Details

Autor(en) / Beteiligte

• Yang, Shin-Yi
• Chang, Kuo-Hsin
• Tien, Hsi-Wen
• Lee, Ying-Feng
• Li, Shin-Ming
• Wang, Yu-Sheng
• Wang, Jen-Yu
• Ma, Chen-Chi M.
• Hu, Chi-Chang

Titel

Design and tailoring of a hierarchical graphene-carbon nanotube architecture for supercapacitors

Ist Teil von

• Journal of materials chemistry, 2011-01, Vol.21 (7), p.2374-2380

Erscheinungsjahr

2011

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Stacking of individual graphene sheets (GS) is effectively inhibited by introducing one-dimensional carbon nanotubes (CNTs) to form a 3-D hierarchical structure which significantly enhances the electrochemical capacitive performances of GS-based composites. From SEM images, inserting proper quantity of CNTs as nanospacers can effectively impede the stacking of GS and enlarge the space between GS sheets, leading to obtain a highly porous nanostructure. The specific capacitance of GS-CNTs-9-1 ([similar]326.5 F g-1 at 20 mV s-1) is much higher than that of GS material ([similar]83 F g-1). Furthermore, the energy and power densities of GS-CNTs-9-1 are respectively as high as 21.74 Wh kg-1 and 78.29 kW kg-1, revealing that the hierarchical graphene-CNT architecture provides remarkable effects on enhancing the capacitive performance of GS-based composites. Therefore, the GS-CNT composites are promising carbon materials for supercapacitors.