A reversible dendrite-free high-areal-capacity lithium metal electrode

Hui Wang (), Masaki Matsui, Hiroko Kuwata, Hidetoshi Sonoki, Yasuaki Matsuda, Xuefu Shang, Yasuo Takeda, Osamu Yamamoto and Nobuyuki Imanishi ()
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Hui Wang: Faculty of Engineering, Mie University
Masaki Matsui: Faculty of Engineering, Mie University
Hiroko Kuwata: Faculty of Engineering, Mie University
Hidetoshi Sonoki: Faculty of Engineering, Mie University
Yasuaki Matsuda: Faculty of Engineering, Mie University
Xuefu Shang: Faculty of Engineering, Mie University
Yasuo Takeda: Faculty of Engineering, Mie University
Osamu Yamamoto: Faculty of Engineering, Mie University
Nobuyuki Imanishi: Faculty of Engineering, Mie University

Nature Communications, 2017, vol. 8, issue 1, 1-9

Abstract: Abstract Reversible dendrite-free low-areal-capacity lithium metal electrodes have recently been revived, because of their pivotal role in developing beyond lithium ion batteries. However, there have been no reports of reversible dendrite-free high-areal-capacity lithium metal electrodes. Here we report on a strategy to realize unprecedented stable cycling of lithium electrodeposition/stripping with a highly desirable areal-capacity (12 mAh cm−2) and exceptional Coulombic efficiency (>99.98%) at high current densities (>5 mA cm−2) and ambient temperature using a diluted solvate ionic liquid. The essence of this strategy, that can drastically improve lithium electrodeposition kinetics by cyclic voltammetry premodulation, lies in the tailoring of the top solid-electrolyte interphase layer in a diluted solvate ionic liquid to facilitate a two-dimensional growth mode. We anticipate that this discovery could pave the way for developing reversible dendrite-free metal anodes for sustainable battery chemistries.

Date: 2017
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DOI: 10.1038/ncomms15106

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