Favorable composite electrodes for all-solid-state batteries

Sakuda, Atsushi

doi:10.2109/jcersj2.18114

Cited by 26 publications

(15 citation statements)

References 67 publications

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“…Kato et al have produced a solid state battery with 15.7 mAh cm −2 at room temperature using a cathode layer with a thickness of 600 µm, which is more than twice the maximum thickness in our study [17]. Currently, most solid state battery prototypes use thinner composite electrodes to compensate for the lower ionic conductivity of the electrode material and the absence of electrolytes wetting the electrode [18].…”

Section: Role Of the Electrolytementioning

confidence: 68%

Thermal Gradients with Sintered Solid State Electrolytes in Lithium-Ion Batteries

Bock

Onsrud²,

Karoliussen

et al. 2020

Energies

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The electrolyte is one of the three essential constituents of a Lithium-Ion battery (LiB) in addition to the anode and cathode. During increasingly high power and high current charging and discharging, the requirement for the electrolyte becomes more strict. Solid State Electrolyte (SSE) sees its niche for high power applications due to its ability to suppress concentration polarization and otherwise stable properties also related to safety. During high power and high current cycling, heat management becomes more important and thermal conductivity measurements are needed. In this work, thermal conductivity was measured for three types of solid state electrolytes: Li 7 La 3 Zr 2 O 12 (LLZO), Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP), and Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 (LATP) at different compaction pressures. LAGP and LATP were measured after sintering, and LLZO was measured before and after sintering the sample material. Thermal conductivity for the sintered electrolytes was measured to 0.470 ± 0.009 WK − 1 m − 1 , 0.5 ± 0.2 WK − 1 m − 1 and 0.49 ± 0.02 WK − 1 m − 1 for LLZO, LAGP, and LATP respectively. Before sintering, LLZO showed a thermal conductivity of 0.22 ± 0.02 WK − 1 m − 1 . An analytical temperature distribution model for a battery stack of 24 cells shows temperature differences between battery center and edge of 1–2 K for standard liquid electrolytes and 7–9 K for solid state electrolytes, both at the same C-rate of four.

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Section: Role Of the Electrolytementioning

confidence: 68%

Thermal Gradients with Sintered Solid State Electrolytes in Lithium-Ion Batteries

Bock

Onsrud²,

Karoliussen

et al. 2020

Energies

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“…The electrolytes were peeled from the glass plates using a razor blade and pressed in a hydraulic press before use. Complete removal of the DMF solvent was confirmed by 1…”

Section: ■ Conclusionmentioning

confidence: 99%

“…Solid-state electrolytes (SSEs) are considered the next generation of electrolytes for lithium-based rechargeable batteries owing to their increased safety and potentially energy density relative to commercial liquid electrolytes. 1 SSEs are promising to enable lithium metal anodes because of their theoretical ability to suppress dendrites without the need for an additional polymer-based separator. The focus of the SSE research has shifted recently from identifying ionically conductive materials to scaling solid-state batteries (SSBs).…”

Section: ■ Introductionmentioning

confidence: 99%

Investigating the Cyclability and Stability at the Interfaces of Composite Solid Electrolytes in Li Metal Batteries

Holmes

Liu

Zhang

et al. 2022

ACS Appl. Mater. Interfaces

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Despite the fact that much work has been dedicated to finding the ideal additive for composite solid electrolytes (CSEs) for lithium-based solid-state batteries, little is known about the properties of a CSE that enable stable cycling with a lithium metal anode. In this work, we use three CSEs based on lithium nitride (Li 3 N), a fast lithium-ion conductor, and lithium hydroxide (LiOH) to investigate the properties and interfacial interactions that impact the cyclability of CSEs. We present a method for stabilizing Li 3 N with a shell of LiOH, and we incorporate Li 3 N, core−shell particles, and LiOH into CSEs using polyethylene oxide (PEO) and lithium bis(trifluoromethanesulfonyl)imide. Through improved interfacial chemistry, CSEs with core−shell particles have superior electrochemical cycling performance compared to those with unprotected Li 3 N in symmetric Li−Li cells. This CSE features a high ionic conductivity of 0.66 mS cm −1 at 60 °C, a high critical current density of 1.2 mA cm −2 , and a wide voltage window of 0−5.1 V. Full cells with the core−shell CSE and lithium iron phosphate cathodes exhibit stable cycling and high reversible specific capacities in cells as high as 2.5 mAh cm −2 . We report that the improved ionic conductivity and amorphous PEO content have a limited effect on the solid-state electrolyte performance, while improving the electrolyte−Li metal anode interface is key to cycling longevity.

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“…2. The advantages of using all-solid-state batteries are as follows; 28) 1. No risk of ignition and leakage of electrolytes 2.…”

confidence: 99%

Ionic conduction of glasses and their potential applications

Daiko

Sakuda²,

Honma

et al. 2022

J. Ceram. Soc. Japan

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Materials with high ionic conductivity are attracting a great deal of attention because they are indispensable for improving the performance of batteries, sensors, and capacitors. Solid electrolytes, in particular, have a potential to compensate for the shortcomings of liquid electrolytes, and are the subject of intense research and development worldwide. One of the big characteristics of glass is its high formability. Here we are focusing on glasselectrolytes. Differences between "superionic conductive glasses" and "ordinary glasses", as well as the mixed alkali effect will be overviewed. In addition, glasses can retain large residual stress inside that can reach the order of several GPa depending on the cooling conditions. These residual stresses also affect ionic conductivity. Recent results on the application of glass formability and softening fluidity to the formation of interfaces in allsolid-state batteries, and to ion emission from sharpened glasses are reviewed.

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Favorable composite electrodes for all-solid-state batteries

Cited by 26 publications

References 67 publications

Thermal Gradients with Sintered Solid State Electrolytes in Lithium-Ion Batteries

Thermal Gradients with Sintered Solid State Electrolytes in Lithium-Ion Batteries

Investigating the Cyclability and Stability at the Interfaces of Composite Solid Electrolytes in Li Metal Batteries

Ionic conduction of glasses and their potential applications

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