Porous graphene paper for supercapacitor applications

• 来源期刊: 材料科学技术（英文版）
• 年，卷（期）: 2017,（8）
• 页码范围: 793-799
• 页数: 7页
• 语种: 英文

摘要

Graphene paper shows a great promise for the electrical energy storage.However,the high stability,purity and specific surface area have become stringent requirements for supercapacitor applications.Finding methods to tackle these problems is rather challenging.Here,we develop a facile method to prepare porous graphene papers with a thickness 0.5 mm by a thermal shock to the layer-structure graphene paper self-assembled on Cu foil under nitrogen flowing.The as-prepared porous graphene paper exhibits a large specific capacitance of 100 F g-1 at the scan rate of 100 mV s-1 with high stability and purity without any residual chemical reagents,showing a promising potential for supercapacitor applications.The high electrochemical properties are mainly attributed to the high-specific area and the improved conductivity of the porous graphene paper performed by the multieffect of reducing,cleaving and expanding to the layer-structure graphene paper by high-energy thermal heating during the thermal shock process.This work paves a pathway to the facile preparation of porous graphene paper for supercapacitor applications.