Scalable thermal synthesis of a highly crumpled, highly exfoliated and N-doped graphene/Mn-oxide nanoparticle hybrid for high-performance supercapacitors

Cited 3 time in webofscience Cited 0 time in scopus
  • Hit : 202
  • Download : 0
A scalable thermal method to synthesize a highly crumpled, highly exfoliated and N-doped graphene/Mn-oxide nanoparticle hybrid for high performance supercapacitors has been demonstrated. Reduction of graphene-oxide (GO), nanometer scale crumpling, high level of exfoliation, N-doping of graphene and decoration with Mn-oxide nanoparticles, each of which significantly contributes to a high specific capacitance (958 F g(-1) at 5 mV s(-1)) in a synergetic way, are achieved in a single thermal process, thermal annealing of GO-Gly-Mn(NO3)(2)center dot 4H(2)O mixture at 500 degrees C followed by a rapid quenching with liquid nitrogen. N-doping of graphene is predominantly done in the form of pyrrolic-like and pyridine-like nitrogens, and Mn-oxide nanoparticles are formed on the surface of graphene as MnO2 and Mn3O4. The nanometer scale crumpling of graphene sheets, which is achieved by rapid quenching of graphene in the presence of Mn-oxide nanoparticles on its surface, induces an exceptionally high degree of exfoliation of graphenes and prevents restacking of graphene sheets during a repeated charge-discharge process, providing a high specific surface area (1006 m(2) g(-1)) and high cycle stability (94.1% retention after 1000 cycles), respectively. The simplicity of the synthesis process and the high performance of supercapacitors make it an easily scalable and industrially applicable method.
Publisher
ROYAL SOC CHEMISTRY
Issue Date
2015-05
Language
English
Article Type
Article
Keywords

CAPACITIVE ENERGY-STORAGE; ELECTROCHEMICAL CAPACITORS; ACTIVATED CARBON; GRAPHITE OXIDE; X-RAY; ELECTRODES; DENSITY; MNO2; ULTRACAPACITORS; FRAMEWORKS

Citation

RSC ADVANCES, v.5, no.53, pp.42516 - 42525

ISSN
2046-2069
DOI
10.1039/c5ra04163e
URI
http://hdl.handle.net/10203/199117
Appears in Collection
NE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 3 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0