Safety characteristics of Li(Ni0.8Co0.15Al 0.05)O2 and Li(Ni1/3Co1/3Mn 1/3)O2

Ilias Belharouak, Wenquan Lu, Donald Vissers, Khalil Amine

Research output: Contribution to journalArticle

193 Citations (Scopus)

Abstract

Layered Li0.45(Ni0.8Co0.15Al 0.05)O2 and Li0.55(Ni1/3Co 1/3Mn1/3)O2 materials have been, respectively, prepared by a chemical delithiation of layered Li(Ni0.8Co 0.15Al0.05)O2 and Li(Ni1/3Co 1/3Mn1/3)O2 compounds using NO 2BF4 oxidizer in an acetonitrile medium. The thermal gravimetric results show that both Li0.45(Ni0.8Co 0.15Al0.05)O2 and Li0.55(Ni 1/3Co1/3Mn1/3)O2 powders release oxygen starting from 190 and 250°C with an overall oxygen loss of 11 and 9 wt% at 900°C, respectively. The results show that the oxygen release from these delithiated powders was associated with the occurrence of several structural transformations, ranging from a R3̄m→Fd3m (layered → spinel) transition to a Fd3m → Fm3m (spinel → NiO-type) transition. The 3 wt% weight gain, solely observed for Li0.55(Ni 1/3Co1/3Mn1/3)O2 between 800°C and room temperature, involved a reversible Fd3m←Fm3m(spinel←NiO-type) structural transition. The reactivity of these delithiated powders with electrolytes was investigated by a differential scanning calorimetry (DSC) between room temperature and 375°C. In the case of Li0.55(Ni 1/3Co1/3Mn1/3)O2 powder, the DSC result shows that the oxidation of the electrolyte was delayed by 50°C toward high temperatures with the generation of lower heat when compared to Li0.45(Ni0.8Co0.15Al0.05)O 2 powder. The relationship between the safety characteristics of Li0.45(Ni0.8Co0.15Al0.05)O 2 and Li0.55(Ni1/3Co1/3Mn 1/3)O2 powders and their thermal stability was discussed in the light of their structural rearrangement during the thermal heating processes.

Original languageEnglish
Pages (from-to)329-335
Number of pages7
JournalElectrochemistry Communications
Volume8
Issue number2
DOIs
Publication statusPublished - 1 Feb 2006
Externally publishedYes

Fingerprint

Powders
Oxygen
Electrolytes
Differential scanning calorimetry
Industrial heating
Acetonitrile
Temperature
Thermodynamic stability
Oxidation
Hot Temperature
spinell

Keywords

  • Cathode
  • HEV
  • High power
  • Lithium-ion batteries
  • Thermal stability

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

Safety characteristics of Li(Ni0.8Co0.15Al 0.05)O2 and Li(Ni1/3Co1/3Mn 1/3)O2 . / Belharouak, Ilias; Lu, Wenquan; Vissers, Donald; Amine, Khalil.

In: Electrochemistry Communications, Vol. 8, No. 2, 01.02.2006, p. 329-335.

Research output: Contribution to journalArticle

Belharouak, Ilias ; Lu, Wenquan ; Vissers, Donald ; Amine, Khalil. / Safety characteristics of Li(Ni0.8Co0.15Al 0.05)O2 and Li(Ni1/3Co1/3Mn 1/3)O2 In: Electrochemistry Communications. 2006 ; Vol. 8, No. 2. pp. 329-335.
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abstract = "Layered Li0.45(Ni0.8Co0.15Al 0.05)O2 and Li0.55(Ni1/3Co 1/3Mn1/3)O2 materials have been, respectively, prepared by a chemical delithiation of layered Li(Ni0.8Co 0.15Al0.05)O2 and Li(Ni1/3Co 1/3Mn1/3)O2 compounds using NO 2BF4 oxidizer in an acetonitrile medium. The thermal gravimetric results show that both Li0.45(Ni0.8Co 0.15Al0.05)O2 and Li0.55(Ni 1/3Co1/3Mn1/3)O2 powders release oxygen starting from 190 and 250°C with an overall oxygen loss of 11 and 9 wt{\%} at 900°C, respectively. The results show that the oxygen release from these delithiated powders was associated with the occurrence of several structural transformations, ranging from a R3̄m→Fd3m (layered → spinel) transition to a Fd3m → Fm3m (spinel → NiO-type) transition. The 3 wt{\%} weight gain, solely observed for Li0.55(Ni 1/3Co1/3Mn1/3)O2 between 800°C and room temperature, involved a reversible Fd3m←Fm3m(spinel←NiO-type) structural transition. The reactivity of these delithiated powders with electrolytes was investigated by a differential scanning calorimetry (DSC) between room temperature and 375°C. In the case of Li0.55(Ni 1/3Co1/3Mn1/3)O2 powder, the DSC result shows that the oxidation of the electrolyte was delayed by 50°C toward high temperatures with the generation of lower heat when compared to Li0.45(Ni0.8Co0.15Al0.05)O 2 powder. The relationship between the safety characteristics of Li0.45(Ni0.8Co0.15Al0.05)O 2 and Li0.55(Ni1/3Co1/3Mn 1/3)O2 powders and their thermal stability was discussed in the light of their structural rearrangement during the thermal heating processes.",
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AU - Lu, Wenquan

