High-performance composite polymer membranes for solid-state lithium-metal batteries

Mir Mehraj Ud Din Mir Mehraj Ud Din, Susanne Maria Fischer, Eveline Kuhnert, Michael Häusler, Gregor Trimmel, Christian Slugovc, Daniel Rettenwander*

*Corresponding author for this work

Research output: Contribution to conferenceAbstractpeer-review


Ceramic-polymer composite electrolytes are among the strong contenders for the development of safe and high-energy density solid-state Li-metal batteries (SSLB). Current composite electrolytes suffer, however, from low conductivity and thermodynamic instability versus cathode materials. In order to overcome the current limitations, we report the preparation of electrolyte membranes based on lithium garnet (LLZO) nanowires synthesized via electrospinning technique, poly (ethylene oxide) (PEO) and a sulfonic-based plasticizer enabled with high Li-ion conductivity of 0.1 mS cm-1 at room temperature. The fabricated flexible membranes show improved electrochemical performances. For example, the cyclic voltammetry results confirm the electrochemical stability of the developed electrolyte membrane in a voltage window of 3 V to 5.5 V that potentially enables utilization of high voltage cathodes such as LiCoPO4. To extend, the electrochemical stability towards low voltage to enable the use of cathode materials operating in a larger or lower voltage range, we engineered the lithium metal surface by a thin layer of Li3N layer that stabilized the developed membranes down to 1.5 V. Integration of the developed electrolyte membranes with high specific capacity cathodes could potentially enable the next generation Li-metal batteries with high energy density.
Original languageEnglish
PagesMA2021-01 433
Number of pages1
Publication statusPublished - 30 May 2021
Event239th Electrochemical Society Meeting - Chicago, Virtuell, United States
Duration: 30 May 20213 Jun 2021


Conference239th Electrochemical Society Meeting
Abbreviated title239th ECS Meeting
Country/TerritoryUnited States
Internet address

Fields of Expertise

  • Advanced Materials Science

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