Enhanced electrochemical activity using vertically aligned carbon nanotube electrodes grown on carbon fiber

Materials Research

Evandro Augusto De Morais¹  Gaston Alvial¹  Rafael Longuinhos¹  Jose Marcos Andrade Figueiredo¹  Rodrigo Gribel Lacerda¹  Andre Santarosa Ferlauto¹  Luiz Orlando Ladeira¹ 

[1] ,Universidade Federal de Minas Gerais Departamento de Física Belo Horizonte MG ,Brazil

关键词: vertically aligned carbon nanotubes;    plasma enhanced chemical vapor deposition;    cyclic voltammetry;   

DOI  :  10.1590/S1516-14392011005000059

来源: SciELO

【 摘 要 】

Vertically aligned carbon nanotubes were successfully grown on flexible carbon fibers by plasma enhanced chemical vapor deposition. The diameter of the CNT is controllable by adjusting the thickness of the catalyst Ni layer deposited on the fiber. Vertically aligned nanotubes were grown in a Plasma Enhanced Chemical Deposition system (PECVD) at a temperature of 630 ºC, d.c. bias of -600 V and 160 and 68 sccm flow of ammonia and acetylene, respectively. Using cyclic voltammetry measurements, an increase of the surface area of our electrodes, up to 50 times higher, was observed in our samples with CNT. The combination of VACNTs with flexible carbon fibers can have a significant impact on applications ranging from sensors to electrodes for fuel cells.

【 授权许可】

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