Electrochemical hydrogen storage in single-walled carbon nanotube paper.
Single-walled carbon nanotube (SWNT) papers were successfully prepared by dispersing SWNTs in Triton X-100 solution, then filtered by PVDF membrane (0.22 microm pore size). The electrochemical behavior and the reversible hydrogen storage capacity of single-walled carbon nanotube (SWNT) papers have been investigated in alkaline electrolytic solutions (6 N KOH) by cyclic voltammetry, linear micropolarization, and constant current charge/discharge measurements. The effect of thickness and the addition of carbon black on hydrogen adsorption/desorption were also investigated. It was found that the electrochemical charge-discharge mechanism occurring in SWNT paper electrodes is somewhere between that of carbon nanotubes (physical process) and that of metal hydride electrodes (chemical process), and consists of a charge-transfer reaction (Reduction/Oxidation) and a diffusion step (Diffusion).
Guo
Z P
ZP
Institute for Superconducting and Electronic Materials, University of Wollongong, NSW 2522, Australia.
Ng
S H
SH
Wang
J Z
JZ
Huang
Z G
ZG
Liu
H K
HK
Too
C O
CO
Wallace
G G
GG
D000042:Absorption; D004563:Electrochemistry / Q000379:methods*; D006859:Hydrogen; D008422:Materials Testing; D036103:Nanotechnology / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry* / Q000648:ultrastructure*; D010209:Paper; D010316:Particle Size; D014462:Ultrafiltration / Q000379:methods*
D037742:Nanotubes, Carbon; D006859:Hydrogen