本项目致力于研究具有"电子晶体-声子液体"特性的超导离子体Cu2-xSe基热电模块形状稳定性与热电性能增强机理。Cu2-xSe基热电材料预期具有超高ZT, 具有巨大的商业应用前景。但其在中、高温温差发电时热端容易产生形变。本项目在过去一年研究的基础上，探讨出形成形变的原因是由于温差发电时产生了Cu+(I)的缺失,导致熔点下降引起的。为此，本项目拟掺入比Se熔点高的非金属元素替代Se来提高Cu2-xSe基热电模块的熔点。另一方面，拟通过调制阳离子环境来调制该超导离子体的电导率与热导率，从而提高其ZT。以上提出的这两种方法都是本项目的关键点和创新点。本项目通过以上研究探索出提高Cu2-xSe基热电模块在温差发电时的形状稳定性的途径，总结出提高Cu2-xSe基热电模块热电性能的阳离子掺杂规律，制备出ZT>1.9的模块。为Cu2-xSe的商业应用提供应用基础理论和关键技术。

This project focuses on the improvement of shape stability and thermoelectric properties of superionics Cu2-xSe bulk characteristic of "electron crystal, phonon liquid". Cu2-xSe is expected to possess very big ZT,which meets the commercial requirement of thermoelectrics. Unfortunately, the hot end of Cu2-xSe module is bent or deformed during working at moderate or elevated temperature. In our research last year it was found that the above-said "bent" or "deformed" is aroused by dropped melting point (MP) owing to the deficiency of Cu+(I).Consequently, this project trys to increase the MP of Cu2-xSe module through doping non-metal element with higher MP than that of Se element.And for commercial purpose, this project also pursue for enhancing the ZT of Cu2-xSe-based bulk by doping cation, which can adjust the devoids that dominantly influence the electrical conductivity and thermoelectrical conductivity, therefore ZT. The above-proposed methods are the key points, as well as the creativities of this project.By this project, the way to improve the shape stability of Cu2-xSe bulk during working at moderate or elevated temperature will be found, and the doping requirements of enhancing ZT of Cu2-xSe module can be given,as well as a module with ZT equal to or larger than 1.9 will be produced.This project will supply basic application theory and key technology of Cu2-xSe for the commercial application purpose.