A1 Journal article (refereed)
Screen-Printed Composite LiFePO4-LLZO Cathodes Towards Solid-State Li-ion Batteries (2024)

Molaiyan, P., Välikangas, J., Sliz, R., Ramteke, D.D., Hu, T., Paolella, A., Fabritius, T., & Lassi, U. (2024). Screen-Printed Composite LiFePO4-LLZO Cathodes Towards Solid-State Li-ion Batteries. ChemElectroChem, Early View. https://doi.org/10.1002/celc.202400051

JYU authors or editors

Publication details

All authors or editors: Molaiyan, Palanivel; Välikangas, Juho; Sliz, Rafal; Ramteke, D. D.; Hu, Tao; Paolella, Andrea; Fabritius, Tapio; Lassi, Ulla

Journal or series: ChemElectroChem

ISSN: 2196-0216

eISSN: 2196-0216

Publication year: 2024

Publication date: 11/03/2024

Volume: Early View

Publisher: Wiley-VCH Verlag

Publication country: Germany

Publication language: English

DOI: https://doi.org/10.1002/celc.202400051

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/94026

Abstract

LiFePO4 (LFP) is widely used as cathode material for its low cost, high safety, and good thermal properties. It is one of the most exploited cathode materials for commercial Li-ion batteries (LIBs). Herein, we present a screen-printing method to prepare a LFP composite cathode, and a rational combination of the typical composite solid electrolytes (CSE) consisting of polyethylene oxide (PEO)/Li-salt (LiTFSi) electrolyte with ceramic filler (LLZO or Li6.4La3Zr1.4Ta0.6O12 (LLZTO)) has been successfully demonstrated for SSB. The prepared CSE offers: i) a promising ionic conductivity (0.425 mS cm−1 at 60 °C), ii) a wide electrochemical window (>4.6 V), iii) a high Li-ion transference number (tLi+=0.44), iv) a good interfacial compatibility with the electrode, v) a good thermal stability, and vi) a high chemical stability toward Li metal anode. The Li/CSE/Li symmetric cells can be cycled for more than 1000 h without Li-dendrites growth at a current density of 0.2 mA cm−2. The final cell screen-printed LFP composite cathode (LFP+LLZO)//Li metal displays a high reversible specific capacity of 140 mAh g−1 (0.1 C) and 50 mAh g−1 (0.5 C) after 1st and 500th cycles.

Keywords: lithium-ion batteries; electrodes; composites; electrochemistry

Contributing organizations

Ministry reporting: Yes

Reporting Year: 2024

Preliminary JUFO rating: 1