Graphene, a 2-D monolayer of fused sp2 carbon bonds in a honeycomb-like network, has attracted a great deal of scientific interest due to its outstanding mechanical, electrical, thermal, and optical properties and theoretically high surface area of ∼2600 m2/g, Graphene sheets with exceptional electrical, mechanical, and optical properties have been widely utilized to prepare various hybrid electrode materials. However, the lack of an eco-friendly approach for large-scale, low-cost, and efficient preparation of high-quality graphene products has been a major bottleneck to exploit most potential applications. We hereby present our progress in scalable graphene preparation techniques, including a green and low-cost graphene preparation approach, graphene product engineering with different layers, different lateral sizes, and even with different functional groups. A highly efficient route within 10 minutes reduction time to produce high-quality graphene was developed and the graphene products can be readily dispersed in either polar or nonpolar solvents for subsequent applications. These different graphene products are applied based on specific requirements of different application fields, such as composite materials, conductive paints, coatings, paint/ink, transparent conductive layers, energy storage, and biomedical applications. The incorporation of graphene sheets in lithium ion batteries can facilitate electron transport and Li+ diffusion in anchored host materials, thus enhancing electrochemical lithium storage. We have developed different simple self-assembly method to generate multidimensional composites of metals and metal oxides nano-, or micron material and graphene sheets, such as Si, TiO2, Fe3O4,and analyzed these composites in terms of the relationship between their unique structural features and the electrochemical performance. As evidenced by the electrochemical test results, these hybrid composite structure not only can effectively suppress the aggregation of composite electrode material, but also improve the electrical conductivity of composite structure, and exhibit a better performance in a lithium ion battery than other samples in our work.

Synthesis and assembly of ordered nanocomposite anode materials using graphene

256th National Meeting (2018)

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