A Poly(ionic liquid) Gel Electrolyte for Efficient all Solid Electrochemical Double-Layer Capacitor

Taghavikish, Mona; Subianto, Surya; Gu, Yi; Sun, Xiaoming; Xin, Zhao; Choudhury, Namita Roy

doi:10.1038/s41598-018-29028-y

Cited by 48 publications

(25 citation statements)

References 23 publications

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“…Taghavikish et al has already reported that the higher conductivity sample should have higher specific capacitance. 48 The value of specific capacitance is calculated by using the following formula,…”

Section: Resultsmentioning

confidence: 99%

Characterization of proton conducting poly[ethylene oxide]: Poly[vinyl pyrrolidone] based polymer blend electrolytes for electrochemical devices

Muthuvinayagam

Sundaramahalingam

2020

High Performance Polymers

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Proton conducting solid polymer electrolytes comprising PEO: PVP blend with ammonium nitrate in different compositions are prepared by solution casting technique and they are characterized with different techniques. X-ray diffraction (XRD) shows that the prepared polymer electrolytes have amorphous nature. Fourier transform infrared(FTIR) spectroscopy confirms the functional groups present in the polymer membranes. The scanning electron microscopical(SEM) images confirm the presence of smooth surface in the polymer electrolytes. The ionic conductivity values are calculated by ac impedance technique. The maximum ionic conductivity is obtained for 12 wt% ammonium nitrate doped polymer system at ambient temperature (6.39 × 10−5 S/cm). From the transference number analysis by Wagner’s polarization technique, the type of conductivity, mobility and charge-carrier concentration are confirmed. Electrochemical performance is also investigated using cyclic voltammetry (CV) studies.

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Section: Resultsmentioning

confidence: 99%

Characterization of proton conducting poly[ethylene oxide]: Poly[vinyl pyrrolidone] based polymer blend electrolytes for electrochemical devices

Muthuvinayagam

Sundaramahalingam

2020

High Performance Polymers

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“…[81] Mechanical strength was improved on reducing the IL:polymer volume ratio to 0.5:1. [82] Although the addition of IL decreased the glass transition temperature of the composite, the strong ion-dipole interaction between the dissociated Li + cation from LiTFSI and ether oxygen from PEGMA contributed to mechanical stability, even up to 40 o C. [83] Further improvement in mechanical stability at elevated temperatures ⩾60 o C has been investigated through i) a higher degree of cross linking (e.g., by adding a polymerizable IL 1,4-di(vinylimidazolium)butane bisbromide [84] ) and ii) adding nanoparticles such as Al 2 O 3 to promote physical entanglements between the nanoparticles and polymer backbone. [85] To make an SSLMB full cell, a mixed solution of LiTFSI, MePrPyl TFSI, PEGMA monomer, and photoinitiator was directly drop cast onto the composite cathode followed by the same in situ UV cryopolymerization process to make a ≈150 μm thick SSE membrane.…”

Section: Directional Freezing and Polymerizationmentioning

confidence: 99%

A Solid‐State Battery Cathode with a Polymer Composite Electrolyte and Low Tortuosity Microstructure by Directional Freezing and Polymerization

