摘要
通过优化粘结剂在锂离子电池电极中的质量分数,使纳米硅作为锂离子电池负极材料的可逆比容量和循环寿命达到最优。电化学性能测试采用双电极扣式电池进行,实验结果表明:当粘结剂的质量分数为20%和导电剂的质量分数为10%时,以纳米硅为负极材料的锂离子电池可逆比容量达到1 440 m Ah/g,首次库仑效率为47.9%,5次循环后容量保持率为14%。
The reversible capacity and cycle life of lithium ion batteries using nano-silicon as anode materials exhibited excellent values under the optimized the binder content. The electrochemical performance tests were carried out in the two electrodes button cell. The results indicate that the rechargeable specific capacity of nano-silicon based anode material is up to 1444 mAh/g and the first coulombic efficiency reached 47.9% and remarkably the electrochemical capacity remains 14%after 5 cycles when the binder content is optimized to be 20%and content of conductive is supposed to be 10% respectively.
出处
《电源技术》
CAS
CSCD
北大核心
2015年第2期245-248,共4页
Chinese Journal of Power Sources
关键词
锂离子电池
粘结剂
循环性能
纳米硅
Li-ion battery
binder
cycling performance
nano-silicon
