Engineering Creativity Award: Lithium Iodine Battery Systems

这项研究的主要目的是提高锂碘(PZVP)电池系统的功率密度能力，并深入了解阴极在电池限速机制中的作用，特别是在放电电流方面。研究计划如下。首先，电池将采用新的正极制备工艺制造。将确定低倍率下的一般放电行为，以便与传统电池进行比较。然后将评估高倍率放电性能。为了评估阴极修饰的有效性，将使用多种方法。激光全息干涉法和电化学阻抗谱将分别用于现场监测放电的均匀性和碘化锂电解液的电导率。试验后将使用扫描电子显微镜来确定改性对废气产物形成的影响，并与现场测试结果相关联。根据所获得的结果，可以包括进一步的阴极制备修改。通过修改电池化学和制造工艺，可以实现电能输送能力的潜在数量级增长。这种增强型电池系统可以在更广泛的植入式设备中找到新的应用，包括多输入/输出可编程起搏器、植入式除颤器、植入式药物输送系统以及其他重要的工业和深空应用。

The primary objective of this research effort are to enhance the power density capabilities of the lithium iodine (PZVP) battery system and to provide an in-depth understanding of the role of the cathode in the battery rate limiting mechanism particularly with respect to discharge current. The plan of research is as follows. First the batteries will be fabricated employing the new cathode preparation procedure. General discharge behavior at low rates will be determined for comparison to conventional batteries. High rate discharge performance will then be evaluated. In order to evaluate the effectiveness of the cathode modification a number of methods will be utilized. Laser holographic interferometry and electrochemical impedance spectroscopy will be used in-situ to monitor the uniformity of discharge and the lithium iodide electrolyte conductivity respectively. Post-test scanning electron microscopy will be employed to determine the influence of the modification on discharte product formation and correlation with in- situ testing results. Depending on the results obtained further cathode preparation modifications may be included. Potentially an order of magnitude increase in power delivery capability is attainable by modifying cell chemistry and manufacturing procedure. This enhanced battery system could find new application in a broader class of implant devices including multi-input/output programmable pacemakers, implantable defibrillators, implantable drug delivery systems as well as other important industrial and deep space applications.