NDLI: High-capacity Li<sub>2</sub>S–nanocarbon composite electrode for all-solid-state rechargeable lithium batteries

Content Provider	Royal Society of Chemistry (RSC)
Author	Tatsumisago, Masahiro Hayashi, Akitoshi Nagao, Motohiro
Copyright Year	2012
Abstract	All-solid-state lithium secondary batteries with Li2S active materials and sulfide-based solid electrolytes (SEs) were fabricated and the Li2S electrodes were characterized. Li2S–nanocarbon composite electrodes were prepared by hand grinding and mechanical milling. Mechanical milling of a mixture of Li2S, acetylene black (AB), and Li2S–P2S5 SE enhanced the reversible capacity of the all-solid-state cells. Cross-sectional transmission electron microscopy images and electron-energy-loss spectroscopy maps revealed the formation of favorable contacts among Li2S, AB, and SE. Nanocomposites consisting of approximately 500 nm Li2S particles and AB and SE particles were well-dispersed both before and after charge–discharge cycles. The effect of reducing the particle size of the Li2S active material in the composite electrodes on cell performance was investigated. Cells containing milled Li2S with small particle sizes exhibited a charge capacity of about 1000 mA h g−1 under 0.064 mA cm−2 at 25 °C and they were charged and discharged at a high current density of 6.4 mA cm−2 (3.5 C). To improve the reversible capacity and the rate performance of all-solid-state cells, it is important to realize intimate contact among electrode components and reduce the particle size of active materials and composite electrodes by mechanical milling.
Starting Page	10015
Ending Page	10020
Page Count	6
File Format	HTM / HTML PDF
ISSN	09599428
Volume Number	22
Issue Number	19
Journal	Journal of Materials Chemistry
DOI	10.1039/c2jm16802b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	AB Lithium SES S.A. Acetylene Transmission electron microscopy Spectroscopy Electric current Intimate Contact Electrode
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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