Synthesis, characterization and capacitive performance of hydrous manganese dioxide nanostructures

Zhang, Jintao, Chu, Wei, Jiang, Jianwen and Zhao, X. S. (2011) Synthesis, characterization and capacitive performance of hydrous manganese dioxide nanostructures. Nanotechnology, 22 12: 1-9. doi:10.1088/0957-4484/22/12/125703


Author Zhang, Jintao
Chu, Wei
Jiang, Jianwen
Zhao, X. S.
Title Synthesis, characterization and capacitive performance of hydrous manganese dioxide nanostructures
Journal name Nanotechnology   Check publisher's open access policy
ISSN 0957-4484
1361-6528
Publication date 2011-03-01
Sub-type Article (original research)
DOI 10.1088/0957-4484/22/12/125703
Volume 22
Issue 12
Start page 1
End page 9
Total pages 9
Place of publication Bristol, United Kingdom
Publisher Institute of Physics Publishing
Collection year 2012
Language eng
Formatted abstract
Hydrous manganese dioxide nanostructures were synthesized via a catalytic oxidation reaction mechanism at mild temperatures. It was found that the morphology of the manganese dioxide nanostructures was significantly influenced by the pH of the reaction system. With increasing pH the morphology of manganese dioxide nanostructures changed from urchin-like structures to nanobelts. The capacitive performance was investigated by using cycle voltammetry and galvanostatic charge/discharge techniques. Hydrous manganese dioxide nanostructures obtained from a basic solution exhibited a capacitance of 262 F g−1 at a current density of 250 mA g−1 and a capacitive retention of 75% after 1200 cycles, suggesting that this is a promising electrode material for supercapacitors. The high specific capacitance is attributed to the hydrous nature coupled with a high surface area (181 m2 g−1) of the manganese dioxide nanostructure.
Keyword Alpha Mno2 Hierarchical Structures
Pseudocapacitance Properties
Electrochemical Capacitors
Hydrothermal Synthesis
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Non HERDC
 
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