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

JOURNAL OF POWER SOURCES

卷:449

Article

Fujii, Yuta¹  Kobayashi, Misaki¹  Miura, Akira²  Rosero-Navarro, Nataly Carolina²  Li, Minchan^3,4  Sun, Jianguo⁴  Kotobuki, Masashi⁴  Lu, Li⁴  Tadanaga, Kiyoharu² 

[1] Hokkaido Univ, Grad Sch Chem Sci & Engn, Sapporo, Hokkaido 0608628, Japan

[2] Hokkaido Univ, Fac Engn, Sapporo, Hokkaido 0608628, Japan

[3] Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

[4] Natl Univ Singapore, Dept Mech Engn, Singapore 117575, Singapore

关键词: Lithium-sulfur battery;    All-solid-state battery;    Fe-based composite cathode material;    High-capacity electrode;   

DOI  :  10.1016/j.jpowsour.2019.227576

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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