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Mass production of graphene nanoscrolls and their application in high rate performance supercapacito

The output of graphene nanoscrolls (GNSs) has been greatly enhanced to the gram-level by using an improved spray-freeze-drying method without damaging the high transforming efficiency (>92%). The lowest bulk density of GNS foam reaches 0.10 mg cm−3 . Due to the unique morphology and high specific surface area (386.4 m2 g−1 ), the specific capacitances of the GNSs (90–100 F g−1 at 1 A g−1 ) are all superior to those of multiwalled carbon nanotubes meanwhile maintaining excellent rate capabilities (60–80% retention at 50 A g−1 ). For the first time, all-graphene-based films (AGFs) are fabricated via the intercalation of GNSs into graphene layers. The AGF exhibits a capacitance of 166.8 F g−1 at 1 A g−1 and rate capability (83.9% retention at 50 A g−1 ) better than those of pure reduced graphene oxide (RGO) films and carbon nanotubes/graphene hybrid films (CGFs).

文章链接:http://polymer.zju.edu.cn/gc/uploadfile/2017/0209/20170209112436197.pdf

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