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Fe-P-S electrodes for all-solid-state lithium secondary batteries using sulfide-based solid electrolytes

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Title: Fe-P-S electrodes for all-solid-state lithium secondary batteries using sulfide-based solid electrolytes
Authors: Fujii, Yuta Browse this author
Kobayashi, Misaki Browse this author
Miura, Akira Browse this author →KAKEN DB
Rosero-Navarro, Nataly Carolina Browse this author
Li, Minchan Browse this author
Sun, Jianguo Browse this author
Kotobuki, Masashi Browse this author
Lu, Li Browse this author
Tadanaga, Kiyoharu Browse this author
Keywords: Lithium-sulfur battery
All-solid-state battery
Fe-based composite cathode material
High-capacity electrode
Issue Date: 15-Feb-2020
Publisher: Elsevier
Journal Title: Journal of power sources
Volume: 449
Start Page: 227576
Publisher DOI: 10.1016/j.jpowsour.2019.227576
Abstract: Although lithium-sulfur batteries are expected to be the next-generation high-capacity battery of choices, the sulfur electrodes studied so far contain large amounts (typically 30-60 wt%) of carbon additives, resulting in low energy density. In this study, an Fe-P-S-based material is prepared and characterized for the use as a sulfur electrode with a low content of carbon additives. The electrode material based on Fe-P-S is synthesized by the mechanical milling of FePS3 and elemental sulfur. The ball-milled 70FePS(3)center dot 30S (wt%) electrode comprises FeS2 particles of similar to 30 nm in size and amorphous P-S. The all-solid-state battery operated at 100 degrees C exhibits a reversible capacity of more than 625 mAh g(-1) for 50 cycles at 0.51 mA cm(-2) (similar to 0.1C) in spite of the low carbon content (2 wt%) in the electrode. During the discharge-charge cycle, the sulfur component is confirmed to be both reduced and oxidized, cyclically.
Rights: © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 三浦 章

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