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用固相反应方法,成功地合成了具有交互生长结构的LixNayCoO2单相多晶系列样品. 热电势测量表明,该系统的室温热电势比NaxCoO2体系约高出60μV/K. 基于空穴载流子具有O2p特征,提出LixNayCoO2中额外的热电势来源于氧空穴的占位熵.
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关键词:
- LixNayCoO2 /
- 热电势 /
- 热电材料
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.-
Keywords:
- Synthesis and thermopower measurement of LixNayCoO2 /
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