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Facile Low-temperature Chemical Synthesis and Characterization of a Manganese Oxide/multi-walled Carbon Nanotube Composite for Supercapacitor Applications

Title
Facile Low-temperature Chemical Synthesis and Characterization of a Manganese Oxide/multi-walled Carbon Nanotube Composite for Supercapacitor Applications
Other Titles
multi-walled Carbon Nanotube Composite for Supercapacitor Applications
Author
안희준
Keywords
MN3O4 THIN-FILMS; ELECTROCHEMICAL CAPACITORS; HYDROTHERMAL SYNTHESIS; GRAPHENE SHEETS; NANORODS; ELECTRODES; DEPOSITION; OXIDE
Issue Date
2014-10
Publisher
KOREAN CHEMICAL SOC, 635-4 YEOGSAM-DONG, KANGNAM-GU, SEOUL 135-703, SOUTH KOREA
Citation
Bulletin of the Korean Chemical Society , 권: 35 , 호: 10 ,페이지: 2974-2978
Abstract
Mn3O4/multi-walled carbon nanotube (MWCNT) composites are prepared by chemically synthesizing Mn3O4 nanoparticles on a MWCNT film at room temperature. Structural and morphological characterization has been carried out using X-ray diffraction (XRD) and scanning and transmission electron microscopies (SEM and TEM). These reveal that polycrystalline Mn3O4 nanoparticles, with sizes of about 10-20 nm, aggregate to form larger nanoparticles (50-200 nm), and the Mn3O4 nanoparticles are attached inhomogeneously on MWCNTs. The electrochemical behavior of the composites is analyzed by cyclic voltammetry experiment. The Mn3O4/ MWCNT composite exhibits a specific capacitance of 257 Fg?1 at a scan rate of 5 mVs?1, which is about 3.5 times higher than that of the pure Mn3O4. Cycle-life tests show that the specific capacitance of the Mn3O4/ MWCNT composite is stable up to 1000 cycles with about 85% capacitance retention, which is better than the pure Mn3O4 electrode. The improved supercapacitive performance of the Mn3O4/MWCNT composite electrode can be attributed to the synergistic effects of the Mn3O4 nanoparticles and the MWCNTs, which arises not only from the combination of pseudocapacitance from Mn3O4 nanoparticles and electric double layer capacitance from the MWCNTs but also from the increased surface area, pore volume and conducting property of the MWCNT network.
URI
https://scholar.google.co.kr/scholar?q=Facile+Low-temperature+Chemical+Synthesis+and+Characterization+of+a+Manganese+Oxide%2fmulti-walled+Carbon+Nanotube+Composite+for+Supercapacitor+Applications&hl=ko&as_sdt=0&as_vis=1&oi=scholart&sa=X&ved=0ahUKEwi7yrDdotnYAhXDi5QKHTWaDQEQgQMIIzAAhttp://hdl.handle.net/20.500.11754/51134
ISSN
0253-2964; 1229-5949
DOI
10.5012/bkcs.2014.35.10.2974
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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