Synthesis of LiNiO2 cathode materials with homogeneous Al doping at the atomic level

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Journal of Power Sources

DOI:https://doi.org/10.1016/j.jpowsour.2011.08.059· OSTI ID:1026737

Liu, Zengcai ^[1]; Zhen, Honghe ^[2]; Kim, Yoongu ^[1]; Liang, Chengdu ^[1]

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1. ORNL
2. Soochow University, Suzhou, People's Republic of China

Aluminum doped LiNiO2 cathode materials are synthesized by using Raney nickel as the starting material. The structure and composition are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) coupled with elemental mapping. The lithium deficiency is analyzed by Rieveld refinement. The initial capacity and retention of capacity are correlated to the lithium deficiency of the resulting cathode material. Using strong oxidant of Li2O2 in the synthesis results in materials with improved electrochemical cyclability. The improvement is related to the diminishing of lithium deficiency in strong oxidizing synthesis conditions.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1026737
• Journal Information: Journal of Power Sources, Vol. 196, Issue 23; ISSN 0378-7753
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
CAPACITY
CATHODES
LITHIUM
NICKEL
OXIDIZERS
RETENTION
SCANNING ELECTRON MICROSCOPY
SYNTHESIS
X-RAY DIFFRACTION
Raney nickel
homogeneous doping
LiNiO2
lithium-ion batteries