SBIR Phase I: High Capacity Anode Materials for Lithium Ion Batteries

*** 9760456 Wixom这个小企业创新研究一期项目将开发锂离子电池电极的先进材料。对这些材料进行加工，通过控制其微观结构来增加可逆锂存储容量，降低不可逆锂存储容量。第一个任务将是系统地改变应用于至少两种通常用于商业电池的材料的工艺条件。电极的微观结构将通过衍射和孔隙率法进行评估，微观结构的变化将与工艺条件有关。电极将被制造和组装成测试电池，使用金属锂作为参比和反电极。这些电池将循环使用以测量容量和极化。将开发一种工艺设计，以证明经济和技术可行性。第二阶段将从高度控制的实验室规模工艺过渡到目前用于陶瓷粉末加工的大型工业工艺。该项目将提高可充电锂离子电池的容量和运行时间。到2000年，这些电池的市场预计将增长到2.5亿美元以上。对于摄像机、笔记本电脑和蜂窝通信等应用程序，操作时间可能是最重要的选择标准。＊＊＊

*** 9760456 Wixom This Small Business Innovation Research Phase I project will develop advanced materials for lithium ion battery electrodes. These materials will be processed to increase the reversible lithium storage capacity and decrease the irreversible capacity through control of their microstructure. The first task will be to systematically vary the process conditions applied to at least two materials typically used in commercial batteries. The electrode microstructures will be evaluated by diffraction and porosimetry, and changes in the microstructure will be related to process conditions. Electrodes will be fabricated and assembled into test cells using metallic lithium as the reference and counter electrode. The cells will be cycled to measure capacity and polarization. A process design will be developed to demonstrate economic as well as technical feasibility. Phase II will transition from highly controlled laboratory-scale processes to larger industrial processes presently used in ceramic powder processing This project will improve the volumetric capacity and operating times of rechargeable lithium ion batteries. The market for these batteries is expected to grow to over $250 million by 2000. Operating time is perhaps the single most important selection criterion for applications such as camcorders, laptop computers, and cellular communication. ***