Bekzhanov Akzhan, Uzakbaiuly Berik, Mukanova Aliya, Bakenov Zhumabay
Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Kabanbay Batyr Ave. 53, Nur-Sultan 010000, Kazakhstan.
National Laboratory Astana, Nazarbayev University, Kabanbay Batyr Ave. 53, Nur-Sultan 010000, Kazakhstan.
Nanomaterials (Basel). 2022 Jun 25;12(13):2188. doi: 10.3390/nano12132188.
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, LiCoO 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 LiCoO 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 LiCoO 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 and volumetric capacity of 50 µAh cmµm with a 77% retention at 0.5 C rate.
微电池领域是储能系统的一个重要方向，需要在保持现有材料性能的同时对其进行精细的小型化处理。在最近几十年里，LiCoO作为锂离子电池的阴极材料因其在高性能电池方面具有良好的电化学性能而备受关注。在这项工作中，通过对相应靶材进行射频磁控溅射获得了LiCoO薄膜。为了获得所需的晶体结构，对退火时间、温度和加热速率等参数进行了变化，发现这些参数会影响菱面体相的形成。所制备薄膜的电化学性能作为退火时间、温度和加热速率的函数进行了研究。在550℃下退火1小时20分钟的LiCoO薄膜阴极表现出最佳的循环性能，放电比容量约为135 mAh/g，体积容量为50 µAh/cm²，在0.5 C倍率下保持率为77%。
