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

Ilias Belharouak, H. Tsukamoto, Khalil Amine

Research output: Contribution to journalConference article

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
EventSelected Papers Presented at the 11th IMLB - Monterey, CA, United States
Duration: 22 Jun 200228 Jun 2002

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Keywords

  • Aging
  • Cyclability
  • LiNiCoO
  • Medical device

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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