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Issue 36, 2020
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Chemical prelithiation of Al for use as an ambient air compatible and polysulfide resistant anode for Li-ion/S batteries

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Abstract

Lithium-ion/sulfur (Li-ion/S) batteries consisting of metallic lithium-free anodes and sulfur cathodes are promising energy storage solutions. Anode prelithiation enables a Li-ion/S battery assembly with the extensively-developed sulfur cathodes. However, it's very challenging owing to the low lithiation potentials of anode materials (e.g. Al, 0.32 V vs. Li/Li+). Here, a free-standing LiAl alloy anode (c-LiAl) is prepared via an easy-to-implement chemical prelithiation, by using a newly exploited reagent of lithium 9,9-dimethylfluorene (Li-DiMF) with a lower redox potential of 0.22 V vs. Li/Li+. Compared with the LiAl anode prepared by electrochemical prelithiation (e-LiAl) and the lithium metal anode by electrodeposition (e-Li/Cu), c-LiAl displays a superior cyclability in the half cell test and high resistance towards polysulfide or ambient-air corrosion. When paired with a sulfur cathode, the resulting Li-ion/S battery with c-LiAl demonstrates a much better cycling performance than the Li-ion/S battery with e-LiAl and the lithium/sulfur battery with e-Li/Cu.

Graphical abstract: Chemical prelithiation of Al for use as an ambient air compatible and polysulfide resistant anode for Li-ion/S batteries

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Article information


Submitted
09 Jul 2020
Accepted
18 Aug 2020
First published
19 Aug 2020

J. Mater. Chem. A, 2020,8, 18715-18720
Article type
Paper

Chemical prelithiation of Al for use as an ambient air compatible and polysulfide resistant anode for Li-ion/S batteries

Y. Huang, C. Liu, F. Wei, G. Wang, L. Xiao, J. Lu and L. Zhuang, J. Mater. Chem. A, 2020, 8, 18715
DOI: 10.1039/D0TA06694J

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