SBIR Phase II: High Rate, High Capacity Anodes for Rechargeable Lithium Batteries

这个小企业创新研究二期项目将开发用于可充电锂离子电池的更高储能电极材料。锡基氧化物材料具有诱人的可逆电荷存储能力，但具有较高的首次循环损耗。在第一阶段，展示了新的锡基材料，具有优越的容量和显著降低的第一循环损耗。体积电荷存储能力是商用碳基负极材料的三倍。这些专利材料是基于高度分散和稳定在导电陶瓷基质中的纳米级TiN微区。在第二阶段，将对两个陶瓷宿主进行调查。前驱体化学成分、锡原子分数和反应条件将在容量和循环性方面进行优化。这些材料的成分和微观结构将被确定，并与速率和循环寿命相关联。将准备和评估测试电池，以确定它们的容量和循环能力。将解决可生产性问题，如前体成本、工艺扩大以及与现有电池组件(如电解液、隔膜、粘结剂、电流收集器)的兼容性。最终目标是证明在第一阶段展示的容量可以实现，同时满足消费电子产品中使用的可充电电池的成本和循环寿命要求。该项目将开发先进的电极材料，以增加运行时间或减少可充电锂离子电池的尺寸和重量。用于消费电子产品(无线通信、笔记本电脑、便携式摄像机)以及电动汽车推进的锂离子电池市场增长迅速。

This Small Business Innovation Research Phase II project will develop higher energy storage electrode materials for rechargeable lithium ion batteries. Tin-based oxide materials have attractive reversible charge storage capacities but high first-cycle losses. In Phase I, new tin-based materials were demonstrated with superior capacity and significantly reduced first-cycle loss. The volumetric charge storage capacity was three times better than commercially established carbon-based anode materials. These proprietary materials are based on nanoscale tin domains highly dispersed and stabilized within a conductive ceramic matrix. In Phase II, two ceramic hosts will be investigated. Precursor chemistries, tin atomic fraction, and reactive conditions will be optimized with respect to capacity and cyclability. The composition and microstructure of these materials will be determined and correlated with rate and cycle life. Test cells will be prepared and evaluated to determine their capacity and cyclability. Producibility issues such as precursor cost, process scale-up, and compatibility with established cell components (e.g. electrolyte, separator, binder, current collector) will be addressed. The ultimate goal is to demonstrate that the capacities demonstrated in phase I can be realized while simultaneously meeting the cost and cycle life requirements for rechargeable batteries used in consumer electronics.This project will develop advanced electrode materials that will increase the run tim or reduce the size and weight of rechargeable lithium ion batteries. There is a rapidly growing market for lithium ion batteries for consumer electronics (wireless communications, laptop PC's, camcorders), as well as for electric vehicle propulsion.