Preparation and electrochemical properties of Li4Ti5O12/Si3N4 composites as anode materials for high-performance lithium-ion batteries

• Published in: Ceramics international Vol. 48; no. 1; pp. 1006 - 1012
• Main Authors: Wang, Yangyang, Qiu, Zeliang, Yan, Guilin, Zhang, Wentao, Yuan, Fei
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.01.2022
• Subjects: Anode material; Capacity enhancement; Electrochemical performance; Li4Ti5O12/Si3N4; Lithium-ion battery; Anode material; Lithium-ion battery; Electrochemical performance; Li4Ti5O12/Si3N4; Capacity enhancement
• ISSN: 0272-8842; 1873-3956
• DOI: 10.1016/j.ceramint.2021.09.185

Herein, the synthesis of Si3N4-modified Li4Ti5O12 composites was realized for anode materials in high-performance Li-ion batteries. By controlling the introduction content of Si3N4 in the Li4Ti5O12/Si3N4 composites, the morphology and electrochemical performance of the Li4Ti5O12/Si3N4-based Li-ion batteries were investigated. In addition, the XRD and XPS results demonstrated that all samples had the same standard spinel Li4Ti5O12 structure with the Fd3 m space group. Therefore, it is clear that Li4Ti5O12/Si3N4-based anode materials exhibit superior electrochemical performance toward oxygen redox processes in Li-ion systems. The final lithium-ion battery that contains Li4Ti5O12 with a Si3N4 coating amount of 2% has a superior discharge capacity (198.4 mAh/g at 1C), and its capacity retention rate reaches 88.96% after 200 charge-discharge cycles. These results indicate that the as-prepared Li4Ti5O12/Si3N4 composites with excellent electrochemical performances have potential applications in Li-ion batteries as anode materials.