Silicon/flake graphite/carbon anode materials prepared with different dispersants by spray-drying method for lithium ion batteries |
| |
Authors: | Jun LAI Hua-jun GUO Xiang-qun LI Zhi-xing WANG Xin-hai LI Xiao-ping ZHANG Si-lin HUANG Lei GAN |
| |
Affiliation: | School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China |
| |
Abstract: | Silicon/flake graphite/carbon (Si/FG/C) composites were synthesized with different dispersants via spray drying and subsequent pyrolysis, and effects of dispersants on the characteristics of the composites were investigated. The structure and properties of the composites were determined by X-ray diffractometry (XRD), scanning electron microscopy (SEM) and electrochemical measurements. The results show that samples have silicon/flake graphite/amorphous carbon composite structure, good spherical appearances, and better electrochemical performance than pure nano-Si and FG/C composites. Compared with the Si/FG/C composite using washing powder as dispersant, the Si/FG/C composite using sodium dodecyl benzene sulfonate (SDBS) as dispersant has better electrochemical performance with a reversible capacity of 602.68 mA·h/g, and a capacity retention ratio of 91.58 % after 20 cycles. |
| |
Keywords: | lithium ion battery Si/C composite spray drying anode |
本文献已被 ScienceDirect 等数据库收录! |