Effect of porosity variation on the electrochemical behavior of vertically aligned multi-walled carbon nanotubes.
Effect of porosity variation on the electrochemical behavior of vertically aligned multi-walled carbon nanotubes.
复制标题
孔隙率变化对垂直排列多壁碳纳米管电化学行为的影响。
DOI：
10.1016/j.elecom.2012.03.021
复制
发表时间：
2012
影响因子：
5.4
通讯作者：
Glass,JeffreyT
中科院分区：
文献类型：
--
作者：
Raut,AkshayS;Parker,CharlesB;Stoner,BrianR;Glass,JeffreyT
报道了垂直排列的多壁碳纳米管(MWCNTs)在不同直径和间距下的电化学电荷存储特性。结果表明，MWCNTs的比电容随管径和管间间距的减小而增大。当在非水电解液中测试时，间距为230 nm的MWCNT薄膜的比容为228F/g，而间距为506 nm的MWCNT薄膜的比容为70F/g。此外，还提出了比电容与孔径之间的变化趋势。再加上之前报道的在小于10 nm孔径范围内观察到的趋势，这有望更好地了解多孔碳材料在广泛的孔径范围内的电化学行为。
Electrochemical charge storage characteristics of vertically aligned multi-walled carbon nanotubes (MWCNTs) as a function of varying diameter and spacing are reported. It was observed that the specific capacitance of the MWCNTs increased as both diameter and inter-tube spacing decreased. The MWCNT films with 230nm inter-MWCNT spacing exhibited specific capacitance of 228F/g versus 70F/g for 506nm spacing, when tested in a non-aqueous electrolyte. Further, a trend in specific capacitance versus pore size is proposed. Coupled with previously reported trends observed in the sub-10nm pore size regime, this is expected to offer better understanding of electrochemical behavior of porous carbon materials over a wide range of pore sizes.