Energy Materials for Sustainable Development: Capacitative, Chemical and Thermal Storage and Conversion
Sponsored by: ACerS Energy Materials and Systems Division
Program Organizers: Armin Feldhoff, Leibniz University Hannover; Kyle Brinkman, Clemson University; Krista Carlson, University of Nevada, Reno; Eva Hemmer, University of Ottawa; Nikola Kanas, Institute Biosense, University of Novi Sad; Kjell Wiik, Norwegian University of Science and Technology; Lei Zuo, Virginia Tech; Stephanie Lee, Stevens Institute of Technology; Muhammad Hajj, Stevens Institute of Technology; Mohammad Haik, Stevens Institute of Technology
Wednesday 2:00 PM
October 20, 2021
Room: A216
Location: Greater Columbus Convention Center
Session Chair: Kevin Huang, University of South Carolina; Kyle Brinkman, Clemson University
2:00 PM Invited
Thermomagnetic Transport in 2D Layered Materials: Mona Zebarjadi1; Md. Sabbir Akhanda1; Emad Rezaei1; 1University of Virginia
Thermomagnetic materials use the Nernst coefficient to convert thermal energy into electricity. 2D layered semimetallic materials are advantageous for this purpose due to their large carrier mobility, small cross-plane thermal conductivity, bipolar conduction, and large transport anisotropy. In this talk, I will discuss our recent Nernst measurements in 2D layered semimetals, namely, Bi2Te3, NbSe2, and MoxW1-xTe2 single crystals and thin-films. I will also discuss our progress in the theoretical understanding of the Nernst signal from first-principles calculations. In general, we observed that samples with larger mobilities also own a larger Nernst coefficient. The Nernst signal shows nonlinear behavior at moderate magnetic field and increases at lower temperatures where the Seebeck coefficient tends to be very small.
2:30 PM Invited
Synthesis of New Antimonides for Thermoelectric Applications: Julia Zaikina1; 1Iowa State University
The discovery of new crystalline materials is of utmost importance in solid state and materials chemistry. However, synthesizing new compounds is often a serendipitous process requiring tedious optimization of synthesis conditions. Materials discovery can be accelerated by the development of synthesis and theoretical methods and in-situ characterization techniques allowing for the rapid “screening” of multicomponent systems. However, the sluggish kinetics of solid-state reactions entails the necessity of high temperatures and extended annealing, often leading to the stabilization of the thermodynamically stable products. Thus, new synthetic methods using unconventional reactive precursors must be developed to overcome traditional solid-state synthesis limitations. We have performed phase screening using reactive hydride precursors and discovered 8 new compounds in the Na-Zn-Sb and K-Zn-Sb ternary systems. These antimonides have a potential application as thermoelectric materials, e.g., materials converting heat into electricity and vise versa. Crystal chemistry and the physical properties of novel compounds will be discussed.
2:50 PM
Enhancement of Thermoelectric Properties of Bismuth Sulfide by Halide Substitution: Farheen Anjum1; 1IIT Kanpur
Over the past few decades, semiconducting chalcogenides sulphides-based (Bi2S3, Cu2-xS, CdS, TiS2, Ag2S etc.) compounds received lot of attentions for thermoelectric applications and have the advantage of having low cost, low toxic, more abundant elements. Various strategies such as doping have been used for improving its TE performance. Here, we report the synthesis and thermoelectric properties of Bi2S3 doped with CdCl2 synthesized by spark plasma sintering. XRD of all the samples show single phase formation. All the compositions exhibit a negative Seebeck coefficient suggesting n-type behavior. The increasing dopant concentration leads to the improvement in its electrical property. As a result, higher power factor ~700μW/m-K2 has been achieved in these composites. Further electron transport and heat transport mechanisms have been evaluated in co-relation with FESEM, XPS and TEM.Key Words: Chalcogenides, Thermoelectric, Energy Storage, Spark Plasma Sintering