Storing elastic energy in carbon nanotubes

被引：21

作者：

Hill, F. A. ^{[1
]}

Havel, T. F. ^{[1
]}

Hart, A. J. ^{[2
]}

Livermore, C. ^{[1
]}

机构：

[1] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

[2] Univ Michigan, Dept Mech Engn, Ann Arbor, MI 48109 USA

来源：

JOURNAL OF MICROMECHANICS AND MICROENGINEERING | 2009年 / 19卷 / 09期

关键词：

SINGLE-WALL; MECHANICS; GROWTH; ROPES;

D O I：

10.1088/0960-1317/19/9/094015

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The potential performance of carbon nanotubes (CNTs) as springs for elastic energy storage is evaluated. Models are used to determine an upper bound on the energy density that can be stored in defect-free individual CNTs and in assemblies of such CNTs. The models reveal that optimal energy density may be achieved in small-diameter single-walled CNTs loaded in tension, with a maximum theoretical energy density for CNT groupings of 7.8 x 10(6) kJ m(-3). Millimeter-scale CNT springs are constructed using 3 mm tall forests of multi-walled CNTs as the starting material, and tensile tests are performed to measure the springs' stiffness, strength and elastic properties. The measured strain energy density of these continuous CNT fibers is comparable to the energy density of steel springs.

引用

页数：5

共 12 条

[1] Capillarity-driven assembly of two-dimensional cellular carbon nanotube foams [J].