X-ray Stress Analysis in Textured Polycrystalline Materials

Yokoyama, Ryouichi; Harada, J.

doi:10.5940/jcrsj.52.113

Cited by 1 publication

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This approximation relates the single‐crystal elastic constants to the polycrystalline elastic moduli. [ 55 ] The Voigt (V) moduli provide an upper bound to these values, the Reuss (R) moduli provides a lower bound, and the Hill (H) moduli is the arithmetic average of the two. The bulk B and shear modulus G within these approximations are defined as

\begin{matrix} B_{V} = \frac{(C_{11} + C_{22} + C_{33} + 2 (C_{12} + C_{23} + C_{31}))}{9} \end{matrix}

\begin{matrix} B_{R} = \frac{1}{(S_{11} + S_{22} + S_{33} + 2 (S_{12} + S_{23} + S_{31}))} \end{matrix}

\begin{matrix} B_{H} = \frac{(B_{V} + B_{R})}{2} \end{matrix}

\begin{matrix} G_{V} = \frac{(C_{11} + C_{22} + C_{33} - C_{12} - C_{23} - C_{31} + 3 (C_{44} + C_{55} + C_{66}))}{15} \end{matrix}

\begin{matrix} G_{R} = \frac{15}{(4 (S_{11} ...))} \end{matrix}

…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Correlating Macro and Atomic Structure with Elastic Properties and Ionic Transport of Glassy Li₂S‐P₂S₅ (LPS) Solid Electrolyte for Solid‐State Li Metal Batteries

Garcia‐Mendez

Smith

Neuefeind

et al. 2020

Advanced Energy Materials

View full text Add to dashboard Cite

all-solid-state batteries (ASSBs). [1] ASSBs have garnered interest since they offer the potential for improved safety and energy density compared to lithium-ion batteries. To realize these advantages, the nonflammable solid electrolyte would replace the flammable liquid electrolyte and Li metal would replace carbon anodes to reduce cell volume and weight. [2] As a result, about 100% higher energy densities could be achieved compared to conventional Li-ion batteries. [3,4] Sulfide-based electrolytes with adequate ionic conductivity, low interfacial resistance against electrodes, and low processing cost make them one of the most promising inorganic solid electrolyte materials that could enable ASSBs. [5] However, despite the development of different compositions through different synthesis techniques in the Li 2 S-P 2 S 5 (LPS) family, [6][7][8][9][10] the successful transition to Li metal with relevant charging rates (≥3 mA cm −2 at room temperature) has not been realized. It has been reported that microstructural defects, such as grain boundaries and/or pores can play a role in determining the maximum charging rate (or critical current density, CCD) a solid electrolyte can withstand without Li penetration. [11,12] Thus, a glassy, dense microstructure may be preferred for ASSB applications. In previous work, [13] the densification behavior or LPS 75-25 was studied as a function of temperature (25-300 °C) at fixed pressure (47 MPa). It was determined that crystallization of the thio-LiSICON III analog phase occurred between 170 and 250 °C. Moreover, the relative density was more or less invariant of densification temperature (≈80% RD; calculated dividing the geometrical density by its theoretical density in the amorphous phase: 1.88 g cm −3 ). [14] While in our previous study, the maximum hot-pressing pressure (47 MPa) was limited by the mechanical integrity of the molding die, we recently developed capabilities to increase pressure to achieve 360 MPa. With this new capability, the current study compliments our previous study by investigating the densification behavior of LPS 75-25 as a function of pressure at fixed temperature. The pressure ranged between 47 and 360 MPa and the temperature was fixed at the glass transition temperature (T glass ). We hypothesize that by increasing the molding pressure the relative density will increase. Furthermore, the simultaneous application of A combination of high ionic conductivity and facile processing suggest that sulfide-based materials are promising solid electrolytes that have the potential to enable Li metal batteries. Although the Li 2 S-P 2 S 5 (LPS) family of compounds exhibit desirable characteristics, it is known that Li metal preferentially propagates through microstructural defects, such as particle boundaries and/ or pores. Herein, it is demonstrated that a near theoretical density (98% relative density) LPS 75-25 glassy electrolyte exhibiting high ionic conductivity can be achieved by optimizing the molding pressure and temperature. The optimal molding pressur...

show abstract

\begin{matrix} B_{V} = \frac{(C_{11} + C_{22} + C_{33} + 2 (C_{12} + C_{23} + C_{31}))}{9} \end{matrix}

\begin{matrix} B_{R} = \frac{1}{(S_{11} + S_{22} + S_{33} + 2 (S_{12} + S_{23} + S_{31}))} \end{matrix}

\begin{matrix} B_{H} = \frac{(B_{V} + B_{R})}{2} \end{matrix}

\begin{matrix} G_{V} = \frac{(C_{11} + C_{22} + C_{33} - C_{12} - C_{23} - C_{31} + 3 (C_{44} + C_{55} + C_{66}))}{15} \end{matrix}

\begin{matrix} G_{R} = \frac{15}{(4 (S_{11} ...))} \end{matrix}

…”

Section: Methodsmentioning

confidence: 99%

“…The Voight‐Reuss‐Hill approximation is ideal for an amorphous material since the approach averages all methods over all possible lattice orientations. [ 55 ] Given that there is no directionality in amorphous materials, this approach is best suited for LPS in this work.…”

Section: Methodsmentioning

confidence: 99%

Correlating Macro and Atomic Structure with Elastic Properties and Ionic Transport of Glassy Li₂S‐P₂S₅ (LPS) Solid Electrolyte for Solid‐State Li Metal Batteries

Garcia‐Mendez

Smith

Neuefeind

et al. 2020

Advanced Energy Materials

View full text Add to dashboard Cite

show abstract

X-ray Stress Analysis in Textured Polycrystalline Materials

Cited by 1 publication

References 12 publications

Correlating Macro and Atomic Structure with Elastic Properties and Ionic Transport of Glassy Li₂S‐P₂S₅ (LPS) Solid Electrolyte for Solid‐State Li Metal Batteries

Correlating Macro and Atomic Structure with Elastic Properties and Ionic Transport of Glassy Li₂S‐P₂S₅ (LPS) Solid Electrolyte for Solid‐State Li Metal Batteries

Contact Info

Product

Resources

About

X-ray Stress Analysis in Textured Polycrystalline Materials

Cited by 1 publication

References 12 publications

Correlating Macro and Atomic Structure with Elastic Properties and Ionic Transport of Glassy Li2S‐P2S5 (LPS) Solid Electrolyte for Solid‐State Li Metal Batteries

Correlating Macro and Atomic Structure with Elastic Properties and Ionic Transport of Glassy Li2S‐P2S5 (LPS) Solid Electrolyte for Solid‐State Li Metal Batteries

Contact Info

Product

Resources

About

Correlating Macro and Atomic Structure with Elastic Properties and Ionic Transport of Glassy Li₂S‐P₂S₅ (LPS) Solid Electrolyte for Solid‐State Li Metal Batteries

Correlating Macro and Atomic Structure with Elastic Properties and Ionic Transport of Glassy Li₂S‐P₂S₅ (LPS) Solid Electrolyte for Solid‐State Li Metal Batteries