粘结剂含量对硅基负极材料循环性能的影响  

Effects of binder content on cycling performance of silicon based anode materials for lithium-ion batteries

作　　者：王建平[1] 田文怀[1] 吴宁宁[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《电源技术》2015年第2期245-248,共4页Chinese Journal of Power Sources

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.

关 键 词：锂离子电池 粘结剂 循环性能 纳米硅 

分 类 号：TM912.9[电气工程—电力电子与电力传动]