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Chrysanthemum like carbon nanofiber foam architectures for supercapacitors

  • Wei Wang (a1), Shirui Guo (a2), Mihrimah Ozkan (a3) and Cengiz S. Ozkan (a4)

Abstract

Three-dimensional (3D) chrysanthemum-like carbon nanofiber (CCNF) foam architectures were synthesized on highly porous nickel foam via a one-step ambient pressure chemical vapor deposition process by introducing a mixture of precursor gases (H2 and C2H2). The as-synthesized 3D foam architectures were characterized by scanning electron microscopy and transmission electron microscopy, which demonstrate high porosity and a densely packed nature of the hierarchical carbon nanostructures. Symmetrical electrochemical double-layer capacitors were fabricated using electrodes based on the CCNF foam architectures. Cyclic voltammetry, charge–discharge measurements, and electrochemical impedance spectroscopy were conducted to determine the performance metrics. The supercapacitors (SCs) demonstrate a high areal capacitance of 1.37 F/cm2 (gravimetric specific capacitance: 23.83 F/g), which leads to superior values for per area energy density (0.19 Wh/cm2) and power density (141.77 W/cm2). In addition, capacitance retention of ∼100% over 13,000 charge–discharge cycles demonstrates the high electrochemical stability of this type of carbon nanostructure foam for high areal capacitance SCs.

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a)Address all correspondence to these authors. e-mail: mihri@ee.ucr.edu

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Chrysanthemum like carbon nanofiber foam architectures for supercapacitors

  • Wei Wang (a1), Shirui Guo (a2), Mihrimah Ozkan (a3) and Cengiz S. Ozkan (a4)

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