Journalartikel

Jahr der Veröffentlichung: 2016

Seiten: 6152-6165

Zeitschrift: Chemistry of Materials

Bandnummer: 28

Heftnummer: 17

ISSN: 0897-4756

eISSN: 1520-5002

DOI Link: https://doi.org/10.1021/acs.chemmater.6b02163

Verlag: American Chemical Society

Abstract: 
Rechargeable solid-state lithium ion batteries (SSLB) require fast ion conducting solid electrolytes (SEs) to enable high charge and discharge rates. Li7P3S11 is a particularly promising lithium solid electrolyte, exhibiting very high room temperature conductivities of up to 17 mS cm(-1) and high ductility, allowing fast ion transport through the bulk and intimate contact to high surface electrodes. Here we present a novel hot-press setup that facilitates the synthesis of solid electrolytes by combining in situ electrochemical impedance spectroscopy (EIS) with simultaneous temperature- and pressure-monitoring. While a high room temperature conductivity in the order of 10 mS.cm(-1) is readily achieved for phase pure Li7P3S11 with this design, it further enables monitoring of the different steps of crystallization from an amorphous Li2S-P2S5 glass to triclinic Li7P3S11. Nucleation, crystallization and at temperatures exceeding 280 degrees C-decomposition of the material are analyzed in real time, enabling process optimization. The results are supported ex situ by means of X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy and Raman spectroscopy. Proof-of-principle experiments show the promising cycling- and rate capability of Li0.3In0.7/Li7P3S11/S-composite all-solid-state batteries. It is furthermore presented that discharging below a limit of 1.2 V results in decomposition of the SE/cathode interface.

Harvard-Zitierstil: Busche, M., Weber, D., Schneider, Y., Dietrich, C., Wenzel, S., Leichtweiss, T., et al. (2016) In Situ Monitoring of Fast Li-Ion Conductor Li7P3S11 Crystallization Inside a Hot-Press Setup, Chemistry of Materials, 28(17), pp. 6152-6165. https://doi.org/10.1021/acs.chemmater.6b02163

APA-Zitierstil: Busche, M., Weber, D., Schneider, Y., Dietrich, C., Wenzel, S., Leichtweiss, T., Schröder, D., Zhang, W., Weigand, H., Walter, D., Sedlmaier, S., Houtarde, D., Nazar, L., & Janek, J. (2016). In Situ Monitoring of Fast Li-Ion Conductor Li7P3S11 Crystallization Inside a Hot-Press Setup. Chemistry of Materials. 28(17), 6152-6165. https://doi.org/10.1021/acs.chemmater.6b02163