e-journal

Effects of pore diameters on the pseudocapacitive property of three-dimensionally ordered macroporous manganese oxide electrodes

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Abstract.
MnO2 nanoparticles (NPs) with 1.8±0.2 nm in diameter were successfully produced using an ethylene glycolassisted synthesis with successive hydrolysis and condensation reactions. The tiny NPs were used as precursors for producing three-dimensionally ordered macroporous (3DOM) electrodes using a colloidal crystal-templating method. The specific capacitances of 3DOM MnO2 electrodes depend on their pore diameters. The 3DOM electrode with about 200-nm pore diameter provides 3.0-, 2.0-, and1.3-fold higher specific capacitance than the dense film and the 3DOM electrodes with larger pores, 400 nm and 900 nm, respectively. The ultrahigh specific capacitance of the 200-nm 3DOMelectrode is 765 F g−1 measured in 0.5 MNa2SO4 at the scan rate of 2 mV s−1. In addition, the capacity retention of the 200-nm 3DOM electrode is over 98% of the original capacitance after 2000 cycles while that of the dense film is only 78%.

Keywords:
Pseudocapacitor
Manganese oxide
Polystyrene
Colloidal template
Supercapacitor

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Ketersediaan

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Informasi Detail

Judul Seri

Materials Letters

No. Panggil

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Penerbit

New York : Elsevier B.V.., 2012

Deskripsi Fisik

Materials Letters 68 (2012) 230–233

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

68 (2012)

Subjek

PSEUDOKAPASITOR

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

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