Lithium-Ion Batteries for Implanted Medical Devices

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植入的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制剂，其将安全地使得能够从植入的锂离子（Li离子）可再充电电池提取更多能量。具体而言，我们提出了制备和评估一组凝胶聚合物电解质，其包含不易燃、电化学稳定和热稳定的离子液体。将构建和测试包含新电解质的锂离子电池，重点是建立与高度脱锂的阴极材料直接接触的凝胶聚合物电解质的内在稳定性。为此，我们将采用差示扫描量热法来确定阴极材料和电解质之间的热化学反应的开始作为阴极的充电状态的函数。如果成功，我们将开始一项计划，以建立和质量的原型锂离子电池，将允许植入设备安全地运行在内部电源更长的时间。拟议的商业应用：不可用

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 implanted artificial heart patient with significant 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. Specifically, we proposed to prepare and evaluate a group of gel polymer electrolytes comprising ionic liquids that are non-flammable, electrochemically stable, and thermally robust. Li-ion cells incorporating the new electrolytes will be built and tested with a focus on establishing the intrinsic stability of the gel polymer electrolyte in direct contact with highly delithiated cathode materials. To this end we will employ differential scanning calorimetry to determine the onset of thermochemical reactions between cathode material and electrolyte as a function of the cathode's state of charge. If successful, we will embark on a program to build and quality prototype Li-ion batteries that will allow implanted devices to safely operate on internal power for longer period of time. PROPOSED COMMERCIAL APPLICATIONS: Not Available