2005/11/29 by Zhi Ren, Jingqin Shen, Shuai Jiang +6
Chemistry · Materials Science · Physics and Astronomy · #Advanced Thermoelectric Materials and Devices #Chemistry #Cobalt #Cobalt oxide #Composite material #Condensed matter physics #Crystallite #Electrical engineering #Electrical resistivity and conductivity #Figure of merit #Magnetic and transport properties of perovskites and related materials #Materials science #Metallurgy #Optoelectronics #Oxide #Phase (matter) #Physics #Seebeck coefficient #Thermal Expansion and Ionic Conductivity #Thermal conductivity #Thermodynamics #Thermoelectric effect #Thermoelectric materials #cond-mat.mtrl-sci #cond-mat.str-el
paper · pdf · doi:10.1088/0953-8984/18/29/l01
published as J. Phys.: Condens. Matter 18, L379-L384 (2006) · Submitted to APL
arxiv created 2005/11/29 · openalex publication_date 2006/06/30 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report the measurements of thermopower, electrical resistivity and thermal conductivity in a complex cobalt oxide Li 0.48 Na 0.35 CoO 2 , whose crystal structure can be viewed as an intergrowth of the O3 phase of Li x CoO 2 and the P2 phase of Na y CoO 2 along the c -axis. The compound shows a large room-temperature thermopower of ∼180 µV K −1 , which is substantially higher than those of Li x CoO 2 and Na y CoO 2 . The figure of merit for the polycrystalline sample increases rapidly with increasing temperature, and achieves nearly 10 −4 K −1 at 300 K, suggesting that the Li x Na y CoO 2 system is a promising candidate for thermoelectric applications.