Novel, Stable, Non-Complexing Anions for Rechargeable Lithium Batteries

前一阶段工作的主要目标是 确定两种新的锂盐LiN（CF 3SO 2）2和 LiSbF 6与合适的溶剂相结合， Li/Ti S2非密封全电解质的最新技术水平 细胞 测定并证明LiN（CF_3SO_2）_2具有 用于这种锂系统的所需特性。 第二阶段的工作将在三个方面进行：（1）利用 已建立的纯化和合成技术， LiN（CF_3SO_2）_2和另外两种新的有机洋葱锂盐（2） 测定了这些盐在 锂和溶剂在极端电位和在全 电池循环条件，以及（3）进行全电池循环研究 在Li/TiS 2测试电池中，在与以下相关的电流密度下循环： 商业应用。 提供高能量的可充电锂电源 高速率下的密度具有许多潜在的商业用途， 卫星的电源系统，便携式通讯设备 以及用于其它负载均衡应用。 中的一个关键问题 过去的问题是锂电极的循环性能差。通常 用过的盐在可再充电方面不足， 要么是内在的不稳定性，要么是缺乏适当的纯化。 因此，PI将在全细胞中合成、纯化和测试， 这三种盐是不可商购的， 最终将一种非常安全的可充电锂电池商业化， 电池

The prime objective of the previous Phase I effort was to establish whether two new lithium salts, LiN (CF3SO2)2 and LiSbF6, in combination with a suitable solvent, could outperform state of the art electrolytes in Li/Ti S2 non-hermetic full cells. It was determined and demonstrated that LiN(CF3SO2)2 had the desirable characteristics for use in such lithium systems. The Phase II work will be in three areas: (1) utilizing established techniques of purification and synthesis to prepare LiN (CF3SO2)2 and two other, new organic onion lithium salts, (2) determination of the reactions of these salts in both lithium and solvent at extreme potentials and under full cell cycling conditions, and (3) doing full cell cycling studies in Li/TiS2 test cells cycled at current densities relevant to commercial applications. Rechargeable lithium power sources which provide high energy densities at high rates have many potential commercial uses as power systems in satellites, in portable communications equipment and for other load-leveling applications. A key problem in the past was the poor cycleability of the lithium electrode. Commonly used salts are deficient with respect to rechargeables owing either to intrinsic instability or lack of proper purification. The PI will therefore synthesize, purify and test in a full cell, three salts that are not commercially available and hopes to ultimately commercialize a very safe rechargeable lithium battery.