Electrochemical properties of LiNi0.5Mn1.5O4 cathode after Cr doping

Authors
Park, Sung BinEom, Won SobCho, Won IlJang, Ho
Issue Date
2006-09-13
Publisher
ELSEVIER
Citation
JOURNAL OF POWER SOURCES, v.159, no.1, pp.679 - 684
Abstract
The structure and electrochemical properties of Cr doped LiNi0.5-xMn1.5O4 cathodes with different Cr contents (x = 0.00, 0.01, 0.03, and 0.05) were investigated by X-ray diffraction, SEM, cyclic voltammetry, charge-discharge tests, and thermogravimetric analysis. In particular, restoration of Li in the cathode during intercalation was carefully analyzed by employing heating-cooling cycles of thermogravimetric technique. Results showed that the initial discharge capacity and capacity retention of the LiNi0.5-xMn1.5CrxO4 cathode were improved as the Cr content was increased. Thermal analysis and CV test results suggested that the improvement of the electrochemical properties of the Cr doped LiNi0.5-xMn1.5CrxO4 cathode was attributed to the high oxygen affinity of the Cr, which reduced oxygen deficiency and improved structural stability of the cathode. (c) 2005 Elsevier B.V. All rights reserved.
Keywords
SPINEL; LIMN2O4; LICRYMN2-YO4; VOLTAGE; CO; PERFORMANCE; BATTERIES; POWDERS; PHASES; NI; SPINEL; LIMN2O4; LICRYMN2-YO4; VOLTAGE; CO; PERFORMANCE; BATTERIES; POWDERS; PHASES; NI; LiNi0.5Mn1.5O4; doping; chromium; lithium-ion batteries
ISSN
0378-7753
URI
https://pubs.kist.re.kr/handle/201004/135124
DOI
10.1016/j.jpowsour.2005.10.099
Appears in Collections:
KIST Article > 2006
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