摘要
锂离子进入碳纳米管端口的速度V Li是影响锂离子电池充电性能的重要因素.采用分子动力学模拟方法,研究了直径、温度、电场强度和端口改性官能团四种因子对其影响.运用正交实验方法,分析得出了各因子及其不同水平的影响规律.结果表明,四种因子的影响力度由大到小依次为:电场强度、官能团类型、碳纳米管直径和温度.在本文的模拟条件下,随着电场强度和碳纳米管直径的增大,V Li逐渐增加,且在电场强度下的增幅会更显著;碳纳米管端口官能团分别改性为氢原子(—H),羟基(—OH),氨基(—NH2)以及羧基(—COOH)时,V Li会逐步降低;随着温度的增大,V Li先增加后减小,但整体波动偏幅不大.
The velocity of lithium iron across the entrance of carbon nanotube VLi is an important factor for the charge performance of lithium iron battery. The molecular dynamics simulation is adopted to evaluate the effects of control factors which include electric strength, functional group type, the diameter of carbon nanotube and temperature. By the L16（45） orthogonal array method, the simulations are carried out. The order of influences of control factors is electric filed intensity 〉 functional group 〉 diameter 〉 temperature. Within the ranges of the control factors studied in this work, VLi increases with increasing the diameter of carbon nanotube and electric field strength. Vai decreases with successively modifying the functional groups at the end of carbon nanotube into -H, -OH, -NH2 and -COOH. With the increasing of temperature, VLi first increases then decreases, but on the whole its change is not big.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2014年第20期131-138,共8页
Acta Physica Sinica
基金
国家自然科学基金(批准号:51206195)
重庆市自然科学基金(批准号:cstc2013jcyj A90009)
中央高校基本科研业务费(批准号:CDJZR12110033)资助的课题~~
关键词
分子动力学
碳纳米管
锂离子速度
影响因子
molecular dynamics, carbon nanotube, velocity of lithium ion, control factors
