Synthesis of Fe3O4/C composite as electrochemical capacitor in aqueous electrolytes

V. M. Pratiwi, R. N. Ratfiandini, D. A. Wangling, Mahmudi, H. Setyawan*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)


The objective of this work is to investigate Fe3O4/C composite as an electrochemical capacitor. Fe3O4 nanoparticles were synthesized by oxidation of iron in water using either constant direct current (CDC) or pulse direct current (PDC). Fe 3O4/C composite was prepared by two methods: (1) the nanoparticles were mixed with sucrose and carbonized at 500 °C under the mixture of 5% H2 in N2, and (2) the nanoparticles were mixed with carbon black. The electrochemical performance of the composite was evaluated by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The diameters of Fe3O4 particles obtained using CDC and PDC methods were approximately 18.7 nm and 20 nm, respectively. The specific surface area of composite with method (1) using PDC was 112.93 m 2/g and using CDC was 111.58 m2/g, and method (2) using PDC was approximately 48.345 m2/g and using CDC was 40.77 m 2/g. EIS analysis showed that the conductivity of the composite prepared by method (1) using CDC lower than that using PDC and method (2) gave the same result. The lower specific surface area gave better conductivity. Cyclic voltammetry analysis for some cycles showed that the area under the anodic-cathodic curve for the both methods (1) and (2) using PDC or CDC did not give the good result and for method (2) gave the same area. This is affected by diameter particles of composite.

Original languageEnglish
Title of host publication5th Nanoscience and Nanotechnology Symposium, NNS 2013
PublisherAmerican Institute of Physics Inc.
Number of pages5
ISBN (Print)9780735412187
Publication statusPublished - 2014
Event5th Nanoscience and Nanotechnology Symposium, NNS 2013 - Surabaya, Indonesia
Duration: 23 Oct 201325 Oct 2013

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference5th Nanoscience and Nanotechnology Symposium, NNS 2013


  • Electrode materials
  • Electrosynthesis
  • Rechargable batteries


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