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很有意思的3D孔状石墨烯泡沫 已有12人参与
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中科院金属研究所沈阳材料科学国家实验室发表在NATURE MATERIALS上，利用模版化学蒸汽法合成的很有意思的3D孔状石墨烯泡沫， Integration of individual two-dimensional graphene sheets1–3 into macroscopic structures is essential for the application of graphene. A series of graphene-based composites4–6and macroscopicstructures7–11havebeenrecentlyfabricatedusing chemically derived graphene sheets. However, these composites and structures suffer from poor electrical conductivity because of the low quality and/or high inter-sheet junction contactresistance of the chemically derived graphene sheets. Here we report the direct synthesis of three-dimensional foam-like graphene macrostructures, which we call graphene foams (GFs), by template-directed chemical vapour deposition. A GF consists of an interconnected flexible network of graphene as the fast transport channel of charge carriers for high electrical conductivity. Even with a GF loading as low as 0:5wt%, GF/poly(dimethyl siloxane) composites show a very high electrical conductivity of 10Scm, which is 6 orders of magnitude higher than chemically derived graphene based composites. Using this unique network structureandtheoutstandingelectricalandmechanicalproperties of GFs, as an example, we demonstrate the great potential of GF/pol(dimethylsiloxane) composites for flexible, foldableand stretchable conductors.  1.jpg  2.jpg另外随便附带上他们利用这个做的柔性LiFePO4电池。 There is growing interest in thin, lightweight, and flexible energy storage devices to meet the special needs for next-generation, high-performance, flexible electronics. Here we report a thin,lightweight, and flexible lithium ion battery made from graphene foam, a three-dimensional,flexible, and conductive interconnected network, as a current collector, loaded with Li4Ti5O12and LiFePO4,for use as anode and cathode, respectively. No metal current collectors, conducting additives, or binders are used. The excellent electrical conductivity and pore structure of the hybrid electrodes enable rapid electron and ion transport. For example, the Li4Ti5O12/graphene foam electrode shows a high rate up to 200 C, equivalent to a full discharge in 18 s. Using them, we demonstrate a thin, lightweight, and flexible full lithium ion battery with a high-rate performance and energy density that can be repeatedly bent to a radius of 5 mm without structural failure and performance loss.  3.jpg [ Last edited by Tony-Yang on 2013-1-16 at 13:39 ] |
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Mr.zhu2楼
2013-01-14 10:37
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五星好评 顶一下，感谢分享！
2013-01-14 10:42
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五星好评 顶一下，感谢分享！
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好 [ 发自手机版 http://muchong.com/3g ]
