Journal
RSC ADVANCES
Volume 3, Issue 8, Pages 2566-2571Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ra22685e
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Funding
- National Science Foundation of China [51077014, 21003028, 51202043]
- Fundamental Research funds for the Central Universities
- Program for New Century Excellent Talents in University [NCET-10-0050]
- Excellent Youth Foundation of Heilongjiang Province of China [JC201210]
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Highly crumpled graphene sheets (HCGSs) have been prepared by a facile and rapid route through freezing a chemically reduced graphene oxide aqueous suspension with liquid nitrogen. The porous and highly crumpled graphene structure with a large surface area and pore volume facilitates fast ionic transport within the electrode while preserving excellent electrical conductivity and thus endows HCGSs with excellent electrochemical properties. As the electrodes for supercapacitors, the HCGSs exhibit high specific capacitance (259 F g(-1)), excellent rate capability and cycling stability (93% retention after 5000 cycles).
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