Mechanically Tough Large-Area Hierarchical Porous Graphene Films for High-Performance Flexible Supercapacitor Applications

Zhiyuan Xiong; Cailian Liao; Weihua Han; Xiaogong Wang

doi:10.1002/adma.201501983

Mechanically Tough Large-Area Hierarchical Porous Graphene Films for High-Performance Flexible Supercapacitor Applications

Adv Mater. 2015 Aug;27(30):4469-4475. doi: 10.1002/adma.201501983. Epub 2015 Jul 1.

Authors

Zhiyuan Xiong¹, Cailian Liao¹, Weihua Han¹, Xiaogong Wang¹

Affiliation

¹ Department of Chemical Engineering, Laboratory of Advanced Materials (MOE), Tsinghua University, Beijing, 100084, P. R. China.

PMID: 26135240
DOI: 10.1002/adma.201501983

Abstract

Mechanically tough large-area hierarchical porous graphene films are fabricated by blade-casting of graphene oxide hydrogel and postcasting reduction. The as-prepared graphene films, which consist of well-exfoliated graphene nanosheets, possess interpenetrating 3D hierarchical porous structures, high strength and modulus, large specific area, and high electrical conductivity. Flexible film supercapacitors fabricated with the graphene electrodes show superior areal capacitance, good rate performance, and excellent mechanical stability.

Keywords: blade-casting; graphene; hydrogels; porous films; supercapacitors.