Facile composite engineering to boost thermoelectric power conversion in ZnSb device
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS(2023)
摘要
Zinc antimonide (ZnSb) is one of the alternatives for commercial thermoelectric materials due to its non-toxic, low-cost, and earth-abundant nature. However, its simple crystal structure causes strong phonon vibrations, which enhance lattice thermal conductivity. In this work, we systematically studied the effect of gamma-Al2O3 nano-inclusions on ZnSb. Our results show that composite engineering imparts lattice phonon scattering for reduced thermal conductivity and low-energy carrier filtering for enhanced Seebeck coefficient. The obtained figure of merit in the ZnSb+5% gamma-Al2O3 sample at 673 K is nearly two-fold higher than the pristine sample. Our fabricated 2-leg ZnSb+5% gamma-Al2O3 device displayed a power generation of 0.11 mu W at Delta T of 200 degrees C. Furthermore, adding gamma-Al2O3 nano-inclusions improve the mechanical and thermal stabilities due to grain boundary hardening and dispersion strengthening. Overall, the addition of gamma-Al2O3 nano-inclusions to ZnSb enhancing the Seebeck co-efficient, reducing thethermal conductivity, and improving mechanical and thermal stability significantly.
更多查看译文
关键词
thermoelectric power conversion,facile composite engineering,power conversion
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要