4.3 Article

Fast discharge-charge properties of FePS3 electrode for all-solid-state batteries using sulfide electrolytes and its stable diffusion path

期刊

FUNCTIONAL MATERIALS LETTERS
卷 14, 期 3, 页码 -

出版社

WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S1793604721410058

关键词

Diffusion path; galvanostatic intermittent titration technique (GITT) measurement; iron

资金

  1. Japan Science and Technology Agency (JST)
  2. Advanced Low Carbon Technology Research and Development Program (ALCA)
  3. Specially Promoted Research for Innovative Next Generation Batteries (SPRING) project [18J11169]

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The study demonstrates the fast discharge-charge cycle of micro-sized FePS3 electrode particles in all-solid-state batteries using sulfide electrolytes, achieving high capacity performance and showing a stable diffusion path. Comparisons with FeS revealed lower capacity due to its unstable diffusion path.
We report the fast discharge-charge cycle of micro-sized FePS3 electrode particles in all-solid-state batteries (ASSBs) using sulfide electrolytes at 80 degrees C. At a current density of 2.04 mA cm(-2), corresponding to approximately 1 C, the capacity of the FePS3 electrodes reached similar to 180 mAh g(-1) without any electron or lithium-ion conductive additives. Galvanostatic intermittent titration technique (GITT) measurements showed a stable diffusion path of FePS3 represented by the product of the diffusion coefficient and square of the surface area. These electrochemical properties were compared with those of FeS, whose capacity was lower because of its unstable diffusion path.

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