Cross-linking of polymer and ionic liquid as high-performance gel electrolyte for flexible solid-state supercapacitors

Zhong, Xiongwei1,2; Tang, Jun1; Cao, Lujie1,2; Kong, Weiguang1; Sun, Zheng1; Cheng, Hua1; Lu, Zhouguang1; Pan, Hui2; Xu, Baomin1

2017-08

10.1016/j.electacta.2017.05.110

ELECTROCHIMICA ACTA   影响因子和分区

0013-4686

1873-3859

It is highly desirable to develop flexible solid-state electrochemical double-layer capacitors (EDLCs) with non-liquid electrolyte. However, it is still a great challenge to prepare gel polymer electrolyte (GPE) possessing high ionic conductivity and good mechanical property. In this work, a simple and novel method to improve the conductivity and mechanical properties of GPE film for their applications as electrolyte and separator in EDLC is presented. The GPE film is prepared by cross-linking ionic liquid (IL) with poly (ethylene oxide) (PEO) and benzophenone (Bp) followed by ultraviolet (UV) irradiation. Then, a non-woven cellulose separator (FPC) is used to absorb the GPE. By tuning the mass ratio (n) between IL and PEO, the flexible EDLC cooperated with low-cost active carbon and the electrolyte film with n = 10 has a high capacitance of 70.84 F.g(-1), a wide and stable electrochemical window of 3.5 V, an energy density of 30.13 Wh.kg(-1) and a power density of 874.8 W.kg(-1) at a current density of 1 A.g(-1), which can drive a 3.0 V light-emitting diode (LED). Importantly, the excellent performance of the flexible and low-cost EDLC can be maintained at a bending angle up to 180, indicating the ultra-flexibility. It is expected that the IL-PEO-FPC electrolyte film is a promising candidate of GPE for flexible devices and energy storage systems. (C) 2017 Elsevier Ltd. All rights reserved.

Electric double-layer capacitor gel polymer electrolyte flexible ionic liquid

SCI ; EI

英语

第一 ; 通讯

Research & Development Office at University of Macau[MYRG2014-00159-FST] ; Research & Development Office at University of Macau[MYRG2015-00017-FST]

Electrochemistry

Electrochemistry

WOS:000404314100014

PERGAMON-ELSEVIER SCIENCE LTD

20172103694764

Crosslinking ; Electrolytic capacitors ; Ethylene ; Ionic liquids ; Mechanical properties ; Polyethylene oxides ; Separators ; Solid electrolytes ; Supercapacitor

Electric Components:704.1 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Organic Compounds:804.1 ; Organic Polymers:815.1.1 ; Materials Science:951

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Univ Macau, Inst Appl Phys & Mat Engn, Macau, Peoples R China

Zhong, Xiongwei,Tang, Jun,Cao, Lujie,et al. Cross-linking of polymer and ionic liquid as high-performance gel electrolyte for flexible solid-state supercapacitors[J]. ELECTROCHIMICA ACTA,2017,244:112-118.

Zhong, Xiongwei.,Tang, Jun.,Cao, Lujie.,Kong, Weiguang.,Sun, Zheng.,...&Xu, Baomin.(2017).Cross-linking of polymer and ionic liquid as high-performance gel electrolyte for flexible solid-state supercapacitors.ELECTROCHIMICA ACTA,244,112-118.

Zhong, Xiongwei,et al."Cross-linking of polymer and ionic liquid as high-performance gel electrolyte for flexible solid-state supercapacitors".ELECTROCHIMICA ACTA 244(2017):112-118.