Lithium garnet oxide dispersed polymer composite membrane for rechargeable lithium batteries

Buvana, P.; Vishista, K.; Shanmukaraj, Devaraj; Murugan, Ramaswamy

doi:10.1007/s11581-016-1830-y

Cited by 10 publications

(14 citation statements)

References 36 publications

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“…This means that the main charge carriers in the GPE samples were ionic (Na + cations and I − anions from NaI salt) rather than electronic. A linear line was observed in the low‐frequency region; this resulted from the creation of charges because of the polarization at the interface between the electrolyte and electrode . The R b values of the GPE samples were obtained from an intercept of a linear line with the real axis in the Cole–Cole plot at high frequency.…”

Section: Resultsmentioning

confidence: 99%

“…A linear line was observed in the low-frequency region; this resulted from the creation of charges because of the polarization at the interface between the electrolyte and electrode. 27,28 The R b values of the GPE samples were obtained from an intercept of a linear line with the real axis in the Cole-Cole plot at high frequency. Figure 2 shows that the R b values of the GPEs decreased with increasing NaI salt con- We confirmed that with the addition of more salt into the host polymer, more free ions existed in the GPE samples, and this could lead to an enhancement in their σ.…”

Section: Eis Studies Of the Developed Gpe Samplesmentioning

confidence: 99%

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Polyacrylonitrile–poly(1‐vinyl pyrrolidone‐co‐vinyl acetate) blend based gel polymer electrolytes incorporated with sodium iodide salt for dye‐sensitized solar cell applications

Saidi

Omar

et al. 2019

J of Applied Polymer Sci

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New gel polymer electrolytes (GPEs) were prepared via the blending of a polyacrylonitrile polymer and a poly(1‐vinyl pyrrolidone‐co‐vinyl acetate) copolymer. The sodium iodide (NaI) salt concentration was varied for each GPE sample. From ionic conductivity (σ) studies, we observed that the sample with a 40 wt % NaI salt content (N40) showed the highest σ of 3.54 × 10−3 ± 0.05 S/cm at room temperature, and all of the GPE samples obeyed Arrhenius behavior. The dielectric properties of the GPE samples were also analyzed to study the electrical polarization of the materials. The developed GPE samples were also characterized with X‐ray diffraction and Fourier transform infrared spectroscopy. We also then used the developed GPE samples for the fabrication of dye‐sensitized solar cells by sandwiching them between a photoanode and Pt counter electrode for photovoltaic studies. The highest photovoltaic performance was achieved by N40, with an efficiency of 3.04%. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47810.

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Section: Resultsmentioning

confidence: 99%

Section: Eis Studies Of the Developed Gpe Samplesmentioning

confidence: 99%

Polyacrylonitrile–poly(1‐vinyl pyrrolidone‐co‐vinyl acetate) blend based gel polymer electrolytes incorporated with sodium iodide salt for dye‐sensitized solar cell applications

Saidi

Omar

et al. 2019

J of Applied Polymer Sci

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“…[3] Several studies have been performed concerning the influence of the weight fraction of LLZO, some finding an improvement and others showing a decrease of the ionic conductivity via LLZO addition. [4][5][6][7][8][9][10] An overview of the compositions and the ionic conductivities of the hybrid electrolytes and-if available-corresponding polymer electrolytes is given in Table 1. Choi et al, for example, found the peak ionic conductivity at a ceramic content of 52.5 wt.% using tetragonal LLZO.…”

Section: Introductionmentioning

confidence: 99%

“…The discrepancy is probably caused by the difference in the molecular weights of PEO or by slight deviations in the processing of the films. [5,8] Next to the discussed parameters, the interfacial properties of the compounds used in hybrid electrolytes significantly influence their performance. [2,10,13] Lewis acid-base interactions of LLZO with PEO and TFSImay lead to a higher mobility of lithium.…”

Section: Introductionmentioning

confidence: 99%

Polyethylene oxide‐Li_6.5La₃Zr_1.5Ta_0.5O₁₂ hybrid electrolytes: Lithium salt concentration and biopolymer blending

Wirtz

Linhorst

Veelken

et al. 2020

Electrochemical Science Adv

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Hybrid electrolytes are developed to meet the requirements of safety, performance, and manufacturing for electrolytes suitable for Li-ion batteries with Li-anodes. Recent challenges-in addition to these key properties-emphasize the importance of sustainability. While compromising between these three objectives, the currently available materials are still well below the targeted goals. Three important issues for the design of hybrid electrolytes are (i) the role of the morphology and surface state of the ceramic particles in the polymer matrix, (ii) the dependence of salt concentration and ionic conductivity and, (iii) the effects of substituting part of the polyethylene oxide (PEO), with biopolymers. Electrolyte films were prepared from PEO, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 (LLZO:Ta), and biopolymers with varying contents of these components by a solution casting method. The films were analyzed with respect to structural and microstructural characteristics by DSC, Raman spectroscopy, and SEM. Ionic conductivity was evaluated by electrochemical impedance spectroscopy. Most interesting, when comparing films with LLZO:Ta versus without, the content of LiTFSI required for the maximum conductivity in the respective systems is different: a higher LiTFSI concentration is required for the former type. Overall, addition of LLZO:Ta as well as partial substitution of PEO by chitosan mesylate or cellulose acetate decrease the ionic conductivity. Thus-at least in the present approaches-a loss in performance is the drawback from attempts to enhance the safety by LLZO:Ta additions and sustainability by biopolymer blending of hybrid electrolytes.

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“…The typical approach to prepare ceramic‐polymer composites is based on mixing the two materials and tape casting the composite slurry, which results in a flexible membrane with ceramic particles dispersed in a polymer matrix (Figure A). However, the noncontiguous network of ceramic particles forces the lithium ions to diffuse through the polymer matrix, limiting the overall ionic conductivity . To benefit from the high ionic conductivity of the ceramic, new composite architectures, providing a percolative ceramic network, need to be designed.…”

Section: Introductionmentioning

confidence: 99%

Dense freeze‐cast Li₇La₃Zr₂O₁₂ solid electrolytes with oriented open porosity and contiguous ceramic scaffold

et al. 2018

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Freeze casting is used for the first time to prepare solid electrolyte scaffolds with oriented porosity and dense ceramic walls made of Li 7 La 3 Zr 2 O 12 (LLZO), one of the most promising candidates for solid state battery electrolytes. Processing parameters -such as solvent solidification rate, solvent type, and ceramic particle size -are investigated, focusing on their influence on porosity and ceramic wall density. Dendrite-like porosity is obtained when using cyclohexane and dioxane as solvents. Lamellar porosity is observed in aqueous slurries resulting in a structure with the highest apparent porosity and densest ceramic scaffold but weakest mechanical properties due to the lack of interlamellar support. The use of smaller LLZO particle size in the slurries resulted in lower porosity and denser ceramic walls. The intrinsic ionic conductivity of the oriented LLZ ceramic scaffold is unaffected by the freeze casting technique, providing a promising ceramic scaffold for polymer infill in view of designing new types of ceramic-polymer composites.

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Lithium garnet oxide dispersed polymer composite membrane for rechargeable lithium batteries

Cited by 10 publications

References 36 publications

Polyacrylonitrile–poly(1‐vinyl pyrrolidone‐co‐vinyl acetate) blend based gel polymer electrolytes incorporated with sodium iodide salt for dye‐sensitized solar cell applications

Polyacrylonitrile–poly(1‐vinyl pyrrolidone‐co‐vinyl acetate) blend based gel polymer electrolytes incorporated with sodium iodide salt for dye‐sensitized solar cell applications

Polyethylene oxide‐Li_6.5La₃Zr_1.5Ta_0.5O₁₂ hybrid electrolytes: Lithium salt concentration and biopolymer blending

Dense freeze‐cast Li₇La₃Zr₂O₁₂ solid electrolytes with oriented open porosity and contiguous ceramic scaffold

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Lithium garnet oxide dispersed polymer composite membrane for rechargeable lithium batteries

Cited by 10 publications

References 36 publications

Polyacrylonitrile–poly(1‐vinyl pyrrolidone‐co‐vinyl acetate) blend based gel polymer electrolytes incorporated with sodium iodide salt for dye‐sensitized solar cell applications

Polyacrylonitrile–poly(1‐vinyl pyrrolidone‐co‐vinyl acetate) blend based gel polymer electrolytes incorporated with sodium iodide salt for dye‐sensitized solar cell applications

Polyethylene oxide‐Li6.5La3Zr1.5Ta0.5O12 hybrid electrolytes: Lithium salt concentration and biopolymer blending

Dense freeze‐cast Li7La3Zr2O12 solid electrolytes with oriented open porosity and contiguous ceramic scaffold

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Product

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Polyethylene oxide‐Li_6.5La₃Zr_1.5Ta_0.5O₁₂ hybrid electrolytes: Lithium salt concentration and biopolymer blending

Dense freeze‐cast Li₇La₃Zr₂O₁₂ solid electrolytes with oriented open porosity and contiguous ceramic scaffold