Scalable Assembly of Flexible and Thermally Conductive Graphene Paper Macroscopic Structures for Effective Thermal Management in Electronic Devices

柔性导热石墨烯纸宏观结构的可扩展组装，用于电子设备中的有效热管理

• 批准号: 1463083
• 负责人: Jie Lian
• 金额: $ 25万
• 依托单位: Rensselaer Polytechnic Institute
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-07-01 至 2019-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1463083&HistoricalAwards=false
• 关键词: Scalable; Assembly; Flexible; Thermally; Conductive

Innovative thermal management solutions to address ever-increasing challenges of heat generation are critical for future higher power, more compact and ultra-lightweight electronics. Current state-of-the-art materials such as flexible graphitic films for thermal management of high power electronics are not cost-effective since they are expensive to manufacture. Graphene, a single layer of carbon atoms bonded in a hexagonal lattice, is one of the thinnest and strongest of materials, and also displays intrinsically exceptional thermal conductivity. Macroscopic graphene structures, assembled from single layer graphene nanosheets, offer immense potential as advanced materials for effective thermal management. However, key challenges exist for the scalable assembly of two-dimensional graphene nanosheets into three-dimensional macroscopic structures, which is usually accompanied by a significant reduction of the thermal properties. To find solutions to address these key challenges, this award supports fundamental nano-scale manufacturing science of effectively assembling graphene nanosheets into large-scale three-dimensional architectures that are designed for performance in a cost-effective manner. These assembled macroscopic structures are highly flexible, mechanically robust and exceptionally thermal conductive, unlocking the enormous commercial potential of graphene as advanced materials for nano-scale thermal management. The results from this project will benefit the US economy and society. This project has synergistic educational and outreach impacts through integration of research and education and engaging participation of underrepresented groups.This project will develop innovative approaches of integrating two well-established industrial processes of electrospray deposition and roll-to-roll processing for manufacturing flexible graphene papers with breakthrough thermal properties. The research will establish process-microstructure-property relationships in electrospray deposited and assembled graphene papers through experimentation. Post-assembly high temperature annealing and mechanical compaction for microstructural optimization and graphene sheet alignment will be performed in order to improve properties. A game-changer is the direct manufacturing of the graphene nanosheets from defect-free graphene using electrospray deposition. Superior properties will be achieved in the macroscopic graphene structure without the penalty of traditional energy-intensive high temperature annealing. The scalable and cost-effective approach developed in assembling two-dimensional nanosheets into three-dimensional functional architectures will have a broader impact on controllable assembly and design of functional architectures of other two-dimensional single atomic layer materials beyond graphene.

创新的热管理解决方案能够应对日益严峻的发热挑战，对于未来更高功率、更紧凑和超轻量的电子产品至关重要。目前最先进的材料，例如用于高功率电子设备热管理的柔性石墨薄膜，由于制造成本昂贵，因此不具有成本效益。石墨烯是按六方晶格键合的单层碳原子，是最薄、最强的材料之一，并且还表现出本质上优异的导热性。由单层石墨烯纳米片组装而成的宏观石墨烯结构，作为有效热管理的先进材料具有巨大的潜力。然而，将二维石墨烯纳米片可扩展组装成三维宏观结构存在关键挑战，这通常伴随着热性能的显着降低。为了找到解决这些关键挑战的解决方案，该奖项支持基础纳米级制造科学，将石墨烯纳米片有效组装成大规模三维架构，这些架构旨在以经济高效的方式实现性能。这些组装的宏观结构具有高度灵活性、机械坚固性和出色的导热性，释放了石墨烯作为纳米级热管理先进材料的巨大商业潜力。该项目的成果将惠及美国经济和社会。该项目通过研究和教育的整合以及代表性不足群体的参与，产生协同教育和推广影响。该项目将开发创新方法，整合电喷雾沉积和卷对卷加工这两种成熟的工业工艺来制造柔性石墨烯纸具有突破性的热性能。该研究将通过实验建立电喷雾沉积和组装石墨烯纸的工艺-微观结构-性能关系。将进行组装后高温退火和机械压实，以优化微观结构和石墨烯片排列，以提高性能。改变游戏规则的是使用电喷雾沉积从无缺陷石墨烯直接制造石墨烯纳米片。宏观石墨烯结构将实现优异的性能，而不会受到传统能源密集型高温退火的影响。将二维纳米片组装成三维功能架构所开发的可扩展且具有成本效益的方法将对石墨烯以外的其他二维单原子层材料的可控组装和功能架构设计产生更广泛的影响。