Annealing Optimization of Lithium Cobalt Oxide Thin Film for Use as a Cathode in Lithium-Ion Microbatteries

Akzhan Bekzhanov, Berik Uzakbaiuly, Aliya Mukanova, Zhumabay Bakenov

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The microbatteries field is an important direction of energy storage systems, requiring the careful miniaturization of existing materials while maintaining their properties. Over recent decades, LiCoO2 has attracted considerable attention as cathode materials for lithium-ion batteries due to its promising electrochemical properties for high-performance batteries. In this work, the thin films of LiCoO2 were obtained by radio-frequency magnetron sputtering of the corresponding target. In order to obtain the desired crystal structure, the parameters such as annealing time, temperature, and heating rate were varied and found to influence the rhombohedral phase for-mation. The electrochemical performances of the prepared thin films were examined as a function of annealing time, temperature, and heating rate. The LiCoO2 thin film cathode annealed at 550 °C for 1 h 20 min demonstrated the best cycling performance with a discharge specific capacity of around 135 mAh g−1 and volumetric capacity of 50 µAh cm−2µm−1 with a 77% retention at 0.5 C rate.

Original languageEnglish
Article number2188
JournalNanomaterials
Volume12
Issue number13
DOIs
Publication statusPublished - Jul 1 2022

Keywords

  • annealing temperature
  • annealing time
  • LiCoO2
  • lithium-ion microbattery
  • temperature ramp rate

ASJC Scopus subject areas

  • General Chemical Engineering
  • General Materials Science

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