The effect of lithium salt type on ionic conductivity of poly(vinylidene difluoride)-based solid polymer electrolytes

Solid polymer electrolyte (SPE) appropriate to solve packaging leakage and expansion volume in lithium-ion battery systems. Evaluation of electrochemical performance of SPE consisted of mixture lithium salt, solid plasticizer, and polymer precursor with different ratio. Impedance spectroscopy was used to investigate ionic conduction and dielectric response lithium bis(trifluoromethane)sulfony imide (LiTFSI) salt, and additive succinonitrile (SCN) plasticizer. The result showing enhanced high ionic conductivity. In half-cell configurations, wide electrochemical stability window of the SPE has been tested. Have stability window at room temperature, indicating great potential of SPE for application in lithium ion batteries. Additive SCN contribute to forming pores that make it easier for the li ion to move from the anode to the cathode and vice versa for better perform SPE. Pore of SPE has been charaterization with FE-SEM. Additive 5% w.t SCN shows the best ionic conductivity with 4.2 volt wide stability window and pretty much invisible pores.

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Solid Polymer Electrolytes Derived from Crosslinked Polystyrene Nanoparticles Covalently Functionalized with a Low Lattice Energy Lithium Salt Moiety

ChemEngineering ◽

10.3390/chemengineering4030044 ◽

2020 ◽

Vol 4 (3) ◽

pp. 44

Author(s):

Xinyi Mei ◽

Wendy Zhao ◽

Qiang Ma ◽

Zheng Yue ◽

Hamza Dunya ◽

...

Keyword(s):

Ionic Conductivity ◽

Polymer Electrolytes ◽

Room Temperature ◽

Lithium Salt ◽

Lattice Energy ◽

Solid Polymer Electrolytes ◽

Solid Polymer ◽

Polystyrene Nanoparticles ◽

Crosslinked Polystyrene ◽

Poly Ethylene

Three new crosslinked polystyrene nanoparticles covalently attached with low lattice energy lithium salt moieties were synthesized: poly(styrene lithium trifluoromethane sulphonyl imide) (PSTFSILi), poly(styrene lithium benzene sulphonyl imide) (PSPhSILi), and poly(styrene lithium sulfonyl-1,3-dithiane-1,1,3,3-tetraoxide) (PSDTTOLi). A series of solid polymer electrolytes (SPEs) were formulated by mixing these lithium salts with high molecular weight poly(ethylene oxide), poly(ethylene glycol dimethyl ether), and lithium bis(fluorosulfonyl)imide. The crosslinked nano-sized polymer salts improved film strength and decreased the glass transition temperature (Tg) of the polymer electrolyte membranes. An enhancement in both ionic conductivity and thermal stability was observed. For example, the SPE film containing PSTFSILi displayed ionic conductivity of 7.52 × 10−5 S cm−1 at room temperature and 3.0 × 10−3 S cm−1 at 70 °C, while the SPE film containing PSDTTOLi showed an even better performance of 1.54 × 10−4 S cm−1 at room temperature and 3.23 × 10−3 S cm−1 at 70 °C.

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Effect of X-ray Irradiation on Dielectric Properties of Polymer Electrolytes Complexed with LiCF3SO3

Journal of New Materials for Electrochemical Systems ◽

10.14447/jnmes.v17i3.404 ◽

2014 ◽

Vol 17 (3) ◽

pp. 139-145 ◽

Cited By ~ 4

Author(s):

C. Vijil Vani ◽

S. Thanikaikarasan ◽

T. Mahalingam ◽

P. J. Sebastian ◽

L. E. Verea ◽

...

Keyword(s):

Ionic Conductivity ◽

Polyethylene Oxide ◽

Polymer Electrolytes ◽

Lithium Salt ◽

Solid Polymer Electrolytes ◽

Solid Polymer ◽

Frequency Range ◽

Lithium Ions ◽

X Ray ◽

The Given

Solid polymer electrolytes of polyethylene oxide (PEO) embedded with LiCF3SO3 was prepared and subjected to X-ray irradiation of different dosages (1.5 to 6 Gy). Ionic conductivity and dielectric studies were made over a frequency range of 100 Hz to 490 KHz. A little increase in ionic conductivity was noted for the sample irradiated for 1.5 Gy and the equivalent circuit remained unaltered for irradiated samples. Remarkable increase in dielectric constant was found for the irradiated samples. It was found that irradiation improved the dissolution of lithium salt and increased the polymer/Lithium interaction and thus improved the polarizability of the electrolyte. The frequency of hopping and liberation of free lithium ions were found altered by irradiation and hence the given dosage was found to have an optimum value in concern with the ionic conductivity of the electrolyte.

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Solid Polymer Electrolytes from Crosslinked PEG and Dilithium N,N'-Bis(trifluoromethanesulfonyl)perfluoroalkane-1,ω-disulfonamide and Lithium Bis(trifluoromethanesulfonyl)imide Salts

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20081777 ◽

2008 ◽

Vol 73 (12) ◽

pp. 1777-1798 ◽

Cited By ~ 1

Author(s):

Olt E. Geiculescu ◽

Rama V. Rajagopal ◽

Emilia C. Mladin ◽

Stephen E. Creager ◽

Darryl D. Desmarteau

Keyword(s):

Ionic Conductivity ◽

Polymer Electrolytes ◽

Minimum Energy ◽

Ionic Conductivities ◽

Solid Polymer Electrolytes ◽

Solid Polymer ◽

Segmental Motion ◽

Concentrated Electrolytes ◽

Two Factors ◽

Poly Ethylene

The present work consists of a series of studies with regard to the structure and charge transport in solid polymer electrolytes (SPE) prepared using various new bis(trifluoromethanesulfonyl)imide (TFSI)-based dianionic dilithium salts in crosslinked low-molecular-weight poly(ethylene glycol). Some of the thermal properties (glass transition temperature, differential molar heat capacity) and ionic conductivities were determined for both diluted (EO/Li = 30:1) and concentrated (EO/Li = 10:1) SPEs. Trends in ionic conductivity of the new SPEs with respect to anion structure revealed that while for the dilute electrolytes ionic conductivity is generally rising with increased length of the perfluoroalkylene linking group in the dianions, for the concentrated electrolytes the trend is reversed with respect to dianion length. This behavior could be the result of a combination of two factors: on one hand a decrease in dianion basicity that results in diminished ion pairing and an enhancement in the number of charge carriers with increasing fluorine anion content, thereby increasing ionic conductivity while on the other hand the increasing anion size and concentration produce an increase in the friction/entanglements of the polymeric segments which lowers even more the reduced segmental motion of the crosslinked polymer and decrease the dianion contribution to the overall ionic conductivity. DFT modeling of the same TFSI-based dianionic dilithium salts reveals that the reason for the trend observed is due to the variation in ion dissociation enthalpy, derived from minimum-energy structures, with respect to perfluoroalkylene chain length.

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Thermal and Electrochemical Properties of Solid Polymer Electrolytes Prepared via Lithium Salt-Catalyzed Epoxide Ring Opening Polymerization

Applied Sciences ◽

10.3390/app11041561 ◽

2021 ◽

Vol 11 (4) ◽

pp. 1561

Author(s):

Gabrielle Foran ◽

Nina Verdier ◽

David Lepage ◽

Arnaud Prébé ◽

David Aymé-Perrot ◽

...

Keyword(s):

Electrochemical Properties ◽

Polymer Electrolytes ◽

Ring Opening ◽

Lithium Salt ◽

Ring Opening Polymerization ◽

Solid Polymer Electrolytes ◽

Solid Polymer ◽

Polymerization Reaction ◽

Epoxide Ring ◽

Epoxide Ring Opening

Solid polymer electrolytes have been widely proposed for use in all solid-state lithium batteries. Advantages of polymer electrolytes over liquid and ceramic electrolytes include their flexibility, tunability and easy processability. An additional benefit of using some types of polymers for electrolytes is that they can be processed without the use of solvents. An example of polymers that are compatible with solvent-free processing is epoxide-containing precursors that can form films via the lithium salt-catalyzed epoxide ring opening polymerization reaction. Many polymers with epoxide functional groups are liquid under ambient conditions and can be used to directly dissolve lithium salts, allowing the reaction to be performed in a single reaction vessel under mild conditions. The existence of a variety of epoxide-containing polymers opens the possibility for significant customization of the resultant films. This review discusses several varieties of epoxide-based polymer electrolytes (polyethylene, silicone-based, amine and plasticizer-containing) and to compare them based on their thermal and electrochemical properties.

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Polyvinyl fibers as outperform candidature in the solid polymer electrolytes

Journal of Industrial Textiles ◽

10.1177/1528083720970620 ◽

2020 ◽

pp. 152808372097062

Author(s):

Muhammad Yameen Solangi ◽

Umair Aftab ◽

Muhammad Ishaque ◽

Aqeel Bhutto ◽

Ayman Nafady ◽

...

Keyword(s):

Thermal Stability ◽

Weight Loss ◽

Ionic Conductivity ◽

Polymer Electrolytes ◽

Vital Role ◽

Solid Polymer Electrolytes ◽

Solid Polymer ◽

Main Challenge ◽

Different Temperatures ◽

Solution Cast

Solid polymer electrolytes (SPEs) are the best choice to replace liquid electrolytes in supercapacitors, fuel cells, solar cells and batteries. The main challenge in this filed is the ionic conductivity and thermal stability of SPEs which is still not up to mark, therefore more investigations are needed to address these issues. In this study, PVA/salt based SPEs was fabricated using both solution cast and electro-spinning methods to probe the effect of different salts such as (NaCl, KCl and KI) and their concentrations on the ionic conductivity. Scanning electron microscopy (SEM) x and Fourier Transform Infra-Red (FTIR) have been employed to study the morphology as well as the different functional groups of SPEs, respectively. It was noted that small addition of NaCl, KCl and KI salts in SPEs dramatically increased the ionic conductivity to 5.95×10−6, 5.31×10−6 and 4.83×10−6 S/cm, respectively. Importantly, the SPEs obtained with NaCl via electro-spinning have higher ionic conductivity (5.95×10−6 S/cm) than their casted SPEs (1.87×10−6 S/cm). Thermal stability was also studied at two different temperatures i.e. 80 °C and 100 °C. The weight loss percentage of electrospun SPEs have zero percent weight loss than the solution based SPEs. The combined results clearly indicated that the nature of salt, concentration and fabrication process play a vital role in the ionic conductivity. Also, the NaCl salt with low molecular weight at low concentrations shows an enhanced ionic conductivity.

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Characterization of Plasticized PMMA-LiClO4 Solid Polymer Electrolytes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.585.185 ◽

2012 ◽

Vol 585 ◽

pp. 185-189 ◽

Cited By ~ 3

Author(s):

Rajni Sharma ◽

Anjan Sil ◽

Subrata Ray

Keyword(s):

Ionic Conductivity ◽

Polymer Electrolytes ◽

Thermal Analyses ◽

Impedance Analysis ◽

Solid Polymer Electrolytes ◽

Solid Polymer ◽

Casting Technique ◽

Ac Impedance Analysis ◽

Solution Casting Technique

In the present work, the effect of Li salt i.e. LiClO4 contained in composite plasticizer (PC+DEC) with three different concentrations on ionic transport and other electrochemical properties of PMMA based gel polymer electrolytes synthesized has been investigated. The electrolytes have been synthesized by solution casting technique by varying the wt (%) of salt and plasticizer. The formation of polymer-salt complexes and their structural characterization have been carried out by FTIR spectroscopic and XRD analyses. The room temperature ionic conductivity of the electrolyte composition 0.6PMMA-0.125(PC+DEC)-0.15LiClO4 (wt %) has been found to be maximum whose magnitude is 0.40×10-5 S/cm as determined by ac impedance analysis. The temperature dependent ionic conductivity of electrolyte sample0.6PMMA-0.125(PC+DEC)-0.15LiClO4 has further been investigated. Thermal analyses of electrolyte samples of all three compositions have also been done.

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Solid polymer electrolytes of blends of polyurethane and polyether modified polysiloxane and their ionic conductivity

Polymer ◽

10.1016/j.polymer.2010.04.038 ◽

2010 ◽

Vol 51 (12) ◽

pp. 2621-2628 ◽

Cited By ~ 58

Author(s):

Shanshan Wang ◽

Kyonsuku Min

Keyword(s):

Ionic Conductivity ◽

Polymer Electrolytes ◽

Solid Polymer Electrolytes ◽

Solid Polymer

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Development of the PEO Based Solid Polymer Electrolytes for All-Solid State Lithium Ion Batteries

Polymers ◽

10.3390/polym10111237 ◽

2018 ◽

Vol 10 (11) ◽

pp. 1237 ◽

Cited By ~ 39

Author(s):

Yu Jiang ◽

Xuemin Yan ◽

Zhaofei Ma ◽

Ping Mei ◽

Wei Xiao ◽

...

Keyword(s):

Solid State ◽

Lithium Ion Batteries ◽

Polymer Electrolytes ◽

High Performance ◽

Lithium Salt ◽

Rapid Development ◽

Lithium Ion ◽

Solid Polymer Electrolytes ◽

Solid Polymer ◽

Potential Candidate

Solid polymer electrolytes (SPEs) have attracted considerable attention due to the rapid development of the need for more safety and powerful lithium ion batteries. The prime requirements of solid polymer electrolytes are high ion conductivity, low glass transition temperature, excellent solubility to the conductive lithium salt, and good interface stability against Li anode, which makes PEO and its derivatives potential candidate polymer matrixes. This review mainly encompasses on the synthetic development of PEO-based SPEs (PSPEs), and the potential application of the resulting PSPEs for high performance, all-solid-state lithium ion batteries.

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