Solid-state polymer electrolytes for high-performance lithium metal batteries

Snehashis Choudhury, Sanjuna Stalin, Duylinh Vu, Alexander Warren, Yue Deng, Prayag Biswal and Lynden A. Archer ()
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Snehashis Choudhury: Cornell University
Sanjuna Stalin: Cornell University
Duylinh Vu: Cornell University
Alexander Warren: Cornell University
Yue Deng: Cornell University
Prayag Biswal: Cornell University
Lynden A. Archer: Cornell University

Nature Communications, 2019, vol. 10, issue 1, 1-8

Abstract: Abstract Electrochemical cells based on alkali metal anodes are receiving intensive scientific interest as potentially transformative technology platforms for electrical energy storage. Chemical, morphological, mechanical and hydrodynamic instabilities at the metal anode produce uneven metal electrodeposition and poor anode reversibility, which, are among the many known challenges that limit progress. Here, we report that solid-state electrolytes based on crosslinked polymer networks can address all of these challenges in cells based on lithium metal anodes. By means of transport and electrochemical analyses, we show that manipulating thermodynamic interactions between polymer segments covalently anchored in the network and “free” segments belonging to an oligomeric electrolyte hosted in the network pores, one can facilely create hybrid electrolytes that simultaneously exhibit liquid-like barriers to ion transport and solid-like resistance to morphological and hydrodynamic instability.

Date: 2019
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DOI: 10.1038/s41467-019-12423-y

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