Details

Autor(en) / Beteiligte

• Han, Xiaogang
• Funk, Michael R
• Shen, Fei
• Chen, Yu-Chen
• Li, Yuanyuan
• Campbell, Caroline J
• Dai, Jiaqi
• Yang, Xiaofeng
• Kim, Jae-Woo
• Liao, Yunlong
• Connell, John W
• Barone, Veronica
• Chen, Zhongfang
• Lin, Yi
• Hu, Liangbing

Titel

Scalable Holey Graphene Synthesis and Dense Electrode Fabrication toward High-Performance Ultracapacitors

Ist Teil von

• ACS nano, 2014-08, Vol.8 (8), p.8255-8265

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Graphene has attracted a lot of attention for ultracapacitor electrodes because of its high electrical conductivity, high surface area, and superb chemical stability. However, poor volumetric capacitive performance of typical graphene-based electrodes has hindered their practical applications because of the extremely low density. Herein we report a scalable synthesis method of holey graphene (h-Graphene) in a single step without using any catalysts or special chemicals. The film made of the as-synthesized h-Graphene exhibited relatively strong mechanical strength, 2D hole morphology, high density, and facile processability. This scalable one-step synthesis method for h-Graphene is time-efficient, cost-efficient, environmentally friendly, and generally applicable to other two-dimensional materials. The ultracapacitor electrodes based on the h-Graphene show a remarkably improved volumetric capacitance with about 700% increase compared to that of regular graphene electrodes. Modeling on individual h-Graphene was carried out to understand the excellent processability and improved ultracapacitor performance.