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K14.03 - Mass Production of Two-Dimensional Crystals as Materials for Energy Conversion and Storage 
December 3, 2014   4:15pm - 4:45pm

Large-scale production of low-cost, highly-stable, metal-free two-dimensional (2D) crystals now become an important challenge for many applications including energy conversion and storage. Here, we demonstrate an efficient and eco-friendly method for the scalable synthesis of 2D crystals and their applications for energy conversion and storage. The first approach involves edge-selective functionalization of graphite into graphene nanoplatelets (GnPs) by a simple mechanochemical ball-milling process [1]. The approach is an important step toward high-yield exfoliation of three-dimensional graphite into two-dimensional crystals with minimal basal plane distortion. The second approach is scalable synthesis of 2D crystals with periodic holes and heteroatoms via polycondensation between A3 and B- monomers. The resultant 2D crystals displayed outstanding electrochemical performance [2]. Our findings suggest that the 2D crystals can be simply prepared and conveniently used as base materials for a wide range of applications from wet chemistry to device applications [3].


[1] (a) Choi, et al., Chem. Commun. 46, 6320-6322 (2010); (b) Bae, et al., ACS Nano 5, 4974-4978 (2011); (c) Jeon, et al., Proc. Nat-l Acad. Sci., USA, 109, 5588-5593 (2012); (d) Jeon, et al., Adv. Mater. 25, 6238 (2013).
[2] (a) Jeon, et al., J. Am. Chem. Soc. 135, 1386-1393 (2013); (b) Jeon, et al., Sci. Rept. 3, 2260 (2013); (c) Jeon, et al., Sci. Rept. 3, 1810 (2013); (d) Chang, et al., J. Am. Chem. Soc. 135, 8981-8988 (2013).
[3] (a) Ju, et al., Energy & Environ. Sci. 7, 1044-1052 (2014); (c) Ju, et al., Adv. Mater. Online ASAP (2014); (d) Kim, et al., ACS Nano 8, 2820-2825 (2014); (e) Jung, et al, Angew. Chem. Int�l. Ed. 126, 2430-2433 (2014).

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