Scalable plasticized polymer electrolytes reinforced with surface-modified sepiolite fillers – A feasibility study in lithium metal polymer batteries

Mejía, Alberto; Shanmukaraj, Devaraj; Guzmán, Julio; Amo, Juan Miguel López del; García, Nuria; Rojo, Teófilo; Armand, Michel; Tiemblo, Pilar

doi:10.1016/j.jpowsour.2015.12.099

Cited by 41 publications

(40 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Many approaches such as the use of polymer blends as promising host matrices [13][14][15][16][17][18][19], inclusion of inorganic and organic nanofillers for improving thermal, mechanical, and ion transportation properties [20][21][22][23], the addition of various ionic liquid and/or dipolar liquid plasticizers for increasing degree of salt dissociation and reducing the crystallinity of polymer matrix [24][25][26][27], and consideration of different preparation methods suitable from the industrial point of view [28][29][30][31][32][33]. Furthermore, some combinations of these different approaches have also been taken into consideration for exploiting different kinds of SPE materials with a variety of appealing properties [17,20,26,34].…”

Section: Introductionmentioning

confidence: 99%

Dielectric polarization and relaxation processes of the lithium-ion conducting PEO/PVDF blend matrix-based electrolytes: effect of TiO2 nanofiller

Dhatarwal

Sengwa

2020

SN Appl. Sci.

View full text Add to dashboard Cite

The effect of TiO 2 nanofiller concentration on the dielectric polarization and relaxation processes of (75PEO/25PVDF)/25 wt% LiClO 4-x wt% TiO 2 (x = 0, 2, 5, 10, 15, and 20) compositions based nanocomposite solid polymer electrolyte (NSPE) films has been investigated by employing the dielectric relaxation spectroscopy. The SEM micrographs demonstrate that the dispersion of TiO 2 nanoparticles enormously alters the spherulitic morphology with the development of some cracks, pores, and wrinkles of these solution-cast prepared NSPE films. The X-ray diffraction study confirms that the heterostructures of these NSPE materials are semicrystalline and their degree of crystallinity increases irregularly with the increase of TiO 2 concentration, however the crystallinity of host polymer blend matrix of these electrolytes decreases. The complex dielectric permittivity spectra of these NSPE materials in the frequency range from 20 Hz to 1 MHz at 27 °C reveal that there is a dominant contribution of electrode polarization and interfacial polarization at lower frequencies, whereas the high frequency permittivity values attribute to dipolar and ionic polarizations. Four types of relaxation processes have been probed by the 'master curve representation' of the dielectric and electrical spectra of these solid ion-dipole complexes. It is observed that the addition of TiO 2 nanoparticles up to 10 wt% in these electrolytes influences the dielectric properties anomalously, but a huge decrease in the dielectric polarization and increase in the relaxation times are noted resulting in a significant decrease in the ionic conductivity of the film at 20 wt% TiO 2 concentration. The dependence of dc ionic conductivity of these lithium-ion conducting NSPE materials on the chain segmental relaxation time and also the degree of crystallinity has been explored. The results of these NSPE materials have also been compared with the TiO 2 nanoparticles loaded different polymer matrices and salts based electrolytes and discussed appropriately. These lithium-ion based electrolyte films are accredited for the solid-state ion-conducting energy storing devices from their electrochemical parameters characterized by LSV, CV, and CA techniques.

show abstract

Section: Introductionmentioning

confidence: 99%

Dielectric polarization and relaxation processes of the lithium-ion conducting PEO/PVDF blend matrix-based electrolytes: effect of TiO2 nanofiller

Dhatarwal

Sengwa

2020

SN Appl. Sci.

View full text Add to dashboard Cite

show abstract

“…[74,75] High ionic conductivity coexisting with high lithium ion transference number may lead to a reduction of polarization (resistance), and hence electrical performance can be enhanced. [76] Various strategies for polymer hosts have been introduced to improve the electrical properties of the SPEs, e. g. polymer-blends, [76][77][78][79][80] addition of fillers (e. g. Al 2 O 3 , TiO 2 ), [74,75,81,82] addition of plasticizers, [83][84][85] tuning macromolecular architectures (e. g. block copolymers, [86][87][88] graft copolymers, [89][90][91] polymer networks [92][93][94] ), or a combination of these strategies. [95][96][97] Efficient energy storage is the prerequisite for the switch from fossil fuels to electrically-powered vehicles, and discovery of new anode materials, cathode materials and electrolytes is anticipated for sustainable battery technology.…”

Section: Where May the Discipline Go In The Next 20-30 Years? What Armentioning

confidence: 99%

Quo Vadis, Macromolecular Science? Reflections by the IUPAC Polymer Division on the Occasion of the Staudinger Centenary

Abetz¹,

Chan

Luscombe

et al. 2020

Israel Journal of Chemistry

View full text Add to dashboard Cite

We survey the past, present and future of polymers and macromolecular science, both in general and giving specific examples from our diverse array of research backgrounds within polymer science and technology. As befitting our common bond, we pay some attention to the role of IUPAC. In line with this being part of a Rosarium philosophorum, one might say we conclude that it is Citius, Altius, Fortius for polymers in the century ahead, by which we mean “faster engagement, higher value, stronger properties”, and one should also add “longer usage”. In this way our broad community will continue to build on the century that has passed since Hermann Staudinger launched macromolecular science.

show abstract

“…The concept has been developed for Li electrolytes but is also valid for Na or other cations. The mechanical properties of these melt-compounded thermoplastic electrolytes are excellent and their electrochemistry very reasonable, as they eliminate dendrites [12] and show promising cyclability [13].…”

Section: Introductionmentioning

confidence: 99%

Solvent-Free and Scalable Procedure to Prepare PYR13TFSI/LiTFSI/PVDF–HFP Thermoplastic Electrolytes with Controlled Phase Separation and Enhanced Li Ion Diffusion

2019

Self Cite

View full text Add to dashboard Cite

Solid electrolytes for Li transport have been prepared by melt-compounding in one single step. Electrolytes are composed of polyvinylidene fluoride–hexafluoropropylene (PVDF–HFP) with PYR13TFSI on its own or with varying concentration of LiTFSI. While the extrusion of PVDF–HFP with PYR13TFSI is possible up to relatively high liquid fractions, the compatibility of PVDF–HFP with LiTFSI/PYR13TFSI solutions is much lower. An organo-modified sepiolite with D-α-tocopherol polyethylene glycol 1000 succinate (TPGS-S) can be used to enhance the compatibility of these blends and allows to prepare homogeneous PYR13TFSI/LiTFSI/PVDF–HFP electrolytes with controlled microphase separations by melt-compounding. The structure and morphology of the electrolytes has been studied by FTIR, differential scanning calorimetry (DSC), SEM, and AFM. Their mechanical properties have been studied by classical strain–stress experiments. Finally, ionic conductivity has been studied in the −50 to 90 °C temperature range and in diffusivity at 25 °C by PFG-NMR. These electrolytes prove to have a microphase-separated morphology and ionic conductivity which depends mainly on their composition, and a mechanical behavior typical of common thermoplastic polymers, which makes them very easy to handle. Then, in this solvent-free and scalable fashion, it is possible to prepare electrolytes like those prepared by solvent casting, but in few minutes instead of several hours or days, without solvent evaporation steps, and with ionic conductivities, which are very similar for the same compositions, above 0.1 mS·cm−1 at 25 °C. In addition, some of the electrolytes have been prepared with high concentration of Li ion, what has allowed the anion exchange Li transport mechanism to contribute significantly to the overall Li diffusivity, making DLi become similar and even clearly greater than DTFSI.

show abstract

Scalable plasticized polymer electrolytes reinforced with surface-modified sepiolite fillers – A feasibility study in lithium metal polymer batteries

Cited by 41 publications

References 19 publications

Dielectric polarization and relaxation processes of the lithium-ion conducting PEO/PVDF blend matrix-based electrolytes: effect of TiO2 nanofiller

Dielectric polarization and relaxation processes of the lithium-ion conducting PEO/PVDF blend matrix-based electrolytes: effect of TiO2 nanofiller

Quo Vadis, Macromolecular Science? Reflections by the IUPAC Polymer Division on the Occasion of the Staudinger Centenary

Solvent-Free and Scalable Procedure to Prepare PYR13TFSI/LiTFSI/PVDF–HFP Thermoplastic Electrolytes with Controlled Phase Separation and Enhanced Li Ion Diffusion

Contact Info

Product

Resources

About