Remarkable capacity retention of nanostructured manganese oxide upon cycling as an electrode material for supercapacitor

P. Ragupathy, Dae Hoon Park, Guy Campet, H. N. Vasan, Seong Ju Hwang, Jin Ho Choy, N. Munichandraiah

Research output: Contribution to journalArticle

210 Citations (Scopus)

Abstract

Electrochemical capacity retention of nearly X-ray amorphous nanostructured manganese oxide (nanoMnO2) synthesized by mixing directly KMnO 4 with ethylene glycol under ambient conditions for supercapacitor studies is enhanced significantly. Although X-ray diffraction (XRD) pattern of nanoMnO2 shows poor crystallinity, it is found that by Mn K-edge X-ray absorption near edge structure (XANES) measurement that the nanoMnO 2 obtained is locally arranged in a δ-MnO2-type layered structure composed of edge-shared network of MnO6 octahedra. Field emission scanning electron microscopy and XANES measurements show that nanoMnO2 contains nearly spherical shaped morphology with δ-MnO2 structure, and 1D nanorods of α-MnO 2type structure (powder XRD) in the annealed (600 d̀C) sample. Volumetric nitrogen adsorption - desorption isotherms, inductively coupled plasma analysis, and thermal analysis are carried out to obtain physicochemical properties such as surface area (230 m2 g-l), porosity of nanoMnO2 (secondary mesopores of diameter 14.5 nm), water content, composition, etc., which lead to the promising electrochemical properties as an electrode for supercapacitor. The nanoMnO2 shows a very high stability even after 1200 cycles with capacity retention of about 250 F g -1.

Original languageEnglish
Pages (from-to)6303-6309
Number of pages7
JournalJournal of Physical Chemistry C
Volume113
Issue number15
DOIs
Publication statusPublished - 2009 Apr 16

Fingerprint

Manganese oxide
manganese oxides
electrochemical capacitors
electrode materials
X ray absorption
cycles
Electrodes
x rays
Ethylene Glycol
Inductively coupled plasma
Ethylene glycol
Nanorods
Electrochemical properties
Field emission
X ray powder diffraction
Thermoanalysis
Diffraction patterns
Water content
Isotherms
Desorption

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Ragupathy, P. ; Park, Dae Hoon ; Campet, Guy ; Vasan, H. N. ; Hwang, Seong Ju ; Choy, Jin Ho ; Munichandraiah, N. / Remarkable capacity retention of nanostructured manganese oxide upon cycling as an electrode material for supercapacitor. In: Journal of Physical Chemistry C. 2009 ; Vol. 113, No. 15. pp. 6303-6309.
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Remarkable capacity retention of nanostructured manganese oxide upon cycling as an electrode material for supercapacitor. / Ragupathy, P.; Park, Dae Hoon; Campet, Guy; Vasan, H. N.; Hwang, Seong Ju; Choy, Jin Ho; Munichandraiah, N.

In: Journal of Physical Chemistry C, Vol. 113, No. 15, 16.04.2009, p. 6303-6309.

Research output: Contribution to journalArticle

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T1 - Remarkable capacity retention of nanostructured manganese oxide upon cycling as an electrode material for supercapacitor

AU - Ragupathy, P.

AU - Park, Dae Hoon

AU - Campet, Guy

AU - Vasan, H. N.

AU - Hwang, Seong Ju

AU - Choy, Jin Ho

AU - Munichandraiah, N.

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N2 - Electrochemical capacity retention of nearly X-ray amorphous nanostructured manganese oxide (nanoMnO2) synthesized by mixing directly KMnO 4 with ethylene glycol under ambient conditions for supercapacitor studies is enhanced significantly. Although X-ray diffraction (XRD) pattern of nanoMnO2 shows poor crystallinity, it is found that by Mn K-edge X-ray absorption near edge structure (XANES) measurement that the nanoMnO 2 obtained is locally arranged in a δ-MnO2-type layered structure composed of edge-shared network of MnO6 octahedra. Field emission scanning electron microscopy and XANES measurements show that nanoMnO2 contains nearly spherical shaped morphology with δ-MnO2 structure, and 1D nanorods of α-MnO 2type structure (powder XRD) in the annealed (600 d̀C) sample. Volumetric nitrogen adsorption - desorption isotherms, inductively coupled plasma analysis, and thermal analysis are carried out to obtain physicochemical properties such as surface area (230 m2 g-l), porosity of nanoMnO2 (secondary mesopores of diameter 14.5 nm), water content, composition, etc., which lead to the promising electrochemical properties as an electrode for supercapacitor. The nanoMnO2 shows a very high stability even after 1200 cycles with capacity retention of about 250 F g -1.

AB - Electrochemical capacity retention of nearly X-ray amorphous nanostructured manganese oxide (nanoMnO2) synthesized by mixing directly KMnO 4 with ethylene glycol under ambient conditions for supercapacitor studies is enhanced significantly. Although X-ray diffraction (XRD) pattern of nanoMnO2 shows poor crystallinity, it is found that by Mn K-edge X-ray absorption near edge structure (XANES) measurement that the nanoMnO 2 obtained is locally arranged in a δ-MnO2-type layered structure composed of edge-shared network of MnO6 octahedra. Field emission scanning electron microscopy and XANES measurements show that nanoMnO2 contains nearly spherical shaped morphology with δ-MnO2 structure, and 1D nanorods of α-MnO 2type structure (powder XRD) in the annealed (600 d̀C) sample. Volumetric nitrogen adsorption - desorption isotherms, inductively coupled plasma analysis, and thermal analysis are carried out to obtain physicochemical properties such as surface area (230 m2 g-l), porosity of nanoMnO2 (secondary mesopores of diameter 14.5 nm), water content, composition, etc., which lead to the promising electrochemical properties as an electrode for supercapacitor. The nanoMnO2 shows a very high stability even after 1200 cycles with capacity retention of about 250 F g -1.

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