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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 23, Number 5
BKCSDE 23(5)
May 20, 2002 
 
Title
 Synthesis and Electrochemical Characteristics of Li0.7[Ni0.05Mn0.95]O2 as a Positive Material for Rechargeable Lithium Batteries
Author
 Sun-Sik Shin, Dong-Won Kim, Yang-Kook Sun
Keywords
 Lithium secondary batteries, Sol-gel method, Layered manganese, Cathode materials.
Abstract
 Layered Na0.7[Ni0.05Mn0.95]O2 compounds have been synthesized by a sol-gel method, using glycolic acid as a chelating agent. Na0.7[Ni0.05Mn0.95]O2 precursors were used to prepare layered lithium manganese oxides by ion exchange for Na by Li, using LiBr in hexanol. Powder X-ray diffraction shows the layered Na0.7[Ni0.05Mn0.95]O2 has an O3 type structure, which exhibits a large reversible capacity of approximately 190 mA h g-1 in the 2.4-4.5 V range. Na0.7[Ni0.05Mn0.95]O2 powders undergo transformation to spinel during cycling.
Page
 679 - 682
Full Text
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