Lithium Ion Batteries for Implanted Medical Devices

描述（由申请人提供）： 现有技术的可再充电电池不能提供所需的高能量密度，以便使植入装置的患者从系留的外部电源中解脱出来。为左心室辅助装置患者或完全人工心脏患者提供显著更多的“脱离系绳”时间的能力将极大地改善他或她的生活质量。因此，我们提出的研究的目的是开发先进的电解质材料及其配方，这些材料及其配方将能够安全地从植入的锂离子（Li离子）可充电电池中提取更多的能量。在第一阶段，我们制定了一个新的家庭的离子液体为基础的凝胶聚合物电解质具有显着的性能，包括不燃性，增强的氧化稳定性，并在强制过充电的条件下，通过差示扫描量热法测定的耐热性。采用新电解质的锂离子电池可以在生理温度下反复循环到高充电电位，从而显著增加能量密度。在第二阶段，我们建议改进凝胶聚合物电解质配方，特别是在高电压下的锂离子电池安全性方面。根据与Wilson Greatbatch Technologies（WGT）（Clarence，NY）的联合协议，我们的先进电解质将被纳入螺旋缠绕AA电池中。WGT将这些电池置于各种滥用条件下，包括在高温下强制过度充电。我们预计，第二阶段的成功完成将导致广泛的先进锂离子电池，提供比传统电解质更高的能量密度。

DESCRIPTION (provided by applicant): State-of-the-art rechargeable batteries are incapable of providing the high energy densities required in order to free the device-implanted patient from a tethered external power source. The ability to provide a left ventricular assisted device patient or totally artificial heart patient with significantly more time "off-tether" would greatly improve his or her quality of life. Therefore, the aim of our proposed research is to develop advanced electrolyte materials and formulations thereof that would safely enable the extraction of more energy from an implanted lithium-ion (Li-ion) rechargeable battery. In Phase I we formulated a new family of ionic liquid-based gel-polymer electrolytes with remarkable properties including non-flammability, enhanced oxidative stability, and resistance to thermal excursions under conditions of forced overcharge as determined by differential scanning calorimetry. Li-ion cells that incorporated the new electrolytes could be repeatedly cycled at physiological temperatures to high charge potentials resulting in a significant increase in energy density. In Phase II we propose to refine the gel-polymer electrolyte formulation, particularly in respect to Li-ion cell safety at high voltages. Under a Consortium Agreement with Wilson Greatbatch Technologies (WGT) (Clarence, NY), our advanced electrolytes will be incorporated into spiral wound AA cells. WGT will subject these cells to a variety of abuse conditions including forced overcharge at elevated temperatures. We anticipate that the successful completion of Phase II will lead to a broad spectrum of advanced Li-ion batteries that offer significantly higher energy densities than are achievable with conventional electrolytes.