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Anomalous high ZT above 2.2 in light element dominated compound Li 4OTe due to low thermal conductivity by Shi-ming Liu; Hong-xia Zhong; Yao-hui Zhu; Wen-hui Guo; Yong He; Chong Tian; Xinqiang Wang; Jun-jie Shi is a Engineering article available to read on EtoBox.
What is Anomalous high ZT above 2.2 in light element dominated compound Li 4OTe due to low thermal conductivity about?
Thermoelectric materials usually contain heavy metal elements to ensure low lattice thermal conductivity κ l . However, such elements like Pb, Bi and Sb have the expenses of high prices and potential risks of pollution. Herein, we propose a novel design strategy for thermoelectrics by constructing new light element dominated materials, such as quasi-antifluorite Li 4 OTe, with a high figure of merit surpassing 2.2. The introduction of O atom in Li 4 OTe crystal causes optical phonon softening and large phase space for three-phonon scattering processes, leading to much lower κ l ( < 1 W m−1 K−1) than antifluorite Li 2 X (X=O, Te). This picture can be extended to other quasi-antifluorites, which will stimulate intense interests in the exploration of the light element dominated compounds, as new environmentally friendly and low-cost thermoelectric materials.
Who reads Anomalous high ZT above 2.2 in light element dominated compound Li 4OTe due to low thermal conductivity?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Shi-ming Liu; Hong-xia Zhong; Yao-hui Zhu; Wen-hui Guo; Yong He; Chong Tian; Xinqiang Wang; Jun-jie Shi
- Publisher
- Elsevier BV
- Published
- 2023
- Language
- EN
- Field
- Engineering (Physical Sciences)