Journal
JOURNAL OF POWER SOURCES
Volume 449, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2019.227576
Keywords
Lithium-sulfur battery; All-solid-state battery; Fe-based composite cathode material; High-capacity electrode
Funding
- Japan Science and Technology Agency (JST)
- Advanced Low Carbon Technology Research and development Program (ALCA)
- Specially Promoted Research for Innovative Next Generation Batteries (SPRING) project
- [18J11169]
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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.
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