All-solid state supercapacitors operating at 3.5 V by using ionic liquid based polymer electrolytes

Tiruye, Girum Ayalneh; Muñoz‐Torrero, David; Palma, Jesús; Anderson, Marc A.; Marcilla, Rebeca

doi:10.1016/j.jpowsour.2015.01.039

Cited by 157 publications

(43 citation statements)

References 37 publications

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“…Liu and co‐workers immobilized 1‐butyl‐3‐methylimidazolium tetrafluoroborate [bmim][BF 4 ] in polyvinylidene fluoride and polyvinyl acetate polymer to prepare GPEs for supercapacitors, resulting in a specific capacitance of 93.3 F g −1 , and the loss of capacitance was less than 10% after 5000 charge–discharge cycles . Marcilla and co‐workers directly blended a poly(ionic liquid) composed of a polycation with a [NTf 2 ] − anion and 1‐butyl‐1‐methylpyrrolidinium bis(trifluoromethylsulfonyl)imide [C 4 mpyr][NTf 2 ] to prepare free standing membranes, and tested them for use in supercapacitors, showing maximum operation voltages up to 3.5 V …”

Section: Introductionmentioning

confidence: 99%

Supported Ionic Liquid Gel Membrane Electrolytes for Flexible Supercapacitors

Zhang

Kar

Mendes

et al. 2018

Advanced Energy Materials

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In this work, a novel and easy‐to‐use methodology is developed to prepare supported ionic liquid gel membranes (SILGMs) by incorporating ionogels into commercial porous supports, to use as both electrolytes and separators for supercapacitors. Macroscopic sol–gel transition temperature, Fourier transform infrared spectra, and thermal behaviors of the ionogels are systematically investigated. Ionic conductivities of the ionogels and SILGMs are measured from 25 to 100 °C. The ionic conductivities of the ionogels are lower by one order of magnitude once they are incorporated into the supports. Nonetheless, the ionic conductivity of the SILGMs has reached the practical application level required for energy storage and conversion devices. Furthermore, the stability and flexibility of SILGMs are investigated as flexible electrolytes for supercapacitor devices (see Video in the Supporting Information). Charge–discharge cycling of symmetric supercapacitors based on the SILGMs reveal specific capacitance as high as 153 F g−1 at 0.1 A g−1, and remain at 101 F g−1 at 10 A g−1. The capacitance retention after 10 000 charge–discharge cycles at 5.0 A g−1 is as high as 97%, demonstrating excellent cycle stability of the device. The studies suggest that SILGMs are promising candidates for stable, high performance, and flexible energy storage and conversion devices that could be made by high volume roll‐to‐roll processing.

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Section: Introductionmentioning

confidence: 99%

Supported Ionic Liquid Gel Membrane Electrolytes for Flexible Supercapacitors

Zhang

Kar

Mendes

et al. 2018

Advanced Energy Materials

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“…In electrochemical devices, the electrolyte has a very important role, since its conductivity, potential window, and range of working temperature determine the operating parameters of the electrochemical devices . Thus, new polymeric electrolyte studies looking for better performance and safety electrochemical devices have been more frequent in the literature …”

Section: Introductionmentioning

confidence: 99%

New all solid‐state polymer electrolyte based on epoxy resin and ionic liquid for high temperature applications

Silva

Soares

2017

J of Applied Polymer Sci

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Flexible epoxy network loaded with high amount of ionic liquid (IL) 1‐decyl‐3‐methylimidazolium bromide ([DMIM]Br) has been reported by using a mixture of polyol amine as curing agent. The IL presents good electrochemical response even at 170 °C, as no evidence of redox reactions was observed. The incorporation of as high as 50 wt % of this IL within the epoxy matrix resulted in solid and flexible electrolyte with good thermal stability below 180 °C, as measured by thermogravimetric analysis and ionic conductivity of around 10−6 S cm−1 at room temperature and higher than 10−3 S cm−1 at high temperature. This electrolyte presented a prodigious potential for applications in electrochemical devices at high temperature like batteries and supercapacitors, and the flexibility of this solid electrolyte persist at low temperature because of its low glass transition temperature. Furthermore, leakage problems were not observed. Thereby, impedance spectroscopy and cyclic voltammetry were performed to characterize the electrochemical properties. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45838.

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“…Because of excellent electrochemical stability and reasonable ionic conductivity in solid phase, PIL electrolytes have been considered as an ideal electrolyte for supercapacitors. However, only a few studies have been reported in this area by Marcilla group, and (Diallyldimethylammonium) bis (trifluoromethanesulfonyl) imide dissolved in [PYR 14 ] was prepared and applied as a solid state electrolyte [91,92]. Impregnating the electrode with the electrolyte before assembling the SCs is an important process for improving the carbonelectrolyte contact.…”

Section: Poly Ionic Liquid As Solid Electrolytementioning

confidence: 99%

Ionic Liquid for High Voltage Supercapacitor

Yoo¹

2018

Supercapacitors - Theoretical and Practical Solutions

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Pure ionic liquids (ILs) and IL mixtures in organic solvents have been investigated for higher operating voltages around 3.0-4.0 V. ILs have design flexibility due to the numerous possible combinations of anions and cations. Current research on ILs as electrolytes has focused on several ILs, including imidazolium and pyrrolidinium. At early stages, various ILs have been studied as salts of electrolyte with organic solvents like acetonitrile and propylene carbonate. Neat ILs have been applied for high-performance electrolyte, and some of them have been used as electrolyte (1-ethyl 3-methylimidazolium tetrafluoroborate). These liquid electrolytes need additional encapsulation; therefore, SCs applied ILs face difficulty in integration and manufacturing flexible devices. These drawbacks can be solved by adopting a polymer electrolyte because the ILs maintain the conductivity even when solidified, unlike a typical organic electrolyte. Common polymer matrixes such as PVdF, PMMA, and PVA have been suggested to embed ILs. Poly(ionic liquid) (PIL) is also studied. PIL is a polymer electrolyte containing a polymer backbone and an IL species in the monomer repeat unit. PIL-based polymer electrolytes have high ionic conductivity, wide electrochemical windows, and high thermal stability.

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All-solid state supercapacitors operating at 3.5 V by using ionic liquid based polymer electrolytes

Cited by 157 publications

References 37 publications

Supported Ionic Liquid Gel Membrane Electrolytes for Flexible Supercapacitors

Supported Ionic Liquid Gel Membrane Electrolytes for Flexible Supercapacitors

New all solid‐state polymer electrolyte based on epoxy resin and ionic liquid for high temperature applications

Ionic Liquid for High Voltage Supercapacitor

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