Huang

Leung

et al. 2020

Advanced Energy Materials

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Rechargeable batteries that provide increased specific energy and improved safety over commercial Li ion batteries (LIBs) are in demand for applications such as electric vehicles (EVs), all-electric aircraft and the grid-scale storage of electricity from renewable but intermittent electricial generation. [1] Most commercial LIBs use a graphite anode (theoretical capacity 372 mAh g −1 , electrochemical potential −0.43 V versus standard hydrogen electrode). [2] Although graphite is relatively low cost and easy to process into electrodes at large scale, a switch to a Li metal anode would provide a theoretical capacity of 3860 mAh g −1 and a lower electrochemical potential (−3.04 V versus standard hydrogen electrode). [3] When a Li metal anode is coupled with a high capacity cathode (e.g., LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC811)), the resulting battery would approximately double specific energy from 250 to 300 Wh kg −1 for commercial LIBs to ≈500 Wh kg −1 . [4][5][6] However, a Li metal anode is unstable with conventional liquid electrolytes (which are also flammable) and Li dendrites formed during cycling may readily penetrate through standard porous olefin separators and cause short circuits, rapid discharge, and a range of subsequent safety hazards. [7] Solid-state Li metal batteries (SLMBs) use a solid-state electrolyte (SSE) to replace the liquid electrolyte and separator, and alongside capacity improvements, also have the potential to enable safer cycling, although achieving practical current densities remains a significant challenge. [8] Compared with the high ionic conductivity of liquid electrolytes (10 −3 -10 −2 S cm −1 at room temperature, RT), SSEs usually have much lower intrinsic ionic conductivities at RT, [9] and most SSLMB research has therefore focused on increasing the ionic conductivity of SSEs. The SSEs divide into two main families: inorganic electrolytes and polymer electrolytes. [10] Inorganic electrolyte types include NASICON, [11][12][13] garnet, [14][15][16] perovskite, [17][18][19] LISICON, [20] sulfide, [21][22][23][24] argyrodite, [25][26][27] glassy, [9] etc. Inorganic electrolytes typically have ionic conductivities of 2 × 10 −5 to 2 × 10 −3 S cm −1 at RT. Practical applications have been limited by manufacturing difficulties (fragility over large areas), poor electrode/ SSE interfacial contact, and risk of Li dendrite growth along grain boundaries, although steady progress is being made. [10] In most polymer electrolytes, Li + ionic conductivity is achieved by Solid-state Li metal batteries (SSLMBs) combine improved safety and high specific energy that can surpass current Li ion batteries. However, the Li + ion diffusivity in a composite cathode-a combination of active material and solidstate electrolyte (SSE)-is at least an order of magnitude lower than that of the SSE alone because of the highly tortuous ion transport pathways in the cathode. This lowers the realizable capacity and mandates relatively thin (30-300 μm) cathodes, and hence low overall energy storage. Here, a thick (600 μm...

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“…Taghavikish et al [83] prepared chemically crosslinked polyionic liquid (PIL) GE using 2-hydroxyethyl methacrylate (HEMA) monomer and a polymerizable IL, 1,4-di (vinylimidazolium) butanebisbromide (DVIMBr) in an IL 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF 6 ), which acted as the polymerization solvent (Fig. 12).…”

Section: Ionogelmentioning

confidence: 99%

Safety regulation of gel electrolytes in electrochemical energy storage devices

2019

Sci. China Mater.

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Electrochemical energy storage devices, such as lithium ion batteries (LIBs), supercapacitors and fuel cells, have been vigorously developed and widely researched in past decades. However, their safety issues have appealed immense attention. Gel electrolytes (GEs), with a special state in-between liquid and solid electrolytes, are considered as the most promising candidates in electrochemical energy storage because of their high safety and stability. This review summarized the recent progresses made in the application of GEs in the safety regulation of the electrochemical energy storage devices. Special attention was paid to the gel polymer electrolytes, the organic low molecule-mass GEs, as well as the fumed silica-based and siloxane-based GEs. Finally, the current challenges and future directions were proposed in terms of the development of GEs.

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A Poly(ionic liquid) Gel Electrolyte for Efficient all Solid Electrochemical Double-Layer Capacitor

Cited by 48 publications

References 23 publications

Characterization of proton conducting poly[ethylene oxide]: Poly[vinyl pyrrolidone] based polymer blend electrolytes for electrochemical devices

Characterization of proton conducting poly[ethylene oxide]: Poly[vinyl pyrrolidone] based polymer blend electrolytes for electrochemical devices

A Solid‐State Battery Cathode with a Polymer Composite Electrolyte and Low Tortuosity Microstructure by Directional Freezing and Polymerization

Safety regulation of gel electrolytes in electrochemical energy storage devices

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