Open AccessSynthesis and thermopower measurement of LixNayCoO2
Author(s) -
Xiaoyang Chen,
Xiangfan Xu,
Hu Rong-Xing,
Zhi Ren,
Zhuan Xu,
Cao GuangHan
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.1627
Subject(s) - seebeck coefficient , crystallite , materials science , condensed matter physics , entropy (arrow of time) , thermodynamics , physics , composite material , thermal conductivity , metallurgy
Polycrystalline samples of LixNayCoO2 with an intergrowth structure have been successfully synthesized by solid-state reaction. The measured thermopower of LixNayCoO2 at room temperature is about 60 μV/K higher than that of NaxCoO2. Based upon the O2p characteristic for the mobile carriers, the origin of the increment in thermopower is interpreted in terms of the occupancy entropy of the O2p holes.