材料科学
热电效应
兴奋剂
热导率
热电材料
纳米复合材料
凝聚态物理
声子
电阻率和电导率
纳米技术
光电子学
复合材料
热力学
电气工程
物理
工程类
作者
Dandan Qin,Wenjing Shi,Yunzhuo Lu,Wei Cai,Jiehe Sui
标识
DOI:10.1021/acsami.2c07044
摘要
Nanocomposites have become a widely popular way to assist in the enhancement of thermoelectric performance for filled skutterudites. Herein, we unveil the distinctive effect of Si doping on the classic Yb0.3Co4Sb12. On the one hand, the reduced Yb filling fraction is accompanied by the in-situ precipitated CoSi nanoparticles, which not only enhances the power factor in the intermediate-low temperature range but also reduces electronic thermal conductivity for decreasing the carrier concentration. On the other hand, CoSi nanoparticles intensively disrupt the phonon transport, hiding the increased lattice thermal conductivity due to reduced Yb filling fraction. Although the residual YbSb2 second phases have an adverse effect on the thermoelectric properties, the integration effects achieve a peak ZT value of 1.37 at 823 K and increase ZTave by 21% for the Yb0.3Co4Sb12/0.1Si sample.
科研通智能强力驱动
Strongly Powered by AbleSci AI