Ultra-thin and ultra-long α-MnO2 nanowires for pseudocapacitor material

Single phase, ultra-thin, and ultra-long α-MnO 2 nanowires were synthesized by facile method and investigated as an electrochemical pseudocapacitor active material. Structural characterizations reveal that the α-MnO 2 has a narrow size distribution of ˂5 nm and around 20–30 μm in length. A maximum s...

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Bibliographic Details
Published inJournal of solid state electrochemistry Vol. 21; no. 11; pp. 3215 - 3220
Main Authors Singu, Bal Sydulu, Hong, Sang Eun, Yoon, Kuk Ro
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2017
Springer Nature B.V
Subjects
Analytical Chemistry
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Electrochemical analysis
Electrochemistry
Energy Storage
Manganese oxides
Nanowires
Original Paper
Physical Chemistry
Size distribution
Supercapacitor
Nanowires
Impedance
Crystalline
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Summary:Single phase, ultra-thin, and ultra-long α-MnO 2 nanowires were synthesized by facile method and investigated as an electrochemical pseudocapacitor active material. Structural characterizations reveal that the α-MnO 2 has a narrow size distribution of ˂5 nm and around 20–30 μm in length. A maximum specific capacitance of 495 F g −1 can be achieved at a scan rate of 2 mV s −1 by cyclic voltametrically. The α-MnO 2 nanowires exhibit excellent electrochemical performance at various current densities and good cycling ability. These results indicate that the α-MnO 2 nanowires are a promising candidate for the supercapacitor electrode active material.
ISSN:1432-8488
1433-0768
DOI:10.1007/s10008-017-3661-9