Transparent and Self-Supporting Graphene Films with Wrinkled- Graphene-Wall-Assembled Opening Polyhedron Building Blocks for High Performance Flexible/Transparent Supercapacitors

Na Li; Xuankai Huang; Haiyan Zhang; Yunyong Li; Chengxin Wang

doi:10.1021/acsami.7b00487

Transparent and Self-Supporting Graphene Films with Wrinkled- Graphene-Wall-Assembled Opening Polyhedron Building Blocks for High Performance Flexible/Transparent Supercapacitors

ACS Appl Mater Interfaces. 2017 Mar 22;9(11):9763-9771. doi: 10.1021/acsami.7b00487. Epub 2017 Mar 13.

Authors

Na Li¹, Xuankai Huang¹, Haiyan Zhang¹, Yunyong Li¹, Chengxin Wang²

Affiliations

¹ School of Material and Energy, Guangdong University of Technology , Guangzhou 510006, P. R. China.
² State Key Laboratory of Optoelectronic Materials and Technologies, School of Material Science and Engineering, Sun Yat-sen (Zhongshan) University , Guangzhou 510275, P. R. China.

PMID: 28233984
DOI: 10.1021/acsami.7b00487

Abstract

Improving mass loading while maintaining high transparency and large surface area in one self-supporting graphene film is still a challenge. Unfortunately, all of these factors are absolutely essential for enhancing the energy storage performance of transparent supercapacitors for practical applications. To solve the above bottleneck problem, we produce a novel self-supporting flexible and transparent graphene film (STF-GF) with wrinkled-wall-assembled opened-hollow polyhedron building units. Taking advantage of the microscopic morphology, the STF-GF exhibits improved mass loading with high transmittance (70.2% at 550 nm), a large surface area (1105.6 m²/g), and good electrochemical performance: high energy (552.3 μWh/cm³), power densities (561.9 mW/cm³), a superlong cycle life, and good cycling stability (the capacitance retention is ∼94.8% after 20,000 cycles).

Keywords: all-solid-state; flexible; graphene film; self-supporting; supercapacitor; transparent.