Abstract
All-solid-state lithium-ion batteries (ASLBs) using solid electrolytes are attractive for applications in demand of high energy and power. In addition, they are superior compared to conventional lithium-ion batteries (LIBs) with liquid electrolytes regarding increased safety and long cycle life. Promising materials for achieving the increased performance are sulfide solid electrolytes (SEs) which are able to support high ionic conductivities (>10-3 S cm-1).1 A major challenge for these ASLBs is electrode processing. The inability of solid electrolytes to penetrate into the pores of the electrodes and act as ionic conductor between active material particles puts great focus on electrode formulations and methods to incorporate the solid electrolyte into the electrode. Conventional wet chemical processing can lead to unwanted side reactions between the sulfide electrolyte and commonly used polar solvents.2
Therefore, a more promising approach is the so-called infiltration process, for which conventional electrodes using standard slurry coating methods are prepared and in another step the sulfide electrolytes are infiltrated into the pores of these electrodes.3 Although this method is already reported in literature, there are still open questions related to the fabrication process: The morphology of the sulfide electrolytes after infiltration, their chemical stability with common binder materials, how to increase the penetration depth of the infiltrated electrolyte into the electrodes, etc. In this work, challenges of the infiltration process are presented using LiNbO3-coated NCM811 electrodes and Li6PS5Cl electrolyte. Furthermore, the effect of co-solvents and additives on the morphology of the infiltrated electrolytes and on the electrochemical performance of the resulting composite electrodes is investigated.
References:
1 T. Inoue, K. Mukai. ACS Appl. Mater. Interfaces 2017, 9, 1507–1515.
2 D.Y. Oh, Y.J. Nam, K.H. Park, S.H. Jung, S.-J. Cho, Y.K. Kim, Y.-G. Lee, S.-Y. Lee, Y.S. Jung. Adv. Energy Mater. 2015, 5, 1500865.
3 D.H. Kim, D.Y. Oh, K.H. Park, Y.E. Choi, Y.J. Nam, H.A. Lee, S.-M. Lee, Y.S. Jung. Nano Lett. 2017, 17, 3013–3020.
Therefore, a more promising approach is the so-called infiltration process, for which conventional electrodes using standard slurry coating methods are prepared and in another step the sulfide electrolytes are infiltrated into the pores of these electrodes.3 Although this method is already reported in literature, there are still open questions related to the fabrication process: The morphology of the sulfide electrolytes after infiltration, their chemical stability with common binder materials, how to increase the penetration depth of the infiltrated electrolyte into the electrodes, etc. In this work, challenges of the infiltration process are presented using LiNbO3-coated NCM811 electrodes and Li6PS5Cl electrolyte. Furthermore, the effect of co-solvents and additives on the morphology of the infiltrated electrolytes and on the electrochemical performance of the resulting composite electrodes is investigated.
References:
1 T. Inoue, K. Mukai. ACS Appl. Mater. Interfaces 2017, 9, 1507–1515.
2 D.Y. Oh, Y.J. Nam, K.H. Park, S.H. Jung, S.-J. Cho, Y.K. Kim, Y.-G. Lee, S.-Y. Lee, Y.S. Jung. Adv. Energy Mater. 2015, 5, 1500865.
3 D.H. Kim, D.Y. Oh, K.H. Park, Y.E. Choi, Y.J. Nam, H.A. Lee, S.-M. Lee, Y.S. Jung. Nano Lett. 2017, 17, 3013–3020.
Originalsprache | Englisch |
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Publikationsstatus | Veröffentlicht - 6 Juni 2022 |
Veranstaltung | Power our Future 2022 - Europa Congress Palace in Vitoria-Gasteiz, at Avenida Gasteiz, 85., Vitoria-Gasteiz, Spanien Dauer: 5 Juli 2022 → 8 Juli 2022 https://cicenergigune.com/en/agenda/power-our-future-2022 |
Konferenz
Konferenz | Power our Future 2022 |
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Land/Gebiet | Spanien |
Stadt | Vitoria-Gasteiz |
Zeitraum | 5/07/22 → 8/07/22 |
Internetadresse |
Research Field
- Nicht definiert