Collaborative Research: Co-Extrusion of Organic-Inorganic Colloidal Inks for Energy Conversion Applications

合作研究：用于能量转换应用的有机-无机胶体油墨共挤出

基本信息

批准号：
1727668
负责人：
Marta Hatzell
金额：
$ 22.82万
依托单位：
Georgia Tech Research Corporation
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-09-01 至 2021-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1727668&HistoricalAwards=false
关键词：
Collaborative Research Co Extrusion Organic

项目摘要

Energy storage (batteries) and energy conversion systems (fuel cells) are composed of planar, layered structures often referred to as membrane electrode assemblies. One of the primary limitations with these systems is the multi-step materials processing associated with manufacturing. Extrusion manufacturing methods offers the opportunity to combine multiple materials systems at once for integrated and engineered part development for electrochemical systems. One of the key challenges in achieving this is the engineering of colloidal inks capable of producing uniform parts with controlled properties. In this project, colloidal inks, which can be described as semi-solid or semi-liquid, consist of platinum coated carbon particles in a polymeric base. The work will investigate how these complex inks behave under extrusion conditions, and how they interface with other co-extruded inks. A fundamental understanding about co-extrusion processing of colloidal inks will potentially enable facile and scalable manufacturing methods for multi-layered structures and components common in electrochemical systems. Moreover, colloidal co-extrusion has broad application in the manufacturing of novel composite materials, organic electronics, thermoelectric, photovoltaics, bio-materials, and batteries. In addition to providing graduate and undergraduate students research experiences, this project will contribute towards broadening manufacturing education in K-12 programs in the Nashville and Atlanta areas. Complex material systems are rarely processed using co-extrusion based approaches due to the inherent difficulties which arise due to mechanical and fluid induced instabilities. These instabilities are well documented and broadly understood for single component extrusion processing (e.g. polymers), but there have been limited studies that probe multi-component colloidal materials. The research objective of this work is to explore the interactions between soft and hard colloids during co-extrusion processes. The work specifically seeks to understand how interactions between components in an ink affects viscoelastic properties and promote or dampen ink mixing or delamination mechanisms. This work will utilize advanced characterization techniques (scattering and microcopy) to probe colloid structure information and define unique constitutive equations to describe functional properties in extruded colloidal inks. Moreover, these constitutive relationships will be used to engineer colloidal inks that promote interfacial stability during extrusion processes. This work is fundamental in nature and the product of this work is relevant to the manufacturing community as well as the rheological, electrochemical, and colloidal science communities.

储能（电池）和能量转换系统（燃料电池）由平面，分层结构组成，通常称为膜电极组件。这些系统的主要局限性之一是与制造相关的多步材料处理。挤出制造方法提供了机会一次结合多种材料系统，以用于电化学系统的集成和工程部分开发。实现这一目标的关键挑战之一是胶体墨水的工程，能够生产具有受控性能的均匀零件。在这个项目中，可以描述为半固体或半液体的胶体墨水由聚合物碱中的铂涂层碳颗粒组成。这项工作将调查这些复杂的墨水在挤出条件下的行为，以及它们如何与其他共同侵入墨水互动。对胶体墨水的共排序处理的基本理解将有可能为电化学系统中常见的多层结构和组件提供便捷和可扩展的制造方法。此外，胶体共排产在新型复合材料，有机电子，热电，光伏，生物材料和电池的生产中广泛应用。除了提供毕业生和本科生的研究经验外，该项目还将有助于扩大纳什维尔和亚特兰大地区K-12计划的制造教育。由于机械和流体诱导的不稳定性引起的固有困难，因此很少使用基于共结的方法来处理复杂的材料系统。这些不稳定性已得到充分的文献记载和广泛理解，用于单个组件挤出处理（例如聚合物），但是有限的研究探究了多组分胶体材料。这项工作的研究目的是探索在共排序过程中软胶体和硬胶体之间的相互作用。这项工作特别寻求了解墨水中组件之间的相互作用如何影响粘弹性特性，并促进或抑制墨水混合或分层机制。这项工作将利用高级表征技术（散射和微拷贝）来探测胶体结构信息，并定义独特的组成型方程来描述挤出的胶体墨水中的功能性能。此外，这些构型关系将用于设计胶体墨水，以促进挤压过程中界面稳定性。这项工作在性质上是基本的，这项工作的产物与制造业社区以及流变，电化学和胶体科学社区有关。