Material characterization and electrochemical study on LiNi{sub 0.95}Ti{sub 0.05}O{sub 2} materials.

Journal Article · Sat Nov 01 04:00:00 EST 2003 · J. Electrochem. Soc.

DOI:https://doi.org/10.1149/1.1614797· OSTI ID:961064

Kim, J; Liu, J

Layered LiNi{sub 0.95}Ti{sub 0.05}O{sub 2} cathodes were prepared by solid-state reaction and characterized by various techniques. X-ray diffraction shows that the samples have highly ordered and phase-pure layered compounds after heating at 750{sup o}C in an O{sub 2} atmosphere. Scanning electron microscopy and particle size distribution analysis reveal that the LiNi{sub 0.95}Ti{sub 0.05}O{sub 2} material has spherical morphology with particle size of about 12 {mu}m. The LiNi{sub 0.95}Ti{sub 0.05}O{sub 2} electrodes exhibited large capacity and excellent electrochemical behavior. X-ray photoelectron spectroscopy confirms the existence of tetravalent titanium as a substituent. Indications are that the structural integrity of the LiNi{sub 1-x}Ti{sub x}O{sub 2} materials was preserved because the Ti{sup 4+} ions prevented impurity Ni{sup 2+} migration into the lithium sites. Hybrid pulse power characterization testing shows the area specific impedance of 22 {Omega}cm{sup 2}, indicating that the materials could provide more than enough power to level the load on the main engine of the hybrid electric vehicle. Aging tests also show stable impedance values as a function of time (days) at 55{sup o}C, which indicates that the battery based on this material could exhibit long calendar life.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: EE
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 961064
• Report Number(s): ANL/CMT/JA-44283
• Journal Information: J. Electrochem. Soc., Journal Name: J. Electrochem. Soc. Journal Issue: 11 ; Nov. 2003 Vol. 150; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
AGING
CAPACITY
CATHODES
DISTRIBUTION
ELECTRODES
FUNCTIONS
HYBRIDIZATION
IMPEDANCE
IONS
LITHIUM
LITHIUM OXIDES
MATERIALS
MIGRATION
MORPHOLOGY
NICKEL OXIDES
PARTICLE SIZE
POWER
PULSES
SCANNING ELECTRON MICROSCOPY
TESTING
TITANIUM
TITANIUM OXIDES
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY