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Improved Electrochemical Performance of Fe 3 O 4 Nanoparticles Decorated Activated Carbon Supercapacitor Electrodes
Author(s) -
Park Seungil,
Raj Chellan Justin,
Manikandan Ramu,
Kim Byung Chul,
Yu Kook Hyun
Publication year - 2020
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.12078
Subject(s) - pseudocapacitance , supercapacitor , materials science , electrochemistry , activated carbon , capacitance , electrode , oxide , aqueous solution , surface modification , chemical engineering , specific surface area , dispersion (optics) , nanoparticle , nanotechnology , chemistry , catalysis , metallurgy , organic chemistry , physics , adsorption , optics , engineering
Metal oxide decorated activated carbon (AC) composites exhibit excellent electrochemical property and which is potential for energy storage and catalytic applications. Here, we report the synthesis of iron oxide (Fe 3 O 4 ) anchored AC composite for supercapacitor (SC) electrode. The citrate‐stabilized Fe 3 O 4 aqueous dispersion (5 mg/mL) of various concentration was utilized for the functionalization of commercial AC and the sample prepared using 50 mL Fe 3 O 4 aqueous dispersion in 2 g of AC (AC‐50Fe) displayed better surface morphology with comparable surface area and porosity. Moreover, the sample AC‐50Fe showed excellent electrochemical performance with a maximum specific capacitance value 131 Fg −1 and cyclic stability ∼105% after 10 000 charge/discharge cycles, which is much higher than the bare AC (77 Fg −1 ) and AC‐25Fe (91 Fg −1 ) electrodes. Thus, the optimum amount of Fe 3 O 4 in AC can effectively enhance the SC performance of the electrode by supplying additional pseudocapacitance along with the electric double‐layer capacitance of AC.