Enhanced solid‐state electrolytes made of lithium phosphorous oxynitride films

Ribeiro, J. F.; Sousa, R.; Carmo, J. P.; Gonçalves, L. M.; Silva, Maria Manuela; Correia, J. H.

doi:10.1016/j.tsf.2012.09.007

Cited by 20 publications

(20 citation statements)

References 20 publications

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“…This temperature-dependence trend for conductivity agrees well with experimental data [72]. It is good to note that reproducing the exact experimental value for conductivity is highly improbable as conductivity strongly depends on the film microstructure (shown in [72]). The simulation domain we use is finite with the size in the main conductivity direction of 61.2−91.8 nm, which corresponds to polycrystalline LiPON films, and the simulated conductivities are well within the limits of variations in experimental values for polycrystalline samples.…”

Section: Resultssupporting

confidence: 84%

Numerical Solution of 3D Poisson-Nernst-Planck Equations Coupled with Classical Density Functional Theory for Modeling Ion and Electron Transport in a Confined Environment

Meng

Zheng

Lin

et al. 2014

Commun. comput. phys.

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Abstract.We have developed efficient numerical algorithms for solving 3D steadystate Poisson-Nernst-Planck (PNP) equations with excess chemical potentials described by the classical density functional theory (cDFT). The coupled PNP equations are discretized by a finite difference scheme and solved iteratively using the Gummel method with relaxation. The Nernst-Planck equations are transformed into Laplace equations through the Slotboom transformation. Then, the algebraic multigrid method is applied to efficiently solve the Poisson equation and the transformed Nernst-Planck equations. A novel strategy for calculating excess chemical potentials through fast Fourier transforms is proposed, which reduces computational complexity from O(N 2 ) to O(Nlog N), where N is the number of grid points. Integrals involving the Dirac delta function are evaluated directly by coordinate transformation, which yields more accurate results compared to applying numerical quadrature to an approximated delta function. Numerical results for ion and electron transport in solid electrolyte for lithiumion (Li-ion) batteries are shown to be in good agreement with the experimental data and the results from previous studies. AMS subject classifications: 92C35, 35J47, 35J60, 35R09, 65M06, 65N55, 65T50

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Section: Resultssupporting

confidence: 84%

Numerical Solution of 3D Poisson-Nernst-Planck Equations Coupled with Classical Density Functional Theory for Modeling Ion and Electron Transport in a Confined Environment

Meng

Zheng

Lin

et al. 2014

Commun. comput. phys.

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“…Table shows the ionic conductivities for a typical solid‐state and organic electrolyte in addition to the experimental values obtained for the polymer gel. From this table it can be seen that all versions of the polymer gel offer significantly higher ionic conductivities than solid‐state LiPON . This trend is observed across the series of polymer gels (Table ).…”

Section: Resultsmentioning

confidence: 68%

Ionic Liquid Based Polymer Gel Electrolytes for Use with Germanium Thin Film Anodes in Lithium Ion Batteries

et al. 2019

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Thermally stable, flexible polymer gel electrolytes with high ionic conductivity are prepared by mixing the ionic liquid 1‐butyl‐1‐methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (C4mpyrTFSI), LiTFSI and poly(vinylidene difluoride‐co‐hexafluoropropylene (PVDF‐HFP). FT‐IR and Raman spectroscopy show that an amorphous film is obtained for high (60 %) C4mpyrTFSI contents. Thermogravimetric analysis (TGA) confirms that the polymer gels are stable below ∼300 °C in both nitrogen and air environments. Ionic conductivity of 1.9×10−3 S cm−2 at room temperature is achieved for the 60 % ionic liquid loaded gel. Germanium (Ge) anodes maintain a coulombic efficiency above 95 % after 90 cycles in potential cycling tests with the 60 % C4mpyrTFSI polymer gel.

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“…The most common cathode of a thin-film battery is lithium cobalt oxide (LiCoO 2 ) and the electrolyte is lithium phosphorus oxynitride (LiPON), both deposited by RF sputtering. Within the scope of the present research, extensive investigation have been developed in order to improved and achieve better characteristics for these two materials [4] [10].…”

Section: Batteries Working Principlementioning

confidence: 99%

All-solid-state batteries: An overview for bio applications

Sousa

Ribeiro

Sousa

et al. 2013

2013 IEEE 3rd Portuguese Meeting in Bioengineering (ENBENG)

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Batteries are crucial for most of bio applications. Batteries based on a liquid or polymer electrolyte needs a weight protective packaging which decreases their energy density and increases their size. This paper aims to identify, on the one hand, the efforts performed in thin-film batteries until now, and on the other hand, to provide an overview about the future perspectives in integration of batteries with flexible electronic circuits and energy harvesting systems. The overview highlights the need for an ongoing investigation that aims to replace metallic lithium anode of batteries through different approaches. Other materials, namely silicon or germanium, seem promising when combined with nanostructures. Three dimensional and integrated batteries will increase its volumetric capacity.

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Enhanced solid‐state electrolytes made of lithium phosphorous oxynitride films

Cited by 20 publications

References 20 publications

Numerical Solution of 3D Poisson-Nernst-Planck Equations Coupled with Classical Density Functional Theory for Modeling Ion and Electron Transport in a Confined Environment

Numerical Solution of 3D Poisson-Nernst-Planck Equations Coupled with Classical Density Functional Theory for Modeling Ion and Electron Transport in a Confined Environment

Ionic Liquid Based Polymer Gel Electrolytes for Use with Germanium Thin Film Anodes in Lithium Ion Batteries

All-solid-state batteries: An overview for bio applications

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