Scientists in China and the US have demonstrated a thermoelectric material with excellent thermal and chemical stability up to high temperatures; it’s a promising material for converting wasted heat into electricity, they say.
The material is an oxyselenide – BiCuSeO. A high ZT ~1.1 at 923K in BiCuSeO system is achieved via Ba heavily doping and refining grain sizes (200~400 nm), which is higher than any thermoelectric oxides. Excellent thermal and chemical stability up to 923 K and high thermoelectric performance confirm that BiCuSeO system is promising for thermoelectric power generation applications.
Read the ‘HOT’ EES Communication:
High thermoelectric figure of merit ZT>1 in Ba heavily doped BiCuSeO oxyselenides
Li-Dong Zhao, Jing Li, Jiehe Sui, yanling pei, celine barreteau, David Berardan, Nita Dragoe, Wei Cai and Jiaqing He
Energy Environ. Sci., 2012, Accepted Manuscript