AU - Vissers, Donald

AU - Amine, Khalil

PY - 2006/2/1

Y1 - 2006/2/1

N2 - Layered Li0.45(Ni0.8Co0.15Al 0.05)O2 and Li0.55(Ni1/3Co 1/3Mn1/3)O2 materials have been, respectively, prepared by a chemical delithiation of layered Li(Ni0.8Co 0.15Al0.05)O2 and Li(Ni1/3Co 1/3Mn1/3)O2 compounds using NO 2BF4 oxidizer in an acetonitrile medium. The thermal gravimetric results show that both Li0.45(Ni0.8Co 0.15Al0.05)O2 and Li0.55(Ni 1/3Co1/3Mn1/3)O2 powders release oxygen starting from 190 and 250°C with an overall oxygen loss of 11 and 9 wt% at 900°C, respectively. The results show that the oxygen release from these delithiated powders was associated with the occurrence of several structural transformations, ranging from a R3̄m→Fd3m (layered → spinel) transition to a Fd3m → Fm3m (spinel → NiO-type) transition. The 3 wt% weight gain, solely observed for Li0.55(Ni 1/3Co1/3Mn1/3)O2 between 800°C and room temperature, involved a reversible Fd3m←Fm3m(spinel←NiO-type) structural transition. The reactivity of these delithiated powders with electrolytes was investigated by a differential scanning calorimetry (DSC) between room temperature and 375°C. In the case of Li0.55(Ni 1/3Co1/3Mn1/3)O2 powder, the DSC result shows that the oxidation of the electrolyte was delayed by 50°C toward high temperatures with the generation of lower heat when compared to Li0.45(Ni0.8Co0.15Al0.05)O 2 powder. The relationship between the safety characteristics of Li0.45(Ni0.8Co0.15Al0.05)O 2 and Li0.55(Ni1/3Co1/3Mn 1/3)O2 powders and their thermal stability was discussed in the light of their structural rearrangement during the thermal heating processes.

AB - Layered Li0.45(Ni0.8Co0.15Al 0.05)O2 and Li0.55(Ni1/3Co 1/3Mn1/3)O2 materials have been, respectively, prepared by a chemical delithiation of layered Li(Ni0.8Co 0.15Al0.05)O2 and Li(Ni1/3Co 1/3Mn1/3)O2 compounds using NO 2BF4 oxidizer in an acetonitrile medium. The thermal gravimetric results show that both Li0.45(Ni0.8Co 0.15Al0.05)O2 and Li0.55(Ni 1/3Co1/3Mn1/3)O2 powders release oxygen starting from 190 and 250°C with an overall oxygen loss of 11 and 9 wt% at 900°C, respectively. The results show that the oxygen release from these delithiated powders was associated with the occurrence of several structural transformations, ranging from a R3̄m→Fd3m (layered → spinel) transition to a Fd3m → Fm3m (spinel → NiO-type) transition. The 3 wt% weight gain, solely observed for Li0.55(Ni 1/3Co1/3Mn1/3)O2 between 800°C and room temperature, involved a reversible Fd3m←Fm3m(spinel←NiO-type) structural transition. The reactivity of these delithiated powders with electrolytes was investigated by a differential scanning calorimetry (DSC) between room temperature and 375°C. In the case of Li0.55(Ni 1/3Co1/3Mn1/3)O2 powder, the DSC result shows that the oxidation of the electrolyte was delayed by 50°C toward high temperatures with the generation of lower heat when compared to Li0.45(Ni0.8Co0.15Al0.05)O 2 powder. The relationship between the safety characteristics of Li0.45(Ni0.8Co0.15Al0.05)O 2 and Li0.55(Ni1/3Co1/3Mn 1/3)O2 powders and their thermal stability was discussed in the light of their structural rearrangement during the thermal heating processes.

KW - Cathode

KW - HEV

KW - High power

KW - Lithium-ion batteries

KW - Thermal stability

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