期刊
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
卷 41, 期 8, 页码 856-863出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/bkcs.12078
关键词
Iron oxide; Activated carbon; Supercapacitor; Pseudocapacitance
资金
- National Research Foundation of Korea - Ministry of Science, ICT and Future [NRF-2015M3D1A1069710]
- National Research Foundation of Korea - Ministry of Education, Republic of Korea [NRF-2014R1A6A1030419]
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 (Fe3O4) 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 similar to 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.
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