High capacitance electrode materials based on layered double hydroxides prepared by non-aqueous precipitation

Xu, Zhi Ping, Li, Li, Cheng, Ching-Yuan, Ding, Ronggang and Zhou, Chunhui (2013) High capacitance electrode materials based on layered double hydroxides prepared by non-aqueous precipitation. Applied Clay Science, 74 102-108. doi:10.1016/j.clay.2012.06.015


Author Xu, Zhi Ping
Li, Li
Cheng, Ching-Yuan
Ding, Ronggang
Zhou, Chunhui
Title High capacitance electrode materials based on layered double hydroxides prepared by non-aqueous precipitation
Journal name Applied Clay Science   Check publisher's open access policy
ISSN 0169-1317
1872-9053
Publication date 2013-04
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.clay.2012.06.015
Open Access Status
Volume 74
Start page 102
End page 108
Total pages 7
Place of publication Amsterdam, The Netherlands
Publisher Elsevier
Collection year 2014
Language eng
Formatted abstract
Supercapacitors that have been actively sought for electricity storage and many metal oxides/hydroxides, including transition metal-containing layered double hydroxides (LDHs), have been widely investigated. In this research, Co- or Mn-containing LDHs were prepared through precipitation in methanol, followed by the hydrothermal treatment and dispersion in water. As-prepared LDHs showed a relatively high capacitance (13-140Fg-1) at the scanning rate of 1mVs-1 and a current load of 20mAg-1 using 6M KOH as an electrolyte. Calcination of LDHs at 400°C (e.g. LDOs) normally enhances the exposure of electrochemical active species, but can lead to an increase or a decrease of the specific surface area, with a specific capacitance of 50-210Fg-1. We have also noted that the capacitance of both LDOs and LDHs remains stable after 100-500 cycles. The possible mechanism of electron transfer was considered based on the cyclic voltammograms and physicochemical features of LDHs and LDOs
Keyword Layered double hydroxides (LDHs)
Supercapacitors
Electroactive species
Capacitance
Stability
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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