SnSe基热电材料因其优异的性能和较低的毒性，近年来受到热电研究领域广泛关注。本项目针对SnSe多晶材料在300-773 K温区热电优值（ZT）较低的问题，以Sn(Se,S)为研究对象，拟采用溶液法宏量制备S固溶量精确调节、形貌可控的Sn(Se,S)纳米材料，并原位复合低维碳材料，结合快速烧结得到Sn(Se,S)/低维碳织构化纳米复合材料。利用织构度调控提升材料的载流子迁移率；通过高载流子迁移率低维碳的引入及其形成界面的声子散射作用，实现热电输运性能协同优化；结合S固溶和元素掺杂调控，获得上述温区ZT值的大幅提升。项目预期将实现Sn(Se,S)/低维碳纳米复合材料的可控构筑，揭示织构度、碳复合与热电性能之间的关联规律，阐释该复合材料中独特的电、热输运机制，为其他层状结构硫族化合物的热电性能提升提供思路。

SnSe-based thermoelectric materials combine excellent thermoelectric performance with relatively low toxicity, and therefore have received extensive attention from the thermoelectric community. However, the figure of merit (ZT) values within the temperature range of 300-773 K of SnSe polycrystalline materials are relatively low. In this project, we will realize the large-scale solution synthesis of Sn(Se,S) nanomaterials with tunable S concentration, controllable morphology and in-situ attached low-dimensional carbon that will be sintered into Sn(Se,S)/carbon nanocomposites. To achieve exceptional thermoelectric performance at above-mentioned temperature range, we will increase the carrier mobility by texture modulation, synergistically optimize the thermoelectric transport properties by utilizing the high carrier mobility of carbon and enhanced interface phonon scattering, as well as tune the S concentration and doping level. This project will realize the controllable fabrication of Sn(Se,S)/carbon nanocomposites, disclose the relationship between texturing degree/carbon incorporation and thermoelectric performance and the relevant transport mechanism, as well as shed light on the thermoelectric performance enhancement of other layer-structured chalcogenides.