Microstructural Design of Thio-Sol-Gel Derived Titanium Disulfide Particles

这项建议的主要目的是更好地了解多晶TiS_2和其他粉末的微观结构演变所涉及的原子和分子过程。次要目的是研究所得到的薄层的电化学性质、热处理和充电对颗粒微结构的影响。通过差热分析、热重分析、扫描电子显微镜和透射电子显微镜研究了颗粒大小、形状、微晶尺寸、取向和化学计量比对电化学性质的影响以及微观结构演变的机理。如果成功，这项研究可能提供一种方法来合成具有最佳电化学性能的工程化微结构。应用包括电化学电池。初步测试表明，在给定的性能下降情况下，充电循环的次数会急剧增加。

The main objective of this proposal is better understanding of underlying atomic and molecular processes involved in the microstructural evolution of polycrytalline TiS2 and other powders synthesized using the thi-sol-gel process previously proposed by the P.I. A secondary objective is to investigate the electrochemical properties of the resulted thin layer, the influence of heat treatment and of charging on the particulate microstructure. The effects of particle size, shape, crystallite size, orientation and stoichiometry on the elctrochemical properties and the mechanisms involved in the evolution of the microstructure will be investigated using differential thermal and thermogravimetric analyses, scanning and transmission electron microscopy. If successful, the research may provide a method to synthesize an engineered microstructure with optimal electrochemical properties. Applications include electrochemical batteries. The preliminary test have indicated a dramatic increase of the number of charging cycles for a given reduction in performance.