Ni-Mn hydroxides as new high power electrode materials for supercapacitor applications

Title
Ni-Mn hydroxides as new high power electrode materials for supercapacitor applications
Authors
O.A. ShlyakhtinA.M. Skundin윤석진오영제
Keywords
Nanomaterials; Powder technology; Freeze drying; Electrochemical supercapacitors; Ni-Mn hydroxides; *2008년개인평가에반영되었음
Issue Date
2009-01
Publisher
Materials letters
Citation
VOL 63, NO 1, 109-112
Abstract
The coprecipitation of Ni and Mn hydroxides followed by freeze drying results in the formation of agglomerated 20–30 nm particles of complex hydroxide with spinel-like structure. The thermal decomposition of this hydroxide causes the formation of ilmenite-type complex oxide at T N300 °C without considerable changes in the Ni and Mn valence states according to X-ray photoelectron spectroscopy data. Further processing at T ≤400 °C is accompanied by significant particle intergrowth though their internal structure remains nanostructured. Ni–Mn oxide- and hydroxide-based electrodes revealed a significant reversible electrochemical activity in the alkaline electrolytes and an extended operating voltage window (~1.8 V). Ni–Mn ilmenite-based electrode materials demonstrated a low fade rate and high specific electrochemical capacity values at high discharge rates (up to 70 mAh g− 1 at I=70 mA cm− 2) that makes feasible their application in high rate batteries and electrochemical supercapacitors.
URI
http://pubs.kist.re.kr/handle/201004/34487
ISSN
0167-577X
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE