Polymer electrolytes for lithium polymer batteries

Long, Lizhen; Wang, Shuanjin; Xiao, Min; Ye, Meng

doi:10.1039/c6ta02621d

Cited by 1,078 publications

(841 citation statements)

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“…Figure 1 shows that the prominent peak of PMMA at 13:8 disappeared and the intense peaks 2 % 29:7 ; 38:3 of PVDF-HFP decrease together with the broadening and the incorporation of LiClO 4 up to 7.5 wt.% which indicates the increase in the amorphicity of the films. The amorphous phase is maintained up to 7.5 wt.% LiClO 4 and on further addition, the crystallinity of the complex is found to be increased.…”

Section: Xrd Analysismentioning

confidence: 91%

“…This study has been carried out to analyze the molecular interaction and complexation in the polymer complexes. Figure 2 shows the FTIR spectrum of pure PVDF-HFP, pure PMMA and LiClO 4 . The FTIR spectra of GPE doped with different concentrations of LiClO 4 in the wave number range 400-4000 cm À1 are presented in Fig.…”

Section: Ftir Analysismentioning

confidence: 99%

“…It increases the effective number of mobile ions that take part in the conduction process. 4 These polymer electrolytes have a few points of interest, such as no leakage of electrolytes, ease of preparation of polymer into thin films, high energy density, high compatibility, and no electrolytic degradation as compared to carbonate-based liquid electrolytes. However, solid polymer electrolyte using different polymer hosts such as PEO, PVA, PMMA, PVDF possesses very low ionic conductivity which excludes it from practical applications.…”

Section: Introductionmentioning

confidence: 99%

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Ionic conductivity and relaxation studies in PVDF-HFP:PMMA-based gel polymer blend electrolyte with LiClO₄salt

Gohel

Kanchan

2018

J. Adv. Dielect.

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Poly(vinylidene fluoride-hexafluropropylene) (PVDF-HFP) and poly(methyl methacrylate) (PMMA)-based gel polymer electrolytes (GPEs) comprising propylene carbonate and diethyl carbonate mixed plasticizer with variation of lithium perchlorate (LiClO 4 ) salt concentrations have been prepared using a solvent casting technique. Structural characterization has been carried out using XRD wherein diffraction pattern reveals the amorphous nature of sample up to 7.5 wt.% salt and complexation of polymers and salt have been studied by FTIR analysis. Surface morphology of the samples has been studied using scanning electron microscope. Electrochemical impedance spectroscopy in the temperature range 303-363 K has been carried out for electrical conductivity. The maximum room temperature conductivity of 2.83Â10 À4 S cm À1 has been observed for the GPE incorporating 7.5 wt.% LiClO 4 . The temperature dependence of ionic conductivity obeys the Arrhenius relation. The increase in ionic conductivity with change in temperatures and salt content is observed. Transport number measurement is carried out by Wagner's DC polarization method. Loss tangent (tan ) and imaginary part of modulus (M 00 ) corresponding to dielectric relaxation and conductivity relaxation respectively show faster relaxation process with increasing salt content up to optimum value of 7.5 wt.% LiClO 4 . The modulus (M 00 ) shows that the conductivity relaxation is of non-Debye type (broader than Debye peak).

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Section: Xrd Analysismentioning

confidence: 91%

Section: Ftir Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ionic conductivity and relaxation studies in PVDF-HFP:PMMA-based gel polymer blend electrolyte with LiClO₄salt

Gohel

Kanchan

2018

J. Adv. Dielect.

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“…In addition, solid electrolytes circumvent several problems associated with liquid electrolytes such as the leakage of electrolyte solution and the reaction of volatile organic solvents. 7 Of the solid electrolytes, polymer electrolytes have garnered the most interest in recent years. [8][9][10][11] These membranes facilitate ionic transport between electrodes, inhibit electron flow between electrodes, prevent direct contact between electrodes, and minimize mixing of the anolyte and catholyte.…”

Section: The 21mentioning

confidence: 99%

Method of Measuring Salt Transference Numbers in Ion-Selective Membranes

Vardner

Ling

Russell

et al. 2017

J. Electrochem. Soc.

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A technique to measure the cation-transference number of salts in fully hydrated ion-selective membranes has been developed and demonstrated on Nafion 117 for LiCl and Li 2 SO 4 . Dilute solution theory is used to identify experimental conditions that reduce the propagation of uncertainties in membrane properties to transference number estimates. This technique has advantages over commonly used methods, including the elimination of the need for the analysis of electrode potentials in approaches that exploit electroanalytical methods or the need for additional information required to reconcile NMR-based methods with the bulk transport property. It additionally allows for numerous measurements per day and offers the possibility to relate trace measurements of either cations or anions to values of transference number. For LiCl both modes of the technique were employed; the anion-tracer method is more precise and gives t + = 0.936 ± 0.010. The experimental procedure was repeated using the cation-tracer method for Li 2 SO 4 , and t + = 0.95 ± 0.06 was estimated. The 21 st century presents a key challenge in energy storage due to the intermittency of wind and solar energy sources. Lithium ion batteries, fuel cells, and redox flow batteries are promising technologies for energy storage since they have high energy densities, are environmentally friendly, and have an array of other desirable properties. [1][2][3][4][5][6] Solid electrolytes are ubiquitous for these energy storage systems since they serve the important function of mechanical separation between electrodes. In addition, solid electrolytes circumvent several problems associated with liquid electrolytes such as the leakage of electrolyte solution and the reaction of volatile organic solvents.7 Of the solid electrolytes, polymer electrolytes have garnered the most interest in recent years. [8][9][10][11] These membranes facilitate ionic transport between electrodes, inhibit electron flow between electrodes, prevent direct contact between electrodes, and minimize mixing of the anolyte and catholyte.In recent decades, researchers have sought to understand the relationship between the molecular structure of polymer electrolytes and their performance. These structure-property relationships have been developed for two major types of polymer electrolytes: (I) mixtures of salts in high molecular weight polymers and (II) polymerized ionic liquids (single ion conductors). Polyethylene oxide (PEO), polypropylene oxide (PPO), and 4 poly[bis(methoxy-ethoxyethoxy) phosphazene] (MEEP) are all promising Type I polymer electrolytes.12-16 The electron-donating groups incorporated into the polymer architecture are responsible for solvating the lithium ion while the fast segmental dynamics promote high ionic conductivities through fluctuation-driven diffusion. [17][18][19] However, Type I polymer electrolytes typically suffer from poor mechanical properties, which is an unfortunate compromise for the fast segmental dynamics. Furthermore, Type I polymer electrolytes have relative...

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“…In particular, chemically and physically stable solid electrolytes are favourable for many such applications compared to their liquid counterpart [1][2][3]. Owing to the recent extensive research aimed at developing lithium ion batteries, etc., the field of cation-conducting solid polymer electrolytes has gained a rapid development [3,4]. In contrary, the solid polymer anionic conductors have not been studied in greater detail and as a result, reports on dielectric analysis of such anion conductors are rare to find, and the present work is intended to fill that gap.…”

Section: Introductionmentioning

confidence: 88%

Electrical and complex dielectric behaviour of composite polymer electrolyte based on PEO, alumina and tetrapropylammonium iodide

Bandara

Karunathilaka

Ratnasekera

et al. 2017

Ionics

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In this study, the electrical, dielectric and morphological analysis of composite solid polymer electrolytes containing polyethylene oxide, alumina nano-fillers and tetrapropylammonium iodide are conducted. The temperature dependence of conductivity shows activation energy of 0.23, 0.20 and 0.29 eV for electrolytes containing 0, 5 and 15 wt.% alumina, respectively, when data fitted to the Arrhenius equation. These activation energy values are in good agreement with those determined from dielectric measurements. The result confirms the fact that conductivity is activated by both the mobility and the charge carrier density. The conductivity isotherms demonstrated the existence of two peaks, at 5 and 15 wt.% Al 2 O 3 composition. The highest conductivity values of 2.4 × 10 −4 , 3.3 × 10 −4 and 4.2 × 10 −4 S cm −1 are obtained for the sample with 5 wt.% Al 2 O 3 at 0, 12 and 24°C, respectively, suggesting an enhancement of conductivity compared with that of alumina free samples.

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Polymer electrolytes for lithium polymer batteries

Abstract: In this review, state-of-the-art polymer electrolytes are discussed with respect to their electrochemical and physical properties for their application in lithium polymer batteries.

Cited by 1,078 publications

References 342 publications

Ionic conductivity and relaxation studies in PVDF-HFP:PMMA-based gel polymer blend electrolyte with LiClO₄salt

Ionic conductivity and relaxation studies in PVDF-HFP:PMMA-based gel polymer blend electrolyte with LiClO₄salt

Method of Measuring Salt Transference Numbers in Ion-Selective Membranes

Electrical and complex dielectric behaviour of composite polymer electrolyte based on PEO, alumina and tetrapropylammonium iodide

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Polymer electrolytes for lithium polymer batteries

Abstract: In this review, state-of-the-art polymer electrolytes are discussed with respect to their electrochemical and physical properties for their application in lithium polymer batteries.

Cited by 1,078 publications

References 342 publications

Ionic conductivity and relaxation studies in PVDF-HFP:PMMA-based gel polymer blend electrolyte with LiClO4salt

Ionic conductivity and relaxation studies in PVDF-HFP:PMMA-based gel polymer blend electrolyte with LiClO4salt

Method of Measuring Salt Transference Numbers in Ion-Selective Membranes

Electrical and complex dielectric behaviour of composite polymer electrolyte based on PEO, alumina and tetrapropylammonium iodide

Contact Info

Product

Resources

About

Ionic conductivity and relaxation studies in PVDF-HFP:PMMA-based gel polymer blend electrolyte with LiClO₄salt

Ionic conductivity and relaxation studies in PVDF-HFP:PMMA-based gel polymer blend electrolyte with LiClO₄salt