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Issue 3, 2016
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Mass production of graphene nanoscrolls and their application in high rate performance supercapacitors

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Abstract

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).

Graphical abstract: Mass production of graphene nanoscrolls and their application in high rate performance supercapacitors

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Supplementary files

Article information


Submitted
13 Oct 2015
Accepted
24 Nov 2015
First published
26 Nov 2015

Nanoscale, 2016,8, 1413-1420
Article type
Paper
Author version available

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

B. Zheng, Z. Xu and C. Gao, Nanoscale, 2016, 8, 1413
DOI: 10.1039/C5NR07067H

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