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Three-dimensionally hierarchical porous carbon creating high-performance electrochemical capacitors

Journal Article


Abstract


  • Three-dimensionally (3D) hierarchical porous carbon has been prepared through a simple and efficient hydrothermal treatment on colloidal silica as template. Nitrogen adsorption-desorption isotherms and transmission electron microscope images reveal that the porous carbon has a unique 3D interconnected micro-, meso- and macroporous network. The observed 3D interconnected meso/macroporous network originates from the cores of carbon hollow-spheres and the aggregation of crosslinked carbon hollow-spheres, and the micropores exist from the 3D interconnected network inside the shells of carbon hollow-spheres. The electrochemical capacitive tests indicate that the porous carbons exhibit large specific capacitance of about 300 F g-1 at 1 A g-1 in 6 M KOH aqueous electrolyte as well as high capacitance retention of 71% when the current density increased by 10 times. �� 2014 Elsevier Ltd.

Publication Date


  • 2014

Citation


  • Han, Y., Liu, S., Li, D., & Li, X. (2014). Three-dimensionally hierarchical porous carbon creating high-performance electrochemical capacitors. Electrochimica Acta, 138, 193-199. doi:10.1016/j.electacta.2014.06.107

Scopus Eid


  • 2-s2.0-84904357060

Web Of Science Accession Number


Start Page


  • 193

End Page


  • 199

Volume


  • 138

Issue


Place Of Publication


Abstract


  • Three-dimensionally (3D) hierarchical porous carbon has been prepared through a simple and efficient hydrothermal treatment on colloidal silica as template. Nitrogen adsorption-desorption isotherms and transmission electron microscope images reveal that the porous carbon has a unique 3D interconnected micro-, meso- and macroporous network. The observed 3D interconnected meso/macroporous network originates from the cores of carbon hollow-spheres and the aggregation of crosslinked carbon hollow-spheres, and the micropores exist from the 3D interconnected network inside the shells of carbon hollow-spheres. The electrochemical capacitive tests indicate that the porous carbons exhibit large specific capacitance of about 300 F g-1 at 1 A g-1 in 6 M KOH aqueous electrolyte as well as high capacitance retention of 71% when the current density increased by 10 times. �� 2014 Elsevier Ltd.

Publication Date


  • 2014

Citation


  • Han, Y., Liu, S., Li, D., & Li, X. (2014). Three-dimensionally hierarchical porous carbon creating high-performance electrochemical capacitors. Electrochimica Acta, 138, 193-199. doi:10.1016/j.electacta.2014.06.107

Scopus Eid


  • 2-s2.0-84904357060

Web Of Science Accession Number


Start Page


  • 193

End Page


  • 199

Volume


  • 138

Issue


Place Of Publication