Glycerol solvothermal synthesis of high-performance lithium-ion battery cathode materials with surface oxygen vacancies

• Published in: Journal of materials science. Materials in electronics 2024-02, Vol.35 (5), p.358, Article 358
• Main Authors: Yu, Fagang, Zou, Zhengguang, Huang, Yiying, Feng, Min, Zhang, Shuchao, Liang, Fangan, Nong, Jinxia, Chen, Min, Jia, Shengkun
• Format: Article
• Language: English
• Subjects: Cathodes; Characterization and Evaluation of Materials; Chemical synthesis; Chemistry and Materials Science; Discharge; Electrode materials; Glycerol; Lithium-ion batteries; Materials Science; Optical and Electronic Materials; Oxygen; Rechargeable batteries; Transition metals
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-024-12125-2

Utilizing the glycerol-assisted solvothermal method, we successfully synthesized a high-performance lithium-rich layered cathode material, Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 , adjusting the concentration of transition metal ions. The samples prepared via the solvothermal method exhibit a more homogeneous microstructure, with those synthesized at optimal transition metal concentrations demonstrating lower cation mixing degrees and increased surface oxygen vacancies. In comparison to LMR, the LMR-D samples exhibit enhanced cycling performance, higher discharge capacity, and superior multiplicity performance. The discharge capacity of LMR-D reached 279.6 mA h g −1 at 1 C (250 mAhg −1 ). At 1 C (250 mAhg −1 ), the discharge capacity of LMR-D reached 279.6 mA h g −1 , retaining 181.2 mA h g −1 after 500 cycles, demonstrating a capacitance retention of 66.32%. In contrast, the capacity of LMR was 101.5 mA after 500 cycles, with a retention rate of 39.05%. The enhanced sample capacity and multiplicity performance of LMR-D can be attributed to both structural ordering and the increased presence of surface oxygen vacancies.