LiNi0.5Co0.5O2 as a long-lived positive active material for lithium-ion batteries

Ilias Belharouak, H. Tsukamoto, Khalil Amine

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

LiNi0.5Co0.5O2 layered material could be a possible cathode material for advanced lithium-ion batteries in applications such as medical devices. The material was prepared by the co-precipitation method, which leads to a highly stoichiometric and homogeneous powder with a desirable particle size. It has shown reasonable cycling stability at a C/2 rate up to 100cycles, and is expected to be much more stable at lower rates and capable of providing the needed capacity. We also showed that the use of lithium fluoroalkyl-phosphate Li[PF3(C2F5)3] salt-based electrolyte significantly improves the calendar life of the battery. Aging tests have been performed under severe conditions (storage at 50 °C and 4.1 V) clearly show a huge capacity loss for the conventional cathode LiNi0.8Co0.2O2 while LiNi0.5Co0.5O2 electrode exhibits a limited capacity fading. Finally, because it has less nickel content, differential scanning calorimetry (DSC) measurements confirm that LiNi0.5Co0.5O2 is much safe than the LiNi0.8Co0.2O2 cathode.

Original languageEnglish
Pages (from-to)175-177
Number of pages3
JournalJournal of Power Sources
Volume119-121
DOIs
Publication statusPublished - 1 Jun 2003
Externally publishedYes

Fingerprint

electric batteries
Cathodes
lithium
cathodes
calendars
ions
fading
Coprecipitation
Nickel
Lithium
Powders
Electrolytes
Differential scanning calorimetry
phosphates
Phosphates
heat measurement
Salts
Aging of materials
Particle size
nickel

Keywords

  • Aging
  • Cyclability
  • LiNiCoO
  • Medical device

ASJC Scopus subject areas

  • Electrochemistry
  • Fuel Technology
  • Materials Chemistry
  • Energy (miscellaneous)

Cite this

LiNi0.5Co0.5O2 as a long-lived positive active material for lithium-ion batteries. / Belharouak, Ilias; Tsukamoto, H.; Amine, Khalil.

In: Journal of Power Sources, Vol. 119-121, 01.06.2003, p. 175-177.

Research output: Contribution to journalArticle

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