ANNEALING OPTIMIZATION OF LITHIUM COBALT OXIDE THIN FILM FOR USE AS A CATHODE IN LITHIUM-ION MICROBATTERIES
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Date
2022-06-25
Authors
Bekzhanov, Akzhan
Uzakbaiuly, Berik
Mukanova, Aliya
Bakenov, Zhumabay
Journal Title
Journal ISSN
Volume Title
Publisher
Nanomaterials
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 formation. 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.
Description
Keywords
Type of access: Open Access, LiCoO2, lithium-ion microbattery, annealing time, temperature ramp rate, annealing temperature
Citation
Bekzhanov, A., Uzakbaiuly, B., Mukanova, A., & Bakenov, Z. (2022b). Annealing Optimization of Lithium Cobalt Oxide Thin Film for Use as a Cathode in Lithium-Ion Microbatteries. Nanomaterials, 12(13), 2188. https://doi.org/10.3390/nano12132188