Design principles for electrolytes and interfaces for stable lithium-metal batteries

Mukul D. Tikekar, Snehashis Choudhury, Zhengyuan Tu and Lynden A. Archer ()
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Mukul D. Tikekar: Sibley School of Mechanical and Aerospace Engineering, Cornell University
Snehashis Choudhury: Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University
Zhengyuan Tu: Cornell University
Lynden A. Archer: Robert Frederick Smith School of Chemical and Biomolecular Engineering, Cornell University

Nature Energy, 2016, vol. 1, issue 9, 1-7

Abstract: Abstract The future of electrochemical energy storage hinges on the advancement of science and technology that enables rechargeable batteries that utilize reactive metals as anodes. With specific capacity more than ten times that of the LiC6 anode used in present-day lithium-ion batteries, cells based on Li-metal anodes are of particular interest. Effective strategies for stabilizing the anode in such cells are now understood to be a requirement for progress on exceptional storage technologies, including Li–S and Li–O2 batteries. Multiple challenges—parasitic reactions of Li-metal with liquid electrolytes, unstable and dendritic electrodeposition, and dendrite-induced short circuits—derailed early efforts to commercialize such lithium-metal batteries. Here we consider approaches for rationally designing electrolytes and Li-metal/electrolyte interfaces for stable, dendrite-free operation of lithium-metal batteries. On the basis of fundamental understanding of the failure modes of reactive metal anodes, we discuss the key variables that govern the stability of electrodeposition at the Li anode and propose a universal framework for designing stable electrolytes and interfaces for lithium-metal batteries.

Date: 2016
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DOI: 10.1038/nenergy.2016.114

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