de.mpg.escidoc.pubman.appbase.FacesBean
English
 
Help Guide Disclaimer Contact us Login
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Hierarchically aminated graphene honeycombs for electrochemical capacitive energy storage

MPS-Authors
http://pubman.mpdl.mpg.de/cone/persons/resource/persons32682

Chen,  Chenmeng
Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences;
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Science;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22292

Zhang,  Qiang
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22300

Zhao,  Xiao-Chen
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Shenyang National Laboratory for Materials Science Institute of Metal Research, Chinese Academy of Science;
Graduate University of the Chinese Academy of Sciences;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22288

Zhang,  Bing Sen
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22071

Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

http://pubman.mpdl.mpg.de/cone/persons/resource/persons22148

Su,  Dang Sheng
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;
Shenyang National Laboratory for Materials Science Institute of Metal Research, Chinese Academy of Science;

Locator
There are no locators available
Fulltext (public)

c2jm31426f.pdf
(Publisher version), 842KB

Supplementary Material (public)
There is no public supplementary material available
Citation

Chen, C., Zhang, Q., Zhao, X.-C., Zhang, B. S., Kong, Q.-Q., Yang, M.-G., et al. (2012). Hierarchically aminated graphene honeycombs for electrochemical capacitive energy storage. Journal of Materials Chemistry, 22(28), 14076-14084. doi:10.1039/c2jm31426f.


Cite as: http://hdl.handle.net/11858/00-001M-0000-000F-A97D-8
Abstract
Graphene with mediated surface properties and three-dimensional hierarchical architectures show unexpected performance in energy conversion and storage. To achieve advanced graphene electrode supercapacitors, manipulating the graphene building-blocks into hierarchical nanostructured carbon materials with large electrical double layer capacitance and pseudo-capacitance is a key issue. Here, it is shown that the hierarchically aminated graphitic honeycombs (AGHs) with large surface area for electrical double layer capacitance, tunable surface chemistry for pseudo-capacitance, mediated 3D macropores for ion buffering, and low-resistant pathways for ion diffusion are fabricated for electrochemical capacitive energy storage application through a facile high vacuum promoted thermal expansion and subsequent amination process. In the initial stage of amination (200 °C), NH3 reacts with carboxylic acid species to form mainly intermediate amides and amines through nucleophilic substitution. As the temperature increases, the intramolecular dehydration and decarbonylation will take place to generate thermally more stable heterocyclic aromatic moieties such as pyridine, pyrrole, and quaternary type N sites. The AGH exhibits a promising prospect in supercapacitor electrodes with high capacitance (e.g. maximum gravimetric capacitance 207 F g−1 and specific capacitance 0.84 F m−2 at a scan rate of 3 mV s−1) and extraordinary stability (e.g. 97.8% of capacitance retention after 3000 cycles, and 47.8% of capacitance maintaining at a high scan rate of 500 mV s−1 comparing with that at 3 mV s−1). This provides a novel structure platform for catalysis, separation, and drug delivery, which require fast mass transfer through mesopores, reactant reservoirs, and tunable surface chemistry.