High performance p-type segmented leg of misfit-layered cobaltite and half-Heusler alloy

作者：Hung Le Thanh^*; Ngo Van Nong; Snyder G Jeffrey; Man Hoang Viet; Balke Benjamin; Han Li; Stamate Eugen; Linderoth Soren; Pryds Nini

来源：Energy Conversion and Management, 2015, 99: 20-27.

DOI：10.1016/j.enconman.2015.03.112

• Segmented thermoelectrics
• Segmented oxide-metal alloy
• Thermoelectric efficiency
• Power generation efficiency

In this study, a segmented p-type leg of doped misfit-layered cobaltite Ca2.8Lu0.15Ag0.05Co4O9+delta and half-Heusler Ti0.3Zr0.35Hf0.35CoSb0.8Sn0.2 alloy was fabricated and characterized. The thermoelectric properties of single components, segmented leg, and the electrical contact resistance of the joint part were measured as a function of temperature. The output power generation characteristics of segmented legs were characterized in air under various temperature gradients, Delta T, with the hot side temperature up to 1153 K. At Delta T approximate to 756 K, the maximum conversion efficiency reached a value of similar to 5%, which is about 65% of that expected from the materials without parasitic losses. The long-term stability investigation for two weeks at the hot and cold side temperatures of 1153/397 K shows that the segmented leg has good durability as a result of stable and low electrical resistance contacts.

• 出版日期2015-7-15