Journal article

Authors list: Wei, Zhixuan; Singh, Dheeraj Kumar; Helmbrecht, Katharina; Sann, Joachim; Yusim, Yuriy; Kieser, Joy A; Glaser, Clarissa; Rohnke, Marcus; Gross, Axel; Janek, Jürgen

Publication year: 2023

Journal: Advanced Energy Materials

Volume number: 13

Issue number: 44

ISSN: 1614-6832

eISSN: 1614-6840

Open access status: Hybrid

DOI Link: https://doi.org/10.1002/aenm.202302525

Publisher: Wiley

Abstract: 

Secondary batteries using multivalent cations as ionic charge carriers have attracted increasing attention in recent years due to the high theoretical energy density provided by multi-electron redox reactions. However, the high charge density of these cations inevitably leads to sluggish kinetics of ion migration at room temperature, which poses a challenge for the development of solid-state batteries using multivalent ions. Here, a magnesium ion conducting hybrid solid electrolyte (HSE) is prepared, consisting of a new NASICON-structured material, Mg0.5Sn2(PO4)3, and a small amount of magnesium ionic liquid. The HSE shows superior room-temperature ionic conductivity of 1.11 x 10-4 S cm-1 and an activation energy of 0.36 eV. Due to the good compatibility of the HSE with the magnesium metal anode, symmetric Mg ǀHSE ǀMg cells show stable magnesium plating and stripping behavior at room temperature. Using in situ electrochemical scanning electron microscopy measurements, the room temperature growth-induced fracture of the HSE is observed, giving unequivocal evidence for magnesium deposition. These results may serve as a starting point for understanding the magnesium deposition mechanism on solid electrolytes in solid-state batteries.

Harvard Citation style: Wei, Z., Singh, D., Helmbrecht, K., Sann, J., Yusim, Y., Kieser, J., et al. (2023) In Situ Observation of Room-Temperature Magnesium Metal Deposition on a NASICON/IL Hybrid Solid Electrolyte, Advanced Energy Materials, 13(44), Article 2302525. https://doi.org/10.1002/aenm.202302525

APA Citation style: Wei, Z., Singh, D., Helmbrecht, K., Sann, J., Yusim, Y., Kieser, J., Glaser, C., Rohnke, M., Gross, A., & Janek, J. (2023). In Situ Observation of Room-Temperature Magnesium Metal Deposition on a NASICON/IL Hybrid Solid Electrolyte. Advanced Energy Materials. 13(44), Article 2302525. https://doi.org/10.1002/aenm.202302525