e-journal

Preparation and capacitance behavior of manganese oxide hollow structures with different morphologies via template-engaged redox etching

---

Abstract.
A variety of amorphous manganese oxide electrode materials with uniform nonspherical hollow interiors
are prepared via sacrificial template-engaged redox etching of the corresponding shape-controlled Cu2O
nanocrystals in KMnO4 aqueous solution at room temperature. The obtained materials are characterized by
X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron
microscopy and N2 adsorptionedesorption. The amorphous manganese oxide hollow materials not only
well inherit the size and shape of Cu2O nonspherical precursor, but also show a manganese average
oxidation state of 3.7 and large specific surface area (about 198 m2 g-1). The electrochemical measurements
show that the capacitance of the as-prepared amorphous manganese oxide electrode materials with
uniform nonspherical hollow interiors is connects with their specific surface area. The amorphous manganese
oxide star hollow architecture exhibits not only high specific capacitance of 366 F g-1 at a scan rate
of 5 mV s-1, but also relatively good cycle stability (93.1% capacitance retention after 1000 cycles at a scan
rate of 20 mV s-1), which make it have a potential application as a supercapacitor electrode material.

Keywords: Cu2O sacrificial templates; Redox etching; MnO2 hollow structure; Capacitance

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

Journal of Power Sources

No. Panggil

-

Penerbit

New York : Elsevier B.V.., 2013

Deskripsi Fisik

Journal of Power Sources 239 (2013) 347-355

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

239 (2013)

Subjek

KAPASITOR ELEKTROKIMIA

Info Detail Spesifik

-

Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar