Li(Ni0.40Mn0.40Co0.15Al0.05)O2: A promising positive electrode material for high-power and safe lithium-ion batteries

► First test of ‘NMCA’, an alternative material to the currently commercial ones (NCA). ► Promising results in power tests at 30°C and −20°C. ► Structural stability after long range cycling at 40°C and 20°C in a small potential window. ► Significantly improved thermal stability vs. industrial NCA. L...

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Bibliographic Details
Published in:Journal of power sources 2011-10, Vol.196 (20), p.8625-8631
Main Authors: Bains, J., Croguennec, L., Bréger, J., Castaing, F., Levasseur, S., Delmas, C., Biensan, Ph
Format: Article
Language:English
Subjects:
Aluminium substitution
Applied sciences
Chemical Sciences
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
Layered oxide
Lithium-ion battery
Material chemistry
Materials
Positive electrode material
Power electrochemical performance
Thermal stability
X-ray diffraction
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Summary:► First test of ‘NMCA’, an alternative material to the currently commercial ones (NCA). ► Promising results in power tests at 30°C and −20°C. ► Structural stability after long range cycling at 40°C and 20°C in a small potential window. ► Significantly improved thermal stability vs. industrial NCA. Li1.11(Ni0.40Mn0.39Co0.16Al0.05)0.89O2 was synthesized through coprecipitation of a mixed hydroxide followed by calcination with LiOH·H2O during 10h at 500°C and 950°C. Electrochemical tests and their comparison with those obtained for an industrial Li(Ni1−y−zCoyAlz)O2 material reveal that Li1.11(Ni0.40Mn0.39Co0.16Al0.05)0.89O2 shows good charge–discharge performance, even at high rate according to a protocol well established by car-makers for testing power abilities of batteries for electric and hybrid electric vehicles. In addition, this material shows a significant improvement in thermal stability in the highly deintercalated state (charged state of the battery) over the industrial material. Equivalent (or higher) energy and power densities with a significantly greater thermal stability make of Li1.11(Ni0.40Mn0.39Co0.16Al0.05)0.89O2 an interesting candidate as positive electrode material for large lithium-ion batteries.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2011.06.016