Nanofabrication of Three-Dimensional Graphene with Controlled Shape

形状可控的三维石墨烯的纳米加工

• 批准号: 1661699
• 负责人: Yun Hu
• 金额: $ 36.71万
• 依托单位: Michigan Technological University
• 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: 2017-06-01 至 2021-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1661699&HistoricalAwards=false
• 关键词: Nanofabrication; Three; Dimensional; Graphene; Controlled

Graphene is a very promising material for many applications. The current mass production of graphene is focused on two-dimensional graphene sheets. However, the attractive forces between graphene sheets can cause two-dimensional graphene to restack into graphite-like powders, decreasing their specific surface area and deteriorating graphene's unique properties. Three-dimensional graphene, which is a graphene sheet that possesses a curved non-planar shape can inhibit the restacking. This award advances knowledge in scalable nano-scale processing of three-dimensional shape-controlled graphene. In this process, three-dimensional graphene sheets are produced from the exothermic reaction of carbon monoxide and alkali metal oxides, followed by an acid treatment. The three-dimensional graphene are explored as materials for energy devices. Project plans are to have a strong impact on education and outreach by inspiring to engage Native American students in science and engineering. Graduate and undergraduate students involved in this project receive advanced training, which will build a firm foundation for their future careers.Current techniques for three-dimensional (3D) graphene synthesis are limited by the difficulty of controlling graphene shapes and the requirement for high energy need. To overcome these limits, a scalable process is investigated based on a previously invented method involving a reaction between CO and alkali metal oxides. In this approach, graphene sheets are formed simultaneously with alkali metal carbonate nano-particles. Consequently, the generated carbonate nano-particles do not only play a role in determining the locally curved shape of the 3D graphene sheets, but also isolate the graphene sheets from each other to prevent graphite formation during synthesis. After removing the carbonate nano-particles with acid, 3D shape-controlled graphene sheets are obtained. The specific aims of this research are to synthesize various controlled shapes, understand the kinetics of reactions for 3D graphene production, evaluate structure-property relationships, and explore the 3D graphene sheets as electrode materials for solar cells, ion batteries, and supercapacitors. This research advances a new concept in the synthesis of 3D graphene. It involves the understanding of fundamental chemistry, physics, and material science at nanoscale. Furthermore, the resulting kinetic relationships provide a scientific and engineering basis to scale-up the manufacturing process for commercialization.

石墨烯是一种非常有前途的材料，具有许多应用。目前石墨烯的大规模生产集中在二维石墨烯片上。然而，石墨烯片之间的吸引力会导致二维石墨烯重新堆叠成石墨状粉末，降低其比表面积并使石墨烯的独特性质恶化。三维石墨烯是具有弯曲的非平面形状的石墨烯片，其可以抑制重新堆叠。该奖项推进了三维形状控制石墨烯的可扩展纳米级加工的知识。在这个过程中，三维石墨烯片由一氧化碳和碱金属氧化物的放热反应产生，然后进行酸处理。三维石墨烯作为能源器件的材料进行了探索。项目计划将通过激励美洲土著学生参与科学和工程，对教育和外联产生重大影响。参与该项目的研究生和本科生将接受高级培训，这将为他们未来的职业生涯奠定坚实的基础。目前的三维（3D）石墨烯合成技术受到石墨烯形状难以控制和高能量需求的限制。为了克服这些限制，基于先前发明的涉及CO和碱金属氧化物之间的反应的方法研究了可扩展的方法。在这种方法中，石墨烯片与碱金属碳酸盐纳米颗粒同时形成。因此，生成的碳酸盐纳米颗粒不仅在确定3D石墨烯片的局部弯曲形状中起作用，而且还将石墨烯片彼此隔离以防止合成期间的石墨形成。在用酸去除碳酸盐纳米颗粒之后，获得3D形状控制的石墨烯片。本研究的具体目标是合成各种受控形状，了解3D石墨烯生产的反应动力学，评估结构-性能关系，并探索3D石墨烯片作为太阳能电池，离子电池和超级电容器的电极材料。该研究为三维石墨烯的合成提供了新的思路。它涉及对纳米级基础化学，物理学和材料科学的理解。此外，所得到的动力学关系提供了科学和工程基础，以扩大商业化的制造工艺。

项目成果

Design and Synthesis of 3D Potassium-Ion Pre-Intercalated Graphene for Supercapacitors

• DOI: 10.1021/acs.iecr.7b05413
• 发表时间: 2018-02
• 期刊: Industrial & Engineering Chemistry Research
• 影响因子: 4.2
• 作者: Liang Chang;D. Stacchiola;Y. Hu

A thermo-photo hybrid process for steam reforming of methane: highly efficient visible light photocatalysis

• DOI: 10.1039/c9cc04193a
• 发表时间: 2019-07-11
• 期刊: CHEMICAL COMMUNICATIONS
• 影响因子: 4.9
• 作者: Han, Bing;Wei, Wei;Hu, Yun Hang
• 通讯作者: Hu, Yun Hang

Cyclo[18]carbon as an ultra-elastic molecular O-ring with unique mechanical properties

• DOI: 10.1016/j.carbon.2020.08.082
• 发表时间: 2021-01-01
• 期刊: CARBON
• 影响因子: 10.9
• 作者: Fang, Siyuan;Hu, Yun Hang
• 通讯作者: Hu, Yun Hang

Applications of 3D Potassium-Ion Pre-Intercalated Graphene for Perovskite and Dye-Sensitized Solar Cells

• DOI: 10.1021/acs.iecr.9b00795
• 发表时间: 2019-05
• 期刊: Industrial & Engineering Chemistry Research
• 影响因子: 4.2
• 作者: Wei Wei-Wei;Meijia Li;Y. Hu

Creating and Seeing the First Pure Carbon Ring

创造并见证第一个纯碳戒指

• DOI: 10.1016/j.matt.2019.09.018
• 发表时间: 2019
• 期刊: Matter
• 影响因子: 18.9
• 作者: Fang, Siyuan;Hu, Yun Hang
• 通讯作者: Hu, Yun Hang