Thermal behavior of delithiated Li(Ni0.8Co0.15Al0.05)O2 and Li1.1(Ni1/3Co1/3Mn1/3)0.9O2 powders

Ilias Belharouak, Wenquan Lu, Jun Liu, Donald Vissers, Khalil Amine

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

The hybrid pulse power characteristics (HPPC) of Li(Ni0.8Co0.15Al0.05)O2 and Li1.1(Ni1/3Co1/3Mn1/3)0.9O2 electrode materials have been evaluated according to the FreedomCAR test manual and found to meet the power requirements for HEV applications. In addition to its excellent power capability, Li1.1(Ni1/3Co1/3Mn1/3)0.9O2 electrode material has shown much better safety characteristics than the Li(Ni0.8Co0.15Al0.05)O2 electrode material. To investigate the reason for this finding, Li(Ni0.8Co0.15Al0.05)O2 and Li1.1(Ni1/3Co1/3Mn1/3)0.9O2 powders were chemically delithiated using NO2BF4 oxidizer in an acetonitrile medium. The thermal gravimetric results show that both Li0.45(Ni0.8Co0.15Al0.05)O2 and Li0.55(Ni1/3Co1/3Mn1/3)O2 obtained powders release oxygen starting from 190 and 250 °C with an overall oxygen loss of 11 and 6 wt% at 600 °C, respectively. The reactivity of the delithiated powders with several electrolytes was studied by differential scanning calorimetry (DSC) and accelerated rate calorimetry (ARC) techniques. The relationship between the safety characteristics of Li0.45(Ni0.8Co0.15Al0.05)O2 and Li0.55(Ni1/3Co1/3Mn1/3)O2 powders and their thermal stability was discussed in light of their structural rearrangement during thermal heating.

Original languageEnglish
Pages (from-to)905-909
Number of pages5
JournalJournal of Power Sources
Volume174
Issue number2
DOIs
StatePublished - Dec 6 2007
Externally publishedYes

Funding

The submitted manuscript has been created by UChicago Argonne, LLC, Operator of Argonne National Laboratory (“Argonne”). Argonne, a U.S. Department of Energy Office of Science laboratory, is operated under contract no. DE-AC02-06CH11357. The U.S. Government retains for itself, and others acting on its behalf, a paid-up nonexclusive, irrevocable worldwide license in said article to reproduce, prepare derivative works, distribute copies to the public and perform publicly and display publicly, by or on behalf of the Government. The authors acknowledge the financial support of the U.S. Department of Energy, FreedomCAR and Vehicle Technologies Office. Argonne National Laboratory is operated for the U.S. Department of Energy by UChicago Argonne, LLC, under contract DE-AC0Z-06CH11357

FundersFunder number
U.S. Department of EnergyDE-AC02-06CH11357
Argonne National LaboratoryDE-AC0Z-06CH11357

    Keywords

    • Layered cathode
    • Lithium batteries
    • Oxygen release
    • Safety

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