Effect of Young's modulus of active materials on ion transport through solid electrolyte in all-solid-state lithium-ion battery

Ohashi, Akiyoshi; Kodama, Masafumi; Horikawa, Naoki; Hirai, Shuichiro

doi:10.1016/j.jpowsour.2020.229212

Cited by 25 publications

(21 citation statements)

References 24 publications

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“…The proportion of the LGPS decreases while the proportion of the NCMs increases up to a stack pressure of 12 MPa. In composites with different Young's moduli, large pressures can be applied to materials that have larger Young's moduli 23 . NCM particles are preferentially pushed into the measurement space.…”

Section: Resultsmentioning

confidence: 99%

“…The former is the fabrication pressure and the latter is the stack pressure. The parameters of the pressure have a direct effect on the void fraction in the composite electrode and change the apparent ionic conductivity [21][22][23] . Stack pressure is necessary to maintain proper contact between the electrode and the SE.…”

Section: Introductionmentioning

confidence: 99%

“…Analysis of the three-dimensional structure has been carried out using focused-ion-beam scanning electron microscopy (FIB-SEM) 15,26 and X-ray computed tomography (CT) 23,[27][28][29][30][31] . In particular, in X-ray CT, there is the advantage that operando measurement can be performed while changing the pressure or allowing electrochemical measurement to proceed.…”

Section: Introductionmentioning

confidence: 99%

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Stack pressure dependence on the three-dimensional structure of a composite electrode in an all-solid-state battery

Sakka

Yamashige

Takeuchi

et al. 2022

Preprint

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An all-solid-state battery in which the organic liquid electrolyte of a lithium-ion battery (LIB) is replaced with an inorganic solid electrolyte is a candidate for next-generation rechargeable batteries. Although the solid electrolyte has high conductivity, the charge and discharge characteristics are inferior to those of conventional LIBs. To achieve the high performance of all-solid-state batteries, it is necessary to grasp the phenomena peculiar to the composite electrode that uses the solid electrolyte. This study analyses the three-dimensional structure of the composite electrode in an all-solid-state battery using a laboratory-built cell capable of performing electrochemical and X-ray computed tomography (CT) measurements while monitoring stack pressures. The dependencies of stack pressure on the porosity, contact area, and tortuosity of the composite electrodes are quantitatively analysed to evaluate their effects on the electrochemical properties. The CT observation reveals that there is insufficient contact between the active material and the solid electrolyte in a plane perpendicular to the pressure direction. The contact interface is found to be a key parameter for the charge/discharge characteristics.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stack pressure dependence on the three-dimensional structure of a composite electrode in an all-solid-state battery

Sakka

Yamashige

Takeuchi

et al. 2022

Preprint

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“…2−4 Sulfide SEs can provide a good interparticle Li conduction path between SEs and electrode active materials because of their highly deformable property. 1,5,6 Therefore, many reports show relatively high performance of sulfide-type all-solid-state lithium-ion batteries. 1,4,7 On the other hand, oxide-type allsolid-state lithium-ion batteries show much lower battery performance, 1,8,9 in spite of there being many ionic conductive SEs for high conductivities above 10 −3 S cm −1 , such as NASICON, garnet, and perovskite.…”

Section: Introductionmentioning

confidence: 99%

“…The ionic conductivity of SEs and the preparation of Li and electron conduction pathways between particles are very important for improving the battery performance of all-solid-state lithium-ion batteries. Some sulfide SEs exhibit high ionic conductivities above 10 –2 S cm –1 , such as Li 10 GeP 2 S 12 , Li 7 P 3 S 11 , and Li 9.54 Si 1.74 P 1.44 S1 1.7 Cl 0.3 . − Sulfide SEs can provide a good interparticle Li conduction path between SEs and electrode active materials because of their highly deformable property. ,, Therefore, many reports show relatively high performance of sulfide-type all-solid-state lithium-ion batteries. ,, On the other hand, oxide-type all-solid-state lithium-ion batteries show much lower battery performance, ,, in spite of there being many ionic conductive SEs for high conductivities above 10 –3 S cm –1 , such as NASICON, garnet, and perovskite. − The reason considered is that these SEs have difficulty in providing a good Li conduction path between the electrode active materials and SEs because of their hardness. Recently, there have been reports of highly deformable oxide–glass SEs, which provide good interparticle contacts. − In particular, we reported that a cold-pressed pellet of 50Li 2 SO 4 –50Li 2 CO 3 glass exhibited a relative density above 99% and slight transparency without any specific void because of its excellent deformable properties.…”

Section: Introductionmentioning

confidence: 99%

Excellent Deformable Oxide Glass Electrolytes and Oxide-Type All-Solid-State Li₂S–Si Batteries Employing These Electrolytes

Nagata

Akimoto

2021

ACS Appl. Mater. Interfaces

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Oxide-type all-solid-state lithium-ion batteries have attracted great attention as a candidate for a next-generation battery with high safety performance. However, batteries based on oxide systems exhibit much lower energy densities and rate performances than liquid-type lithium-ion batteries, owing to the difficulty in preparing the ion-and electron-transfer path between particles. In this study, Li 2 SO 4 −Li 2 CO 3 −LiX (X = Cl, Br, and I) glass systems are investigated as highly deformable and high-ionic-conductive oxide electrolytes. These electrolytes show excellent deformable properties and better ionic conductivity. The LiI oxide glass system is a suitable electrolyte for the negative electrode because it shows a higher ionic conductivity and is stable up to 2.8 V. The LiCl or LiBr oxide glass systems are suitable electrolytes for the positive electrode and separation layer because they show high ionic conductivity and kinetic stability up to 3.2 V. The Li 2 S positive and Si negative composite electrodes employing LiBr and LiI oxide glass electrolytes, respectively, show high battery performances because of increased reaction points between active materials and the solid electrolyte and carbon via a mechanical milling process and are capable of forming good interparticle contact. Therefore, it suggests that the excellent deformable electrolytes are suitable for solid electrolytes in composite electrodes because their ionic conductivity does not change by the mechanical milling process. Furthermore, an oxide-type all-solid-state Li 2 S−Si full-battery cell employing these positive and negative composite electrodes and a LiBr oxide glass electrolyte separation layer is demonstrated. The full-battery cell indicates a relatively high discharge capacity of 740 mA h g −1 (Li 2 S) and an area capacity of 2.8 mA h cm −2 at 0.064 mA cm −2 and 45 °C despite using only safe oxide electrolytes.

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Interelectrode Talk in Solid‐State Lithium‐Metal Batteries

Zhang

Zheng

et al. 2023

Advanced Materials

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Solid‐state lithium‐metal batteries have been identified as a strategic research direction for the electric vehicle industry because of their promising high energy density and potential characteristic safety. However, the intrinsic mechanical properties of solid materials cause inevitable electro‐chemo‐mechanical failure of electrodes and electrolytes during charging and discharging; these failure mechanisms include lithium penetration and formation of cracks and voids, which pose a serious challenge for the long cycle life of solid‐state lithium‐metal batteries. Here, a short overview of the recent advances with a view to understand this challenge is provided. Furthermore, new insights into the cross‐talk behavior between the cathode and lithium‐metal anode are provided based on the non‐uniform Li+ flux inducing interactional electro‐chemo‐mechanical failure. Furthermore, guidelines for designing stable solid‐state lithium‐metal batteries and research directions to figure out the interelectrode‐talk‐related electro‐chemo‐mechanical failure mechanism are presented, which can be significant for accelerating the development of solid‐state lithium batteries.

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Effect of Young's modulus of active materials on ion transport through solid electrolyte in all-solid-state lithium-ion battery

Cited by 25 publications

References 24 publications

Stack pressure dependence on the three-dimensional structure of a composite electrode in an all-solid-state battery

Stack pressure dependence on the three-dimensional structure of a composite electrode in an all-solid-state battery

Excellent Deformable Oxide Glass Electrolytes and Oxide-Type All-Solid-State Li₂S–Si Batteries Employing These Electrolytes

Interelectrode Talk in Solid‐State Lithium‐Metal Batteries

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Effect of Young's modulus of active materials on ion transport through solid electrolyte in all-solid-state lithium-ion battery

Cited by 25 publications

References 24 publications

Stack pressure dependence on the three-dimensional structure of a composite electrode in an all-solid-state battery

Stack pressure dependence on the three-dimensional structure of a composite electrode in an all-solid-state battery

Excellent Deformable Oxide Glass Electrolytes and Oxide-Type All-Solid-State Li2S–Si Batteries Employing These Electrolytes

Interelectrode Talk in Solid‐State Lithium‐Metal Batteries

Contact Info

Product

Resources

About

Excellent Deformable Oxide Glass Electrolytes and Oxide-Type All-Solid-State Li₂S–Si Batteries Employing These Electrolytes