure of merit zT is used to assess the conversion efficiency of thermoelectric materials. The qualification of beta-Fe0.95Co0.05Si2 (FeSi2) as a high temperature reference material for the thermoelectric power factor (PF = S2 Sigma) is reported, highlighting its functional homogeneity and stability. This certification measurement demonstrates the suitability of FeSi2 as a future reference material for thermoelectric metrology at elevated temperatures.
Article
Materials Science, Multidisciplinary
Dan Zhang, Ruiqi Zhong, Shikang Gao, Lei Yang, Fang Xu, Ping He, Guannan Liu, Xingyuan San, Junyou Yang, Yubo Luo, Shufang Wang
Summary: An effective strategy for weakening electron-phonon coupling was proposed and demonstrated to enhance thermoelectric properties in Cu3SbSe4-MTe (M = Ge/Sn) solid solution systems. GeTe-alloyed samples showed higher mobility and larger power factor compared to SnTe-alloyed system, attributed to increased bond covalency. Density function theory calculations supported the improvement in electrical transport due to the weakening of electron-phonon coupling through increased bond covalency. A high thermoelectric figure of merit (ZT) of around 0.80 at 648 K and an average ZT of 0.41 over 300-648 K were achieved in 1% GeTe-alloyed Cu3SbSe4. This study provides a new route for enhancing mobility in thermoelectric materials through increased bond covalency.
SCIENCE CHINA-MATERIALS
(2023)
Article
Construction & Building Technology
Saad Raefat, Mohammed Garoum, Najma Laaroussi, Yassine Chihab
Summary: A flash apparatus for thermal diffusivity measurement of building materials was developed and tested in this study, which was then used to estimate the thermal diffusivity of local materials based on clay and straw. A mathematical model was used to process the measured data and estimate the unknown parameters, demonstrating a decrease in thermal diffusivity, thermal conductivity, and heat capacity with an increase in straw mass fraction. The precision and accuracy of the apparatus results were confirmed through measurements on various homogeneous building materials.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2021)
Article
Construction & Building Technology
Mehran Motevalli, Daniel Balzani
Summary: This article investigates a recently proposed orthotropic nonlinear material model for woven fabrics, which is applied to glass-PTFE and PES-PVC fabrics. The model contains three governing stiffness-related material properties that are uniquely identified using a new optimization procedure based on the separation of model and material parameters. The optimized model parameters are then used to identify the associated stiffness-related material parameters, resulting in an efficient method for independent identification of model and material parameters.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Chemistry, Physical
Gyoung S. Na
Summary: To solve the engineering problem in material synthesis, researchers propose a multimodal graph-to-sequence model that predicts necessary synthesis operations and their conditions for efficient synthesis of thermoelectric materials. Experimental evaluation shows that this method achieves high accuracy in predicting material synthesis processes, and successfully generates material synthesis recipes using large language models.
CHEMISTRY OF MATERIALS
(2023)
Article
Thermodynamics
Mengfan Duan, Hongli Sun, Borong Lin, Yifan Wu
Summary: This study proposed a sensitivity analysis method to guide the optimization of thermoelectric materials and evaluate the enhancement potential of energy performance in thermoelectric air cooling systems. Results showed that the cooling coefficient of performance was more sensitive to the Seebeck coefficient, and could increase by over 150% when the figure of merit value reached 3.
Article
Nanoscience & Nanotechnology
Zeming He, Ming Yang, Ziman Wang, Hao Chen, Xingli Zhang, Qinglong Jiang, Vignesh Murugadoss, Mina Huang, Zhanhu Guo, Hang Zhang
Summary: This study investigated the performance of the high-temperature thermoelectric material La2Te3 and optimized its structure, providing a reference for the design and fabrication of high-efficiency segmented thermoelectric devices.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Chemistry, Physical
Bingke Li, Yongsheng Yang, Hangbo Qi, Zhehao Sun, Fan Yang, Kexin Huang, Zhaoyang Chen, Bing He, Xiuchan Xiao, Chen Shen, Ning Wang
Summary: In recent years, there has been great interest in FeOCI-type monolayers as promising thermoelectric materials. This study reports the excellent thermoelectric properties and strong anisotropy of the two-dimensional (2D) material Sc2I2S2 based on first-principles calculations. At 700 K, 2D Sc2I2S2 exhibits anisotropic lattice thermal conductivities of 2.41 (x-direction) and 3.33 (y-direction) W/mK. Additionally, high and anisotropic n-type PF values of 20.9 (x-direction) and 0.65 (y-direction) mW m(-1) K-2 were also found in 2D Sc2I2S2. The ZT value of 2.54 in the x-direction, obtained through n-type doping, is 7 times higher than that in the y-direction (0.35). The significant difference in PF and kappa(1) reveals the origin of its anisotropy. These results suggest that the FeOCl-type monolayer Sc2I2S2 has excellent thermoelectric performance and exhibits strong anisotropy.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Thermodynamics
Limei Shen, Yupeng Wang, Xiao Tong, Shenming Xu, Yongjun Sun
Summary: Improving the efficiency of thermoelectric generators for low-grade heat recovery requires focusing on reducing lattice thermal conductivity rather than increasing the power factor, according to a recent study. Additionally, optimizing the Seebeck coefficient is more important than increasing electrical conductivity for power factor improvements of TE materials.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Instruments & Instrumentation
H. Naithani, P. Ziolkowski, T. Dasgupta
Summary: To address the issues in measuring the properties of thermoelectric materials, researchers have designed and assembled an apparatus that can accurately measure the Seebeck coefficient, electrical conductivity, thermal conductivity, power output, and efficiency of a single thermoelectric material sample under large temperature gradients. By reducing the contact resistance between the sample and the electrodes, the designed setup provides reliable measurements of various properties.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Engineering, Electrical & Electronic
Qingsong Zhang, Qingbin Zhai, Jianming Ding, Wentao Zhao, Xia He, Weiwei Liu
Summary: This article presents an efficient measurement method using 2-D laser displacement sensors to achieve the dynamic and noncontact measurement of wheelset geometric parameters. It establishes a mathematical model of the measurement system and designs a standard calibration mechanism to calibrate different sensors. The tread profile mapping method is investigated to determine the feasible scanning range, and the error caused by laser dislocation is analyzed. Static experiments and dynamic field tests demonstrate the high accuracy and real-time measurement capability of the system.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
