Electrochemical Properties of Polyaniline-Coated Li-Rich Nickel Manganese Oxide and Role of Polyaniline Coating Layer

Title
Electrochemical Properties of Polyaniline-Coated Li-Rich Nickel Manganese Oxide and Role of Polyaniline Coating Layer
Author
선양국
Issue Date
2014-01
Publisher
ELECTROCHEMICAL SOC INC, 65 SOUTH MAIN STREET, PENNINGTON, NJ 08534 USA
Citation
J. Electrochem Soc. 2014,161(1), A142-A148
Abstract
Polyaniline is coated on Li[Li0.2Ni0.2Mn0.6]O2 synthesized via co-precipitation. X-ray diffraction patterns exhibit that the polyaniline coating does not affect structural change of the Li[Li0.2Ni0.2Mn0.6]O2, and the resulting transmission electron microscopic images show the presence of coating layers on the surface of Li[Li0.2Ni0.2Mn0.6]O2. Electrochemical tests using coin type cells confirm that the surface modification by polyaniline is effective in maintaining capacity and retention upon cycling. The conducting coating character also assists improvement in rate capability. The polyaniline layer forms F-doped polyaniline during cycling, as is proved by time-of-flight secondary ion mass spectroscopy. Therefore, the presence of the polyaniline layers plays a role in lowering HF levels via scavenging F? from HF in the electrolyte, and this F?doped polyaniline layer also assists in protecting the Li[Li0.2Ni0.2Mn0.6]O2 from HF attack upon cycling, resulting in improved electrochemical properties.
URI
http://jes.ecsdl.org/content/161/1/A142http://hdl.handle.net/20.500.11754/54913
ISSN
0013-4651; 1945-7111
DOI
10.1149/2.073401jes
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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