Langmuir–Blodgett artificial solid-electrolyte interphases for practical lithium metal batteries

Mun Sek Kim, Ji-Hyun Ryu, Deepika, Young Rok Lim, In Wook Nah, Kwang-Ryeol Lee, Lynden A. Archer () and Won Cho ()
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Mun Sek Kim: Korea Institute of Science and Technology
Ji-Hyun Ryu: Korea Institute of Science and Technology
Deepika: Korea Institute of Science and Technology
Young Rok Lim: Korea Institute of Science and Technology
In Wook Nah: Korea Institute of Science and Technology
Kwang-Ryeol Lee: Korea Institute of Science and Technology
Lynden A. Archer: Cornell University
Won Cho: Korea Institute of Science and Technology

Nature Energy, 2018, vol. 3, issue 10, 889-898

Abstract: Abstract Practical lithium metal batteries require full and reversible utilization of thin metallic Li anodes. This introduces a fundamental challenge concerning how to create solid-electrolyte interphases (SEIs) that are able to regulate interfacial transport and protect the reactive metal, without adding appreciably to the cell mass. Here, we report on physicochemical characteristics of Langmuir–Blodgett artificial SEIs (LBASEIs) created using phosphate-functionalized reduced graphene oxides. We find that LBASEIs not only meet the challenges of stabilizing the Li anode, but can be facilely assembled in a simple, scalable process. The LBASEI derives its effectiveness primarily from its ability to form a durable coating on Li that regulates electromigration at the anode/electrolyte interface. In a first step towards practical cells in which the anode and cathode capacities are matched, we report that it is possible to achieve stable operations in both coin and pouch cells composed of a thin Li anode with the LBASEI and a high-loading intercalation cathode.

Date: 2018
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DOI: 10.1038/s41560-018-0237-6

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