Self-Assembled Polymer Electrolyte Nanoarchitectures for Flexible Batteries

美国国家科学基金会-化学与安防运输系统颗粒与多相工艺计划部门(1415年)摘要建议编号：0728975首席研究员：科菲纳斯，彼得隶属：马里兰大学提案标题：用于柔性电池的自组装聚合物电解质纳米体系结构智力价值：近年来，人们对聚合物电池的兴趣急剧增加。随着用于手机和笔记本电脑的锂电池的出现，对全固态电池的搜索仍在继续。电流配置在阳极和阴极之间有液体或凝胶电解液。随着时间的推移，这会导致电解质损失和性能下降的问题。聚合物电解质比传统的无机玻璃或陶瓷电解质更具柔顺性。本研究的目标是研究基于嵌段共聚物自组装的新型纳米级聚合物电解质柔性薄膜。以聚环氧乙烷(PEO)为第一嵌段，聚甲基丙烯酸甲酯和聚甲基丙烯酸无规共聚物(PMMA-RAN-PMAA)为第二嵌段合成嵌段共聚物。将合成的聚合物从溶剂中浇注得到自组装的柔性纳米复合材料结构，具有高离子导电性和高锂离子迁移率。各种微观结构和电学性能表征工具将被用来评估自组装纳米结构聚合物电解质的性能。采用凝胶渗透色谱结合光散射法测定聚合物的相对分子质量和多分散指数。用透射电子显微镜对柔性薄膜和块体聚合物薄膜的微观结构进行表征。聚合物电解液复阻抗谱将用于评估离子传输，循环伏安法用于电池电位。广泛影响：拟议研究的更广泛影响涉及嵌段共聚纳米电池系统，该系统将是灵活的，因为它是由聚合物制成的。聚合物电解液易于加工，这将使薄膜纳米级自组装柔性电池的生产成为可能，这些电池可以缠绕成线圈或加工成涂层和薄片。基于嵌段共聚物的纳米级自组装的固体聚合物电解质将提供具有集成电子学的器件，但作为独立的柔性薄膜或涂层分布在大面积的衬底上。有源电路元件将直接集成在柔性基板上。这项工作将开展的教育活动包括本科生和研究生课程的开发，研究生指导，以及对不同群体的本科生和高中生的培训。

National Science Foundation - Division of Chemical &Transport Systems Particulate & Multiphase Processes Program (1415)ABSTRACTProposal Number: 0728975 Principal Investigators: Kofinas, Peter Affiliation: University of Maryland Proposal Title: Self-Assembled Polymer Electrolyte Nanoarchitectures for FlexibleBatteries Intellectual Merit:In recent years, the interest in polymeric batteries has increased dramatically. With the advent of lithium batteries used in cell phones and laptop computers, the search for an all solid state battery has continued. Current configurations have a liquid or gel electrolyte between the anode and cathode. This leads to problems with electrolyte loss and decreased performance over time. Polymer electrolytes are more compliant than conventional inorganic glass or ceramic electrolytes. The goal of the proposed research is to investigate novel nanoscale polymer electrolyte flexible thin films based on the self-assembly of block copolymers. Block copolymers will be synthesized, consisting of polyethylene oxide (PEO) as the first block, and a random copolymer of poly(methylmethacrylate) and poly(methacrylic acid) (PMMA-ran-PMAA) as the second block. Casting of the synthesized polymer from a solvent results in a self-assembled flexible nanocomposite structure, with high ionic conductivity and high lithium ion transference. A variety of microstructure and electrical properties characterization tools will be employed to evaluate the self-assembled nanostructured polymeric electrolyte's performance. Molecular weight and polydispersity index are to be determined using gel permeation chromatography combined with light scattering. The microstructure of flexible thin and bulk polymer films will be characterized by transmission electron microscopy. Polymer electrolyte complex impedance spectroscopy will be performed to assess ion transmission and cyclic voltammetry to address cell potentials.Broader Impacts:The broader impacts of the proposed research relate to a block copolymer nanoscale battery system which would be flexible because it is made out of a polymer. The ease of processing a polymer electrolyte would allow the production of thin film nanoscale self-assembled flexible batteries that could be wound into coils or processed as coatings and sheets. A solid polymer electrolyte based on the nanoscale self-assembly of block copolymers will provide devices with integrated electronics, yet distributed over a large area substrate as freestanding flexible films or coatings. The active circuit components would be directly integrated on the flexible substrate. The education activities to be undertaken in this work include undergraduate and graduate course development, graduate student mentoring, and training of a diverse population of undergraduate and high school students.