摘要：
Thermoelectricity (TE) refers to direct conversion between heat into electrical energy and by versa via thermoelectric phenomena. One of the thermoelectric effects is known as the Seebeck effect and it was first discovered by Thomas Johann Seebeck in 1821. This physical principles involve the entropy nature of energy and describe how a thermal electromotive force pairs with the temperature gradient, ΔT, present in a
conductive material. Recently oxide materials has been focused as new thermoelectric materials. Thermoelectric oxide materials therefore are more suitable in term of their use under avariety of aggressive environmental conditions that including high temperature, corrosive and radioactive environments. Only recently, the area of TE has seen a major breakthrough with the sensational discovery of high temperature transition-metal-oxide based materials, such as NaxCoO2. Structurally, NaxCoO2 consists of alternate stacks of two-dimensional hexagonal Co lattice sheets, octahedrally coordinated with O above and below the Co planes. The resulting CoO2 layers are stacked along the hexagonal c-axis such that the Na layers work only as a charge to stabilize the crystalline structure. One study has shown that the thermal conductivity of polycrystalline Na0.5CoO2 is comparable to that of Bi2Te3. With their high Seebeck values and goodelectrical conductivity, it has been recently shown that in its single crystal form, a ZT ~1.5 has been observed for this material at elevated temperature .therefore new oxide based thermoelectric materials are desired. However due to a lot of candidates and process parameters, we could not fix the materials and synthesis parameters.
It has passed more than 10 years since the modern combinatorial materials science appeared with new tools for high throughput characterizations. Recently this combinatorial methodology is recognized to be an innovative tool to discover new materials and expectation for this method is potentially increasing. In this talk, we show some examples which combinatorial materials synthesis accelerate materials screening and emphasize the importance of international collaboration and the materials informatics, which gives a new technical fusion with materials science and information technology.