SBIR Phase II: High Energy Density Nanodielectrics for Commercial Pulse Power Applications

这个小企业创新研究（SBIR）二期项目的重点是开发一种用于高脉冲功率电容器的新型高能量密度纳米复合介电材料。该方法是将纳米结构聚集在聚丙烯基体中，形成一种具有高有效介电常数、高击穿电压和低耗散因子的新型纳米复合材料。在第一阶段，我们成功地将化学修饰的铁电纳米粒子均匀分散到聚丙烯（PP）基体中，形成一种具有高效介电常数和高能量密度的新型材料，用于电容器应用。该薄膜的带电能密度为6.85 J/cm3，介电常数为31.97，击穿电压为220 MV/m。这种高能量密度和高介电常数的结合在以前的商用PP或PP纳米复合介质薄膜中都没有实现过。第二阶段的工作旨在开发一种适合商业化这些用于电容器应用的高能量密度纳米介电薄膜的原型工艺。该项目更广泛的影响/商业潜力是引入新的高性能纳米复合介电材料。所提出的材料可用于商用高功率脉冲、快脉冲和高能量密度电容器，从而减小尺寸、减轻重量并改进电路设计。所提出的纳米复合介质技术可以在各种工业领域中发挥必要的作用。商业机会包括用于医疗、通信、运输和配电系统的所有高能量密度电子设备和包装，产品包括植入式和便携式除颤器、碎石机、医疗和商业激光器、脉冲形成网络、交流电机、超声波换能器、频闪灯、汽车加速和能量回收系统。所提出的纳米复合介电材料也可用于军事和航空航天电子器件。此外，这种新型纳米复合材料可能会使电容器以外的新设备需要这种新型材料系统的独特性能。

This Small Business Innovation Research (SBIR) Phase II project focuses on developing a new category of high energy-density nanocomposite dielectric materials for use in high pulse power capacitors. The approach is to bring together nanostructures in a polypropylene matrix to form a novel nanocomposite material with high effective dielectric constant, high breakdown voltage, and low dissipation factor. In Phase I we successfully produced a nanocomposite dielectric material by uniformly dispersing chemically modified ferroelectric nanoparticles into a polypropylene (PP) matrix to form a novel material with high effective dielectric constant and high energy density for capacitor applications. This high nanoparticle content film exhibits a charged energy density of 6.85 J/cm3, a dielectric constant of 31.97, and breakdown voltage of 220 MV/m. This combination of high energy density and high dielectric constant has not been attained previously from either commercial PP or PP nanocomposites dielectric films. The Phase II effort is directed towards developing a prototype process suitable for commercializing these high energy density nanodielectric films for capacitor applications. The broader impact/commercial potential of this project is the introduction of new highperformance nanocomposite dielectric materials. The proposed materials could be employed in commercial high-power pulse, fast pulse, and high-energy density capacitors, resulting in reduced size, reduced weight, and improved circuit design. The proposed nanocomposite dielectric technology can make a needed difference in a variety of industrial fields. The commercial opportunities include all high energy density electronic devices and packaging for medical, communication, transportation, and power distribution systems, in products such as implantable and portable defibrillators, lithotripters, medical and commercial lasers, pulse forming networks, A.C. motors, ultrasonic transducer exciter, strobe lighting, and acceleration and energy recovery systems of automobiles. The proposed nanocomposite dielectric materials can also be used in military and aerospace electronic devices. In addition, this new class of nanocomposite materials may enable new devices besides capacitors that need the unique properties of this novel material system.