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

硫代溶胶凝胶衍生的二硫化钛颗粒的微观结构设计

• 批准号: 9700343
• 负责人: Prashant Kumta
• 金额: $ 27.5万
• 依托单位: Carnegie-Mellon University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-09-01 至 2001-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9700343&HistoricalAwards=false
• 关键词: Microstructural; Design; Thio; Sol; Gel

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.

本研究的主要目的是更好地了解多晶TiS2和其他粉末的微观结构演变的原子和分子过程。第二目的是研究所得薄层的电化学性能，热处理和充电对颗粒微观结构的影响。晶粒尺寸、形状、晶粒尺寸、取向和化学计量学对电化学性能的影响以及微观结构演变的机制将通过差热分析和热重分析、扫描和透射电子显微镜进行研究。如果成功，该研究可能为合成具有最佳电化学性能的工程微观结构提供一种方法。应用领域包括电化学电池。初步测试表明，在给定性能降低的情况下，充电循环次数急剧增加。