Hydrogen storage in high surface area graphene scaffolds.
Using an optimized KOH activation procedure we prepared highly porous graphene scaffold materials with SSA values up to 3400 m(2) g(-1) and a pore volume up to 2.2 cm(3) g(-1), which are among the highest for carbon materials. Hydrogen uptake of activated graphene samples was evaluated in a broad temperature interval (77-296 K). After additional activation by hydrogen annealing the maximal excess H2 uptake of 7.5 wt% was obtained at 77 K. A hydrogen storage value as high as 4 wt% was observed already at 193 K (120 bar H2), a temperature of solid CO2, which can be easily maintained using common industrial refrigeration methods.
Department of Physics, Umeå University, SE-901 87 Umeå, Sweden. alexandr.talyzin@physics.umu.se.
Alexey
A
Klechikov
Guillaume
G
Mercier
Tiva
T
Sharifi
Igor A
IA
Baburin
Gotthard
G
Seifert
Alexandr V
AV
Talyzin