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Preparation and electrochemical properties of Li4Ti5O12/Si3N4 composites as anode materials for high-performance lithium-ion batteries
Ceramics International ( IF 5.2 ) Pub Date : 2021-09-17 , DOI: 10.1016/j.ceramint.2021.09.185
Yangyang Wang 1 , Zeliang Qiu 1 , Guilin Yan 1 , Wentao Zhang 1 , Fei Yuan 1
Affiliation  

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.



中文翻译:

Li4Ti5O12/Si3N4复合材料作为高性能锂离子电池负极材料的制备及电化学性能

在此,实现了高性能锂离子电池负极材料的Si 3 N 4改性Li 4 Ti 5 O 12复合材料的合成。通过控制Li 4 Ti 5 O 12 /Si 3 N 4复合材料中Si3N4的引入量,研究了Li 4 Ti 5 O 12 /Si 3 N 4基锂离子电池的形貌和电化学性能。此外,XRD 和 XPS 结果表明所有样品都具有相同的标准尖晶石 Li4Ti5O12 结构,Fd3 m空间群。因此,很明显,Li 4 Ti 5 O 12 /Si 3 N 4基负极材料对锂离子系统中的氧氧化还原过程表现出优异的电化学性能。最终含有Li 4 Ti 5 O 12且Si 3 N 4包覆量为2%的锂离子电池具有优异的放电容量(1C 198.4 mAh/g),200次充电后容量保持率达到88.96% -放电循环。这些结果表明所制备的 Li 4 Ti 5 O 12 /Si 3 N4具有优异电化学性能的复合材料作为负极材料在锂离子电池中有潜在的应用。

更新日期:2021-09-17
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