e-journal

High supercapacitive performance of sol–gel ZnO-doped manganese oxide coatings

---

Abstract.
In the present study, ZnO-doped manganese (Mn) oxide coatings were prepared as a function of ZnO content
(≤40 at.%) by sol–gel process. After post heat treatment at 300 °C, the influences of ZnO on the microstructural characteristics and pseudocapacitive performance of the Mn-oxide films were investigated. The structural analyses identified the sol–gel ZnO-doped Mn-oxide powder as a tetragonal Mn3O4 phase with a
nanocrystalline structure. The formation of ZnxMn3−xO4 spinel occurred when ZnO content was ≥20 at.%.
The crystallite size of Mn-oxide powder increased when a small amount of ZnO was added, and then decreased
when larger amounts were added. The cyclic voltammetry (CV) data showed that the specific capacitance
(SC) of the Mn-oxide film in 1 M Na2SO4 electrolyte can be increased from 236 F/g to 301 F/g at
25 mV/s by doping with 10 at.% ZnO. The formation of spinel tended to inhibit the SC value of the films.
After activation of the Mn-oxide film, however, a relatively high cycling efficiency of >85% was obtained
for all compositions after 1200 CV cycles.

Keywords:
Zinc oxide
Manganese oxide
Sol–gel
Cyclic voltammetry
Supercapacitor

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

Thin Solid Films

No. Panggil

-

Penerbit

New York : Elsevier B.V.., 2013

Deskripsi Fisik

Thin Solid Films 528 (2013) 61–66

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

528 (2013)

Subjek

PSEUDOKAPASITOR

Info Detail Spesifik

-

Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar