锂离子电池Sn-Co-C复合材料的制备及性能

Preparation and properties of Sn-Co-C composite for lithium ion batteries

以金属锡粉(Sn)、金属钴粉(Co)和乙炔黑为主要原料,综合利用固相烧结和高能球磨的方法制备出Sn-Co-C复合负极材料,采用XRD、SEM、EDS和恒电流充放电等技术对材料进行了表征和电性能测试.实验结果表明:高能球磨处理后,Sn-Co-C复合材料颗粒尺寸减小,首次放电容量显著提升,为476.8 m Ah/g;经过30次循环后可逆容量仍保持在394.4 m Ah/g.

This paper synthesized the Sn-Co-C composite materials by solid state sintering and high-energy ball milling using elemental Sn and elemental Co materials. The materials were characterized by XRD, SEM, EDS and constant current charge and discharge technology. The experimental results show that the particle size of Sn-Co-C composite material decreases, and the first discharge capacity is significantly improved, which is 476.8 mAh/g. After 30 cycles, the reversible capacity still remained at 394.4 mAh/g.