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ACS Nano. 2014 Oct 28;8(10):10963-72. doi: 10.1021/nn505480w. Epub 2014 Oct 16.

Vapor-phase atomic-controllable growth of amorphous Li2S for high-performance lithium-sulfur batteries.

Author information

1
Energy Systems Division and ‡Chemical Sciences and Engineering Division, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States.

Abstract

Lithium-sulfur (Li-S) batteries hold great promise to meet the formidable energy storage requirements of future electrical vehicles but are prohibited from practical implementation by their severe capacity fading and the risks imposed by Li metal anodes. Nanoscale Li(2)S offers the possibility to overcome these challenges, but no synthetic technique exists for fine-tailoring Li(2)S at the nanoscale. Herein we report a vapor-phase atomic layer deposition (ALD) method for the atomic-scale-controllable synthesis of Li(2)S. Besides a comprehensive investigation of the ALD Li(2)S growth mechanism, we further describe the high performance of the resulting amorphous Li(2)S nanofilms as cathodes in Li-S batteries, achieving a stable capacity of ∼ 800 mA · h/g, nearly 100% Coulombic efficiency, and excellent rate capability. Nanoscale Li(2)S holds great potential for both bulk-type and thin-film high-energy Li-S batteries.

KEYWORDS:

atomic layer deposition; lithium−sulfur battery; nanoscale Li2S films

PMID:
25321606
DOI:
10.1021/nn505480w

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