Ionically Conductive Polyelectrolyte Multilayers for Microbattery Applications

聚电解质与其他多价有机和无机物质的交替吸附在过去十年中已经发展成为材料科学的一个快速发展的新领域。多层组装技术涉及从稀水或混合溶剂溶液中交替吸附带相反电荷的物质，已被用于创建许多具有电学、光学、电介质和电化学功能的系统。采用逐层组装技术可以制备出具有高均匀性的超薄薄膜。制造的便利性，在纳米尺度上控制薄膜结构的能力，以及薄膜最终性能的可调性，使得聚电解质多层膜作为微米尺度电池应用的组件变得有趣。哈蒙德研究小组最近的工作已经产生了许多微加工技术，这些技术允许将功能聚合物多层结合到微米级器件中。该小组的新工作还通过使用高酸性多离子（如全氟磺化离子）和聚乙烯氧化物的掺入，使聚电解质多层膜的固态离子电导率提高了几个数量级。这项工作的目标是开发适合薄膜电池应用的具有离子电导率的新型聚电解质多层系统，利用多层组装工艺提供的纳米尺度控制来开发具有梯度电子电导率的电池电极组件的电解质薄膜，并应用该小组开发的非光刻微加工技术来制造廉价，易于制造的塑料多层电池器件。用于塑料和纸薄膜电子应用的玻璃或纸基板。

The alternating adsorption of polyelectrolytes and other multivalent organic andinorganic species has evolved in the past decade into a quickly developing new field ofmaterials science. The multilayer assembly technique, which involves the alternatingadsorption of oppositely charged species from dilute aqueous or mixed solvent solutions,has been used to create a number of systems with electrical, optical, dielectric andelectrochemical functionality. Ultrathin films with high uniformity are can be createdusing layer-by-layer assembly techniques. The ease of fabrication, ability to control filmstructure on a nanometer length scale, and the tunability of the final properties of the filmmake polyelectrolyte multilayer approaches interesting as components in micron scalebattery applications. Recent work from the Hammond research group has resulted in anumber of microfabrication techniques that allow the incorporation of functional polymermultilayers into micron scale devices. New work in this group has also led to orders ofmagnitude increases in the solid state ionic conductivity of polyelectrolyte multilayerfilms through the use of highly acidic polyions such as perfluorosulfonated ionomers, andthe incorporation of polyethylene oxide. The goals of this work are to develop newpolyelectrolyte multilayer systems with ionic conductivities suitable for thin film batteryapplications, to take advantage of the nanometer scale control that multilayer assemblyprocesses provide to develop electrolyte films with gradient electronic conductivities forbattery electrode components, and to apply nonlithographic microfabrication techniquesdeveloped in this group to create cheap, easily manufactured multilayer battery deviceson plastic, glass or paper substrates for plastic and paper thin film electronicsapplications.