Nanomanufacturing of graphene nanosheets through nano-hole opening and closing
Nanomanufacturing of graphene nanosheets through nano-hole opening and closing
复制标题
DOI：
10.1016/j.mattod.2018.09.001
复制
发表时间：
2019-04-01
期刊：
影响因子：
24.2
通讯作者：
Hu, Liangbing
中科院分区：
文献类型：
--
作者：
Chen, Yanan;Wang, Yilin;Hu, Liangbing
高密度和高质量的石墨烯膜和制品的容易和可扩展的制造对于一系列电子和机械应用是非常有吸引力的。原始的、高质量的石墨烯具有其固有的不渗透性，这对制造具有高电导率的致密膜和厚部件提出了挑战，这是由于难以去除在各种制造方法中使用的滞留空气和/或溶剂。为了克服这一缺陷，在原始石墨烯（“多孔石墨烯”）中有意地产生平均直径约为15 nm的纳米孔。这些孔作为快速去除气体或液体的通道，并能够制造致密的多孔石墨烯纳米结构。随后，应用高温工艺以有效地修复纳米孔并恢复高质量的石墨烯共轭网络。通过纳米孔的产生和修复，产生了表现出2209 S/cm的热导率和863 W/mK的上级热导率的致密石墨烯制品。这种独特的加工方法使高质量石墨烯结构的制造变得容易和可扩展，这些结构可以很容易地集成到下一代电子电路和高功率电池系统中，以实现高效和轻量的热管理。
Facile and scalable fabrication of highly dense and high-quality graphene films and articles is extremely attractive for a range of electronic and mechanical applications. Pristine, high-quality graphene with its inherent impermeability poses challenges in fabricating dense films and thick parts with high electrical conductivity due to the difficulty in removing trapped air and/or solvents used in various fabrication methods. To overcome this deficiency, nano-holes were intentionally created in pristine graphene ("holey graphene") with an average diameter of approximately 15 nm. The holes serve as pathways for the rapid removal of gases or liquids and enable the fabrication of dense holey graphene nanostructures. Subsequently, a high-temperature process is applied to effectively repair the nano-holes and recover the high-quality graphene conjugated network. Through the creation and repair of the nano-holes, dense graphene articles that exhibited an ultrahigh conductivity of 2209 S/cm and superior thermal conductivity of 863 W/mK were created. This unique processing methodology enables the facile and scalable fabrication of high-quality graphene constructs, which can be easily integrated into the next generation of electronic circuits and high-power battery systems for highly efficient and lightweight thermal